Answer:
Sun
Explanation:
he sun is a big ball of burning plasma it cuases light the sun is the seco d hottest object in the universe the sun another fact is we learned the sun isn't even a solid it's bassiclly a ball of energy or a constant flaming ball of plasma hydrogen and heluim if the sun went out we would live in darkness forever not to mention we would frezze to death
Because ___ occurs without oxygen scientist believe this stage in cellular respiration evolved first
Because glycolysis occurs without oxygen scientists believe this stage in cellular respiration evolved first.
Glycolysis, which does now no longer require oxygen and is stated to have developed earlier than the opposite energy-generating tiers of cell breathing at a time while there has been no oxygen withinside the Earth's environment The first step is breathing, which is anaerobic and does now no longer require oxygen.
Glycolysis happens withinside the cytosol of the cellular and does now no longer require oxygen, while the Krebs cycle and electron shipping arise in mitochondria and require oxygen.
The first step in cell breathing, glycolysis, happens withinside the cytoplasm of the cellular. A glucose molecule is damaged down into molecules of pyruvate (pyruvate).
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Help I need help on this !! Please
Fast!!
Step 1 convert gal to L step 2 convert L to cl
Here given data is water are held in tanker truck volume = 5,500 gallon
So here 1st we have to convert
5,500 gallon = 20,819 Litre
So in 1st step we have to converted gallons into litre
Then 1 litre = 100 centilitre so,
20,819 Litre = 208.19 centilitre
So, in the 2nd step we have to converted litre to centilitre
5,500 gallon = 20,819 Litre and 20,819 Litre = 208.19 centilitre
This is how the conversion from beginning to ending
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3. Which of the following is not an example of acceleration?
a. A car coming to a stop at a stoplight.
b. An avalanche increasing speed down the side of a mountain.
c. A cheetah running at a constant speed on a hunt.
d. A jet making a sharp turn in an air show.
Answer:
C: The Cheetah running at a constant speed.
Explanation:
Acceleration can be defined as:
1: A decrease in speed
2: An increase in speed
3: A change in direction.
The cheetah is the only object that does not meet any criteria for acceleration.
The example that is not an example of acceleration is a cheetah running at a constant speed on a hunt. The correct option is option (c).
Acceleration refers to a change in velocity, either in magnitude or direction. In the case of the cheetah running at a constant speed, there is no change in velocity, so there is no acceleration.
The cheetah maintains a steady speed, there is no change in velocity hence, it is not accelerating.
Therefore, a cheetah runs at a constant speed on a hunt. The correct option is option (c).
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When the difference between a measured value and the known value is expressed as percentage error, it is usually written as
When the difference between a measured value and the known value is expressed as a percentage error, it is usually written as either negative or positive.
How do introduce differences in measured values?The accepted terminology to introduce differences in measured values during experimentation and data collection is to introduce this difference with the sing based on the first data (either positive or negative).
In conclusion, when the difference between a measured value and the known value is expressed as a percentage error, it is usually written as either negative or positive.
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how are the earthquakes distributed on the map
The earthquakes distributed on the map on the fault lines at edge of tectonic plates.
Tectonic plate boundaries, or along fault lines, are where earthquakes are most likely to occur. On a map showing tectonic plates, earthquakes will be distributed along the lines on the map. The earthquake epicenter locations shown on the map are not dispersed around the earth's surface at random. The majority of earthquake epicenters are confined to a small area. Most earthquake epicenters, including those in the western parts of North and South America, are found at the edges of certain continents. The Pacific Plate is likewise surrounded by earthquakes. Along the Himalayan mountain range, which is over India, there are also frequent earthquakes. Additionally, all regions with active volcanoes have an earthquake epicenter, but not all regions with earthquake epicenters have active volcanoes, if you try to compare the locations of earthquake epicenters and active volcanoes.To learn more about earthquakes visit:
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Name the spectral line in the spectrum of h-atom obtained when an electron jumps from n = 4 to n = 3.
The spectral line has been defined as the more or less number of photons in the spectrum that appears bright or dark. The electron jumping from n = 4 to 3 belongs to the Paschen series.
