If the pulling force of 225 N each is assigned a positive value, the net force of the scenario will be 50 N and the slab will move upward.
What is the net force?The net force acting on an object is the resultant force. It is the sum of all the forces acting on the object.
The forces acting on the slap concrete are three, namely:
The gravitational force of 400 NThe pulling force of 225 N by construction worker 1The pulling force of 225 N by construction worker 2These forces are acting in opposite directions. The gravitational force is acting downward while the pulling forces by the construction workers are acting upward.
Now, the pulling forces of the construction workers are assigned positive values. Since the gravitational force acts in opposition to the pulling forces, it means the gravitational force will be assigned a negative value.
Thus, the resultant force can be calculated as:
225 + 225 - 400 = 50 N
The resultant force is 50 N and positive. This means the slab will move in an upward direction.
More on net forces can be found here: https://brainly.com/question/18031889
#SPJ1
100 Points!
A student reacted 0.3000 grams of aluminum with oxygen gas and obtained 0.5333 grams of aluminum oxide. Based upon the experimental data, determine the experimental empirical formula of this aluminum oxide.
Answer:
Empirical Formula = Al3O4 .
Explanation:
Mass of Aluminium = 0.3000 g
Mass of Oxygen in oxide = 0.5333 g - 0.3000 g = 0.2333 g
Moles of Aluminium = Mass / MOlar Mass = 0.3000 g / 27 g = 0.01112 moles
Moles of Oxygen = Mass / Molar Mass =0.2333 g / 16 g = 0.01458 moles
Now we will divide each of the molar quantities by the smallest number of moles.
Aluminium : 0.01112 moles / 0.01112 moles = 1
Oxygen : 0.01458 moles/ 0.01112 moles =1.31
Since, the ratio between Al and O is 1:1.31 which is not the smallest whole numebr ratio. SO, we will multiply it by the smallest number to get whole number ratios.
So, Here on multiplying the ratio by 3 ,we get Al : O = 3:4.
The experimental empirical formula of the aluminum oxide is Al₂O₃.
To determine the empirical formula of the aluminum oxide, we need to calculate the mole ratios of aluminum (Al) and oxygen (O) based on the given masses.
Convert the masses of aluminum and aluminum oxide to moles:
Aluminum: 0.3000 grams Al * (1 mole Al / molar mass of Al) = X moles AlAluminum oxide: 0.5333 grams Al₂O₃ * (1 mole Al₂O₃ / molar mass of Al₂O₃) = Y moles Al₂O₃Determine the mole ratio of Al to Al₂O₃:
Divide the number of moles of Al by the number of moles of Al₂O₃: X moles Al / Y moles Al₂O₃ = ZSimplify the mole ratio to obtain the empirical formula:
If Z is close to a whole number or a simple ratio (e.g., 1:1, 2:1, 3:1), we can assume the empirical formula is Al₂O₃. In this case, we have assumed that the experimental data is consistent with the empirical formula Al₂O₃.It is important to note that the given experimental data and the resulting empirical formula are based on the assumption that the reaction went to completion and that the measurements were accurate. Further confirmation and analysis, such as using additional experimental techniques or calculations, may be necessary to verify the empirical formula.
To learn more about experimental empirical formula, here
https://brainly.com/question/32634558
#SPJ2
Step 3.
Drag lone pairs of electrons to each terminal atom until each has an octet of electrons, or until all electrons are used. You may remove a lone pair by clicking on it. Check your answer.
There is a double bond between the carbon atoms and a lone pair on oxygen.
What is Lewis structure?The term Lewis structure has to do with the structure that shows the arrangement of atoms in a compound. It is normal that the structure would be composed of the symbols of the elements and the bonds that they form as dots or sometimes as a single line to show shared electrons.
Now we can see that the compound C2H2O is a compound that contains a double bond between the carbon atoms. There is a lone pair of electron that resides on the oxygen atom. The structure of this compound is shown in the image attached.
Learn more about Lewis structure:https://brainly.com/question/20300458
#SPJ1
The amount of heat absorbed by the calorimeter in this reaction must be determined before you can calculate the enthalpy of the reaction that occurs inside of it.
To do this, suppose that you measure exactly 43.5 mL of cool water at 22.0°C and
place it into a calorimeter. Then you add 21.0 mL of warm water (initial temperature
of 37.0°C) to the calorimeter. The final temperature of the entire system is 25.5°C.
Compute the heat capacity of the calorimeter in J K–1 assuming that no heat leaks
into or out of the calorimeter.
The heat capacity of the calorimeter is 16.8 J/K.
What is the heat capacity of the calorimeter?Now we know that the calorimeter is a device from which there is no heat loss or gain. In this case, the heat lost by the hot water is equal to the heat gained by the calorimeter.
Thus;
cwθ = ccθ
Where;
cc= heat capacity of the calorimeter
cw = heat capacity of water
θ == temperature change
Hence;
4.2 * (37 - 25) = cc (25 - 22)
cc = 4.2 * (37 - 25)/(25 - 22)
cc = 16.8 J/K
Learn more about heat capacity:https://brainly.com/question/1747943
#SPJ1
Hydrogen has one electron, helium has two electrons, and lithium has three electrons. Hydrogen and lithium are both reactive, but helium is unreactive. How could the quantum mechanical model of the atom explain this pattern of behavior?
The valence shell of an atom if completed octet or the maximum number of electrons it can fill then it will be stable. Helium is not reactive because it is highly stable and its valence shell is fully filled.
What is helium?Helium, is the second element in the periodic positioned in the noble gas group. It have an electronic configuration of K=2. The only orbital it have is K and it is completely filled. That's why it is stable.
According to quantum mechanical model of atom, each orbital have a certain capacity to accommodate electrons and an orbital is considered as a wavefunction.
When the valence orbitals fulfill the electrons, then the atom is no longer need an electron or never donate from the completely filled state. Hence it becomes unreactive.
The valence shell of hydrogen and lithium is not completely filled and they are reactive to gain electron to attain stability. Therefore, helium is unreactive because of its stability.
To learn more about helium, refer the link below:
https://brainly.com/question/10621283
#SPJ2
Choose one of the following articles to read. Then you will summarize the article in 3-5 sentences and give a 2-3 sentence reflection on your personal thoughts on the article. Your answer must be in complete sentences and use proper sentence structure. Your answers must contain the listed terms and use them in the correct context. CAPITALIZZE the listed term within your answer. Label your answer the with question # you choose.
Do Astronauts need sunscreen in space?
Be sure to use the following terms in your summary: ultraviolet radiation, electromagnetic waves, wavelength
Why is the color blue so rare in nature?
Be sure to use the following terms in your summary: waves, visible light, wavelengths
Explain the difference between radiation and radioactivity
Be sure to use the following terms in your summary: electron, wave, electromagnetic radiation
To know more about electromagnetic spectrum visit : https://brainly.com/question/18704022
#SPJ9
Which of the following statements is a hypothesis?
A Why do I see more rats at a smoker's house than
a non-smoker's house
B I think that cigarette smoke increases the
appetite of rats
C
I will place three rats in three separate cages and
expose them to varying amounts of cigarette smoke
D The rat which exposed to the most smoke, ate a
larger amount of cheese compared to the other rats
Correct hypothesis is 'i will place three rats in three separate cages and
expose them to varying amounts of cigarette smoke'
Here given statement C is correct in hypothesis because when we place three rats in three separate cages and expose them to varying amounts of cigarette smoke then 50% rat are kill because nicotine concentration in the mainstream smoke particulate matter of reference cigarettes are 70%-8% and it take 20 min to kill the rats
Know more about rats
https://brainly.com/question/14313260
#SPJ1
Can somebody please help me
Answer:
A.
Explanation:
Spiders are creepy.
That your answer.
What is the meaning of electronegativity
Answer:
Electronegativity is the ability of an atom to attract the shared pair of electrons towards itself *in a molecule*
PLEASE HELP
Claim: Write a Claim statement
How does the abundance(amount) of each isotope affect the average atomic mass of a mixture of atoms of the same element?
The average atomic mass of a mixture of atoms of the same element will...
The abundance(amount) of each isotope determines the relative atomic mass.
What is the relative atomic mass?The relative atomic mass refers to the mass of the atom that is obtained by adding together the products of the relative atomic masses of each isotope and the relative abundance of the isotope.