What is the Paschen series?The Paschen series is the Infrared (I.R) region that has a number of lines estimating from higher energy levels to n = 3 energy levels. If the electron jumps from n = 4 to n = 3 then they have wavelengths of 1875 nm.
This wavelength has been found to lie in the IR region that emits electrons from the atom of hydrogen. The electron tends to move from higher energy states to lower energy states.
Therefore, the electron transition belongs to the Paschen series.
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someone please help me i wasn’t here in class when this was taught
Answer:
text me i can teach you on inbox
Acetylcholine binds to receptors on muscle fibers which open ion channels (allowing ions to move along their concentration gradient), what type of transport is this an example of?
Acetylcholine binds to receptors on muscle fibers which open ion channels (allowing ions to move along their concentration gradient). This is an example of passive transport.
Passive transport is a biological phenomenon of movement that does not require external energy from the cell. It is the movement of ions or other chemical substances within the cells.
This movement happens along the concentration gradient. The chemical substance moves from high concentration to low in this phenomenon. simple and facilitated diffusion that happens in the cell are also types of passive transport. Other than that, passive transport also includes Filtration and Osmosis.
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Sodium bicarbonate or beta-alanine used to improve anaerobic performances exert their effect by?
Sodium bicarbonate or beta-alanine used to improve anaerobic performances exert their effect on the slow rate of decrease of creatine phosphate.
Anaerobic means "with the air" and refers to the body's use of oxygen to produce energy. This typically includes exercises that last longer than 2 minutes. Continuous "steady state" exercise is done with aerobic exercise. Anaerobic means "without air" and refers to the body's ability to produce energy without using oxygen.
Examples of aerobic exercise include swimming laps, running, or cycling. Anaerobic exercise involves a rapid burst of energy and is performed with maximum effort in a short period of time. Examples include jumping, sprinting, and lifting heavy objects. "Walking is a great aerobic exercise. It's thought to be weight-bearing and good for bone strength and health," he says. Oftentimes, people feel unwell and want to lose weight and get fit, but think they need a gym membership to exercise.
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How many moles of oxygen atoms are in 4.14 moles of magnesium phosphate: mg3(po4)2 (mw. 262.87 g/mol)?
33.12 moles of oxygen atoms are present in 4.14 moles of magnesium phosphate, Mg₃(PO₄)₂.
Molecular weight of magnesium phosphate = 262.87 g/mol
Number of moles of magnesium phosphate = 4.14 moles
Since,
1 mole of magnesium phosphate contains 8 moles of oxygen atom
therefore,
4.14 moles of magnesium phosphate will contain 4.14 × 8 oxygen atoms.
1
Hence, 33.12 oxygen atoms are present.
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Why was it important not to over-heat the beaker when drying the sodium chloride?
It important not to over-heat the beaker when drying the sodium chloride so that parts won't be lost, and in addition, if the beaker were to overheat, it would crack.
Can you evaporate sodium chloride?
At gas pressures ranging from 0.74 to 212 psia, the rate of evaporation of molten NaCl in the presence of different gases was observed. The rate in crucibles heated by induction had a distinct slope at high and low pressures and was a linear function of (1/P).It is demonstrated that the (1/P) dependency is predicted for turbulent free convective mass transfer. Under some circumstances, when pressure dropped, the rate of evaporation also did. This result is explained by the condensation of NaCl in the gas and the subsequent reflux of NaCl particles into the melt. The significant disparity in evaporation rates between Ar, He, and CO2 is related to the CO2's infrared absorption as well as variations in thermal conductivity.
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Landfills produce methane, which is a greenhouse gas and contributes to global warming. please select the best answer from the choices provided t f
It is true that methane, which is a greenhouse gas and contributes to global warming.
A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range.
Global warming is rise in the average temperature of the Earth's climate system.
Most often greenhouse gases are carbon dioxide (CO₂) and methane (molecular formula CH₄). These gases come from burning multiple substances: coal, petroleum, plastic and natural gas.