Hence, we can say that, since the relative atomic mass takes into account the masses and percentage abundance of all the isotopes, it then follows that the abundance(amount) of each isotope determines the relative atomic mass.
Learn more about relative atomic mass:https://brainly.com/question/25698972
#SPJ1
If you have a sample of 3.5 × 1022 atoms of tin (Sn), how many moles of tin do you have?
The correct answer according to the text is 0.058 mol Sn but no matter how I work it, I get 5.8 X 10^-2 mol Sn. I am using a scientific calculator. How did they get that answer?
The number of mole of tin (Sn) that you have is 0.058 mole
Avogadro's hypothesis6.02×10²³ atoms = 1 mole of tin (Sn)
With the above information, we can obtain the number of mole ot tin. Details below
How to determine the mole of tin that contains 3.5×10²² atomsWe can obtain the number of mole of tin as follow:
6.02×10²³ atoms = 1 mole of tin (Sn)
Therefore,
3.5×10²² atoms = (3.5×10²² atoms × 1 mole) / 6.02×10²³ atoms
3.5×10²² atoms = 0.058 mole of tin (Sn)
Thus, the number of mole of tin (Sn) you have is 0.058 mole
Learn more about mole and avogadro's number:
https://brainly.com/question/8512069
#SPJ1
The density of air is 1.29 grams/Litre. What is the weight, in kilograms of a cubic metre (1.00 m^3) of air?
The density of air is 1.29 grams/Litre. The weight, in kilograms of a cubic meter (1.00 m^3) of air is 1.29 kg
How can you calculate the density of humid air?Humid air's density can be calculated by treating it as a mixture of ideal gases. The vapour pressure is the partial pressure of water vapour in this case. In the temperature range of 10 °C to 50 °C, the density calculation error is less than 0.2% using this method.
given that
Density =mass/ volume
1.29grams/ liter =[tex]\frac{mass}{m^{3} }[/tex]
1 liter = 0.001 [tex]m^{3}[/tex] and 1 kilogram = 0.001grams
0.00129 kg/[tex]m^{3}[/tex] = mass / 0.001 [tex]m^{3}[/tex]
mass =0.00129 kg/[tex]m^{3}[/tex] /0.001 [tex]m^{3}[/tex]
which means,
mass= 1.29 kg
The density of air is 1.29 grams/Litre. The weight, in kilograms of a cubic meter (1.00 m^3) of air is 1.29 kg
Learn more about vapour pressure here:-
https://brainly.com/question/26006166
#SPJ9
How many moles water contain 1.51x10^24 molecules of water
2.507 moles of water is present in 1.51 x 10^24 molecules of water
The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12
Every mole contain a certain number of atoms which is the Avogadro's number
Avogadro's number states that each mole of every compound contains
6.023x 10^23 atoms of molecules
It is given to us to find out how many moles of water is present in 1.51 x 10^24
The number of moles of water present = 1.51 x 10^24 / 6.023 x 10^23
=2.507 moles
Hence, 2.507 moles of water is present in 1.51 x 10^24 molecules of water
For further reference:
https://brainly.com/question/7699439?referrer=searchResults
#SPJ9
A pediatric patient with a body mass of 75 pounds is prescribed Rohypnol for arrhythmia. The recommended dose is 3 mg per kilogram per day given in divided doses every six hours how many milligrams of propanol should be given for each dose
The milligrams of propanol should be given for each dose is 101.25 mg.
How much should be given for each dose?We know that drug is a chemical that is taken into the body to achieve a particular end which is to stop sickness. The amount at which drug should be given is called the dose of the drug.
The mass of the patient is 75 pounds we have to convert this weight to kilograms.
1 pound = 0.45 Kg
75 pounds = 75 pounds * 0.45 Kg/1 pound
= 33.75 Kg
If the dose is 3 mg per kilogram then;
3 mg should be given for 1 kilogram of body mass
x mg should be given for 33.75 Kg of body mass
x = 3 mg * 33.75 Kg / 1 kilogram
= 101.25 mg
Hence, milligrams of propanol should be given for each dose is 101.25 mg.
Learn more about dose of a drug:https://brainly.com/question/14992727
#SPJ1
Question 2 of 10
Which chemical equation is balanced?
A. CO₂ + H₂O → H₂CO₂
B. K+ H₂O → K₂O + H₂
C. CaO2 + HCl → CaCl₂ + H₂O
OD. MgO + 2HCl → MgCl₂ + H₂O
The equation MgO + 2HCl → MgCl₂ + H₂O is a balanced equation.
A balanced chemical equation contains equal number of atoms on both sides of the equation.The equation is MgO + 2HCl → MgCl₂ + H₂O which contains 1 atom of Mg, 2 atoms of chlorine, 2 atoms of chlorine, 1 atom of oxygen on both reactants and products sides.So the equation is balanced.An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction. In other words, both sides of the reaction have equal amounts of mass and charge.It follows law of conservation of mass.Mass is neither created nor destroyed rather it can be transferred from one form to another.Learn more about balanced equation at:
brainly.com/question/2829417
#SPJ9
what is the volume in milliliter of 7.44 g of acetone
The volume in milliliter of 7.44 g of acetone 9.4897 mL
It is necessary to understand a substance's mass, volume, and density in order to answer this question. By dividing a material's mass by volume, the density of the substance may be calculated. The equation for density may now be written in mathematical form using the expression for density, and the equation for mass can be produced by rearrangement using the equation for density as a starting point.
Mass of acetone = 7.44 g (given)
Volume of acetone (v) = mass of acetone ÷ density of acetone
V = 7.44 g ÷ 0.784 g/mL
V = 9.4897 mL
Hence volume of acetone = 9.4897 mL
To learn more about density refer the link:
https://brainly.com/question/6107689
#SPJ9
Sample of krypton gas occupies 75.0 mL at 0.400 atm. If the temp remained constant, what volume would the krypton occupy at A. 4.00 atm; B. 0.0400 atm; C. 765 torr; D. 4.00 torr; E. 3.50x10^-2 torr?
The correct answer for volume would the krypton occupy are 29.8 mL , 5375 mL , 6.5 * 10^ 5 mL .
We can solve this problem by using Boyle's Law, which states that:
"For a fixed mass of an ideal gas kept at constant temperature, the pressure
of the gas is inversely proportional to its volume"
Mathematically:
pV = const. where
p is the pressure of the gas
V is its volume
We can rewrite the formula as
PiVi = P2V2
For the gas in this problem:
P=0.400atm is the initial pressure
Vi 75.0mL is the initial volume
765mm Hg 1.006am is the final pressure (using the conversion factor
1atm = 760atm )
Solving for V2, we find the final volume:
V 2 =p1vi/ p2 =(0.400) (75.0)/ 1.006 = 29.8mL
We can solve this part by using again the equation:
Where in this case we have:
p 1= 0.400at is the initial pressure
V_{1} = 75mL is the initial volume
p_{2} = 4, nm*H_{0} is the final pressure
Converting into atmospheres,
p_{2} = 4 Hg 7mm/d -0.00536m
And solving for V2, we find the final volume:
V_{2} = (p_{1}*V_{1})/p_{2} = ((0.4)(75))/0.0056 = 5357mL
e)
As before, we use Boyles' Law:
p{1}*V{1} = p{2}*V{2}
In this part we have:
p{1} = 0.4atm is the initial pressure of the gas
V{1} = 75mL is the initial volume of the gas
p{2} = 3.5 * 10 ^ - 2 torr
1 torr is equivalent to 1 mmHg, so the conversion factor is the same as before.
therefore the final pressure in atmospheres is:
p2=3.50 *10^-2 2mm Hg 760mmHg/atm 4.6-10-atm
And so, the final volume of the krypton gas is:
V{2} = (p{1}V{1})/p{2} = ((0.4)(75))/(4.6 * 10 ^ - 5) = 6.5 * 10 ^ 5 * mL.
Learn more about boyle's law here :-
https://brainly.com/question/1437490
#SPJ9
The data table below shows the yield of vegetables in a school's garden for three years. The yield is the number of pounds of vegetables harvested. The same number of each type of vegetable was planted every year
The correct option is (d) ,i.e., the acorn squash yield lessen from 2012 to 2013 due to lower temperatures.
To estimate yield of vegetables in a harmonious manner, one can gather 10' of row at several locales in the field. Multiply the average yield( lb) per 10' of row times the following row distance factors to convert the sample of yields of vegetables to lb/A.
The question is incomplete the given questions is a multiple choice question :
The data table shows the yield of vegetables in a garden of the school for 3 years. The yield is the number of pounds of vegetables gathered. The same number of each type of vegetable was planted every time. Which statement is an inference?
a. the onion yield was higher than the beet yield in 2013
b. the butternut squash yield lessened from 2011-2012
c. the spinach yield was 102 pounds in 2011 and 137 pounds in 2012
d. the acorn squash yield lessen from 2012 to 2013 due to lower temperatures
To know more about yield of vegetables here :
https://brainly.com/question/9195536?referrer=searchResults
#SPJ1
if the statue has a volume of 4.9m^3 and the density of marble is 2.76g/cm^3 what is the mass of the statue
If the statue has a volume of 4.9m^3 and the density of marble is 2.76g/cm^3 then, the mass of the statue is 0.563 kg.
Equation :ρ = m / V
where,
ρ = density
m = mass
V = volume
As given in the equation,
ρ is 2.76g / cm³
V is 4.9m³
So by using the formula,
ρ = m / V
we have,
2.76g / cm³ = m / 4.9m³
m = 2.76 / 4.9
m = 0.563 kg
Volume :Volume is a measurement of the amount of three-dimensional space that is occupied. It is frequently numerical quantified using SI-derived units or various imperial units. The definition of length is linked to the definition of volume. In contrast, the mass and density formula is rho = m / V.
To know more about mass visit :
https://brainly.com/question/15959704
#SPJ9
What are FIVE investigation techniques Judy Hopps and Nick Wilde use to crack the case in the movie Zootopia?
Answer:
1 - Crime Scene Analysis
2 - Conducting Interviews
3 - Surveillance
4 - Interrogation
5 - Developing Other Sources of Information
Explanation:
1 - Judy and Nick investigate the limousine where the attack occurred, discovering polar bear fur.
2 - Judy and Nick interview the elephant Yoga Instructor (really the Yak) at the Mystic Spring Oasis.
3 - Judy and Nick watch Zootopia Traffic Network surveillance in the Assistant Mayor's Office to discover where the "Night Howlers" were going.
4 - Judy interrogates the weasel who stole the onions earlier in the movie with the help of Mr. Big threatening to ice him.
5 - Judy uses leverage to force Nick Wilde to help in the investigation. Nick provides another source of information with his connection to his friend Flash at the Department of Mammal Vehicles who runs their plate number.
*These Investigation Techniques are defined in the study "CRIMINAL INVESTIGATION TECHNIQUES" listed on the U.S. Department of Justice Office of Justice Programs website*
The emission spectrum of cesium contains two lines whose frequencies are (a)
3.45 xx 10¹4 Hz and (b) 6.53 xx 10¹4 Hz. What are the wavelengths and energies per
photon of the two lines? What color are the lines?
The lines are violet and blue respectively.
What is the energy?We know that the energy of the photon could be obtained by the use of the equation;
E = hf
E = energy
h = Plank's constant
f = frequency
For the first line;
E = 6.6 * 10^-34 Js * 3.45 x 10^14 Hz = 2.3 * 10^-19 J
Given that;
E = hc/λ
λ = hc/E
λ = 6.6 * 10^-34 * 3 * 10^8/2.3 * 10^-19
λ = 8.61 * 10^-7 m or 861 nm
The color is violet
For the second line;
E = 6.6 * 10^-34 Js * 6.53 xx 10^14 Hz
E = 4.3 * 10^-19 J
E = hc/λ
λ = hc/E
λ = 6.6 * 10^-34 * 3 * 10^8/4.3 * 10^-19
λ = 4.60 * 10^- 7 m or 460 nm
The color is blue
Learn more about emission spectrum:https://brainly.com/question/13537021
#SPJ1
10) A graduated cylinder has a mass of 50 g when empty. When 30 mL of water is added, the graduated
cylinder has a mass of 120 g. If a rock is added to the graduated cylinder, the water level rises to 75
mL and the total mass is now 250 g. What is the density of the rock?
M=
V=
D=
The rock would weigh 2.89 grams per milliliter.
It is the mass of anything or body per unit volume of that specific object or body.
Equals volume / mass
A graduated cylinder has a mass of 50g when empty, as stated in the problem. The graduated cylinder has a mass of 120g after 30 mL of water have been added.
The rock weighs 250 grams, or 130 grams.
the rock's volume is equal to 75 milliliters minus 30 milliliters, or 45 milliliters.
Mass of the rock divided by volume equals 2.89 grams per milliliter, which is the density of the rock.
As a result, the rock has a density of 2.89 grams per milliliter.
Learn more about density from here-
https://brainly.com/question/15164682
#SPJ9
What is concentration of N2O5 in the following first order reaction in which the rate is 2.4*10^-5 mole/L and rate constant is 3 * 10 ^ - 5 * S ^ - 1 ?
0.8mole/L is concentration of N2O5.
As the reaction is first order ,
so the order with respect to N2O5 is 1.
general,
Rate of equation is written as
rate = k [N2O5]^1
k is the rate constant = 3 * 10 ^ - 5 * S ^ - 1
rate = 2.4*10^-5 mole/L
N2O5 is concentration term
2.4*10^-5 mole/L = 3 * 10 ^ - 5 * S ^ - 1 [ N2O5]
N2O5 = [0.8 mole/L]
=0.8mole/L
Learn more about N2O5 here:
https://brainly.com/question/19100869
#SPJ9
10
Determine the formal charges on all atoms in the molecules.
a. :N=N=N:
b. : CEO:
C.
:0:
O.N.O
Formal charge = number of valence electron - 1/2 bonded electron - lone pair electron
a. N3 = number of valence electron - 1/2 bonded electron - lone pair e-
= 5 - 2/4 - 4
= -1
b. CO = number of valence electron - 1/2 bonded electron - lone pair e-
Charge on carbon
= 4 - 2 - 6/2
= -1
charge on oxygen
number of valence electron - 1/2 bonded electron - lone pair e-
= 6 - 2 - 6/2
= +1
c. NO3
by making structure we found that each oxygen has different charge in this compound.
O = -1, -1 , 0
N = 0
To know more about Formal charge visit :
https://brainly.com/question/11723212
#SPJ9
A typical aspirin tablet contains 321 mg of the active ingredient acetylsalicylic acid. convert to grams
A typical aspirin tablet contains 321 mg of the active ingredient acetylsalicylic acid and 321 mg makes 0.321 g.
Define Aspirin.The nonsteroidal anti-inflammatory medicine (NSAID) aspirin, often referred to as acetylsalicylic acid (ASA), is used to treat a variety of inflammatory disorders by lowering pain, fever, and/or inflammation. These conditions include Kawasaki disease, pericarditis, and rheumatic fever.
Long-term usage of aspirin is also used to help those at high risk avoid further heart attacks, ischemic strokes, and blood clots. Effects of pain or fever often start within 30 minutes. Aspirin functions similarly to other NSAIDs but also inhibits platelet function.
What risks does aspirin pose?Your doctor should be consulted when deciding whether or not to take aspirin because it depends on your cardiovascular risk, according to Wong. While aspirin is often taken safely by many people, it can also result in life-threatening stomach, intestinal, and brain bleeding.
convert mg to gram1 mg = 1/1000 g
so,
321 mg = 321/ 1000g
= 0.321g
Learn more about Aspirin here:-
https://brainly.com/question/14320356
#SPJ9
A "fuzzy cloud" around the nucleus of an atom where an electron is likely to
be found is called
a) an orbital b) valence shell c) ground state
d) none of these
A "fuzzy cloud" around the nucleus of an atom where an electron is likely to be found will be called an orbital. Option A.
What are orbitals?Orbitals are regions within the atom where electrons can be found.
A typical electron contains electrons that are negatively charged, protons that are positively charged, and neutrons that have no charges.
The positively charged protons and neutral neutrons form the core or the nucleus of the atom. The electrons, on the other hand, are located outside the nucleus.
The regions where electrons of atoms are located are collectively called orbitals.
More on orbitals can be found here: https://brainly.com/question/18914648
#SPJ1
How many moles of calcium do you have if you measure out 19.13 g of calcium?
Answer:
0.4773 moles Ca
Explanation:
To find the amount of moles, you need to multiply the mass (g) by the atomic mass of calcium. The atomic mass compares the mass of calcium per every one mole. It is important to arrange the ratio in a way that allows for the cancellation of units (grams should be in the denominator). The final answer should have 4 sig figs to match the given value.
Atomic Mass (Ca): 40.078 g/mol
19.13 g Ca 1 mole
------------------- x ------------------- = 0.4773 moles Ca
40.078 g
how light behaves as it relates to its nature (waves or particles).
Light travels as
and interacts with matter as
Light travels as a "wave" and interacts with matter as a "particle".
Electromagnetic radiation that the human eye can detect as light. From radio waves with wavelengths measured in metres to gamma rays with wavelengths shorter than roughly 1 1011 metres, electromagnetic radiation occurs throughout a very broad range of wavelengths. The wavelengths of light that are visible to humans fall into a very small range within that wide spectrum, ranging from about 700 nanometers (nm; billionths of a metre) for the red light to roughly 400 nm for violet light.
Infrared and ultraviolet are two spectral bands that are close to the visible band and are frequently referred to as light as well. A fundamental physics constant, the speed of light in a vacuum is currently accepted to be 299,792,458 metres per second.
To learn more about light please visit-
https://brainly.com/question/15200315
#SPJ9
how can we apply our knowledge about matter in our lives]
Answer:
The answer is
Explanation:
by studying the matter and its parts and also discovering the wonders of our earth
This is an impossible formula. Pretend it is real.
If you had 1 mol of Cr8(PO4)3 how many moles of Cr would there be?
Remember that you should never include a 1 as a subscript but for the sake of clarity for this problem you may see a 1 as a subscript.
Fe = 52.00 g/mol
P = 30.97 g/mol
O = 16.00 g/mol
Make sure your answer includes TWO decimal places.
The number of mole of Cr in 1 mole of Cr₈(PO₄)₃ is 8.00 moles
Description of Cr₈(PO₄)₃From the formula of the compound, Cr₈(PO₄)₃, the following were obtained:
8 moles of Cr3 moles of P12 moles of OHow to determine the number of mole of Cr in 1 mole of Cr₈(PO₄)₃From the formula, we can see that 8 moles of Cr are present.
Thus, 1 mole of Cr₈(PO₄)₃ will contain = 1 × 8 = 8.00 moles of Cr
Therefore, we can conclude that 1 mole of Cr₈(PO₄)₃ contains 8.00 moles of Cr
Learn more about moles of element in a compound:
https://brainly.com/question/28037816
#SPJ1
1. (1 point) The Sherlock Holmes story, the Sign of the Four, involves the Great Mogul
diamond. Before cutting, its weight was 787 carats. 1 carat = 0.200 gram. Assume that
the diamond is pure carbon. Calculate the number of moles of carbon in the uncut Great
Mogul diamond. Also calculate the number of carbon atoms.
no. of moles in uncut diamond are 13.11 mol and number of Carbon atoms are 78.94 × 10^23.
The atoms of diamond are grouped in a crystal structure known as diamond cubic, and it is a solid form of the element carbon. The chemically stable form of carbon is another solid form of carbon known as graphite at ambient temperature and pressure, but diamond transforms to it very slowly.We are aware that a mole is a unit of measurement for a substance that contains precisely the same number of atoms as 12 g of C12.The mass of a substance is given in this case. We are aware that the diamond is Carbon's allotrope.
weight of diamond before cutting = 787 carats
1 carat. = 0.200 gram
therefore, 787 carats. = 787 × 0.200
= 157.4 gram
To calculate the number of moles equation is
Number of moles =Mass / Molar mass
Molar mass of carbon Is 12g/mol
therefore, no. of moles = 157.4 / 12 = 13.11 mol
We know that 1 mol of any substance contains 6.022×10^23 atoms.
Here we have 13.11 mol of carbon. thus,
No. of Carbon atoms = 13.11 × (6.022×10^23 / 1 mol) = 78.94 × 10^23
Thus, 13.11 mol of diamond contain 78.94 × 10^23 number of Carbon atoms.
Learn more about allotropes here:
https://brainly.com/question/13058829
#SPJ9