Balanced chemical reaction of combustion of methane:
CH₄ + 2O₂ → CO₂ + 2H₂O
Greenhouse gases are so difficult to measure, because carbone dioxide, methane, chlorofluorocarbons comes from multiple sources, some of which are relatively hard to measure.
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Answer:
It's true
Explanation:
Took the test
1. Eight atoms of carbon react with 18 atoms of hydrogen, forming only one molecule of CsHis. Is the
forming of only one molecule considered a violation of the law of conservation of mass? Explain.
Eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is considered as violation of the law of conservation of mass .
According to the law of mass conservation , neither chemical processes nor physical changes can create or destroy mass in an isolated system . The mass of the products and reactants of a chemical reaction must be equal, in accordance with the law of conservation of mass .
The reaction occur when eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is given as .
8C +18[tex]H_{2}[/tex] → [tex]C_{8} H_{18[/tex]
Mass of reactants = 8 × 12 + 18 × 2 = 132 g
Mass of reactants = 8 × 12 + 18 = 114 g
So , mass of reactant is not equal to the mass of product .
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is gas occupies 733 cm at 10.9 at what temp will it occupy 950 cm
Temperature of gas at volume of 950 cm³ is 368.14K or 94.99⁰c.
Volume is the amount of space a three-dimensional object takes up, expressed in cubic units.units of volume are mL, liter, cm³ or m³.Given,
in this question, volume occupied by gas at 10.9⁰c is 733cm³.
we have to find out temperature at which gas occupies volume of 950 cm³.
First, convert temperature from celcius to Kelvin
10.9⁰c = 10.9 + 273.15 = 284.05 K
By equation or Boyle's Law
P1 x V1 / T1 = P2 x V2 / T2
Pressure is constant here
therefore, V1 / T1 = V2 / T2
here, V1 = 733 cm³
T1 = 284.05 K
V2 = 950 cm³
we have to find out T2
So, 733 / 284.05 = 950 / T2
T2 = 284.05 × 950 / 733 = 368.14 K
= 94. 99⁰c
Therefore the temperature of gas at volume of 950 cm³ is 368.14K or 94.99⁰c.
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Determine the empirical formula of a compound that is 68. 42% cr and 31. 58% o by mass.
Cr2O3 is the empirical formula of a compound that is 68.42% Cr and 31.58% O by mass.
The masses in grams are pretend percentages: 68.4 g Cr 31.6 g ODivide both by the periodic table mass to get the moles: 68.4gCr/51.996=1.316 mol Cr 31.6gO/16.00=1.975 mol OThe lesser quantity (1.316 is less than 1.975) should be used to divide the two mole values: Cr 1.316/1.316=1 O 1.975/1.316=1.5Since 1.5 is not a whole number, and multiplying 0.5 by 2 gets rid of the decimal, multiply both values by 21 Cr (2)=21.5 O (2)=3The subscripts are Cr2O3.
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how many significant figures of .00000281 mA
Answer:
3 Significant Figures.
Explanation:
The zeros to the left of non-zero numbers are Leading Zeros. These zeros are NOT significant. They serve as placeholders to locate the decimal point.
Answer:
3
Explanation:
To determine the number of significant figures in a number use the following 3 rules:
Non-zero digits are always significant
Any zeros between two significant digits are significant
A final zero or trailing zeros in the decimal portion ONLY are significant
Example: .500 or .632000 the zeros are significant
.006 or .000968 the zeros are NOT significant
The type of synapse that occurs between the terminal end of the presynaptic cell and the dendrites of the postsynaptic cell is referred to as which kind of synapse?
Axodendritic type of synapse that occurs between the terminal end of the presynaptic cell and the dendrites of the postsynaptic cell is referred to as which kind of synapse
Synapses are part of the circuits that connect the sensory organs of the peripheral nervous system to the brain. B. People who perceive pain and touch. Synapses connect neurons in the brain to neurons in the rest of the body, and from those neurons to muscles.
A synapse is a small gap between two neurons where nerve impulses are carried by neurotransmitters from the axon of a presynaptic (transmitting) neuron to the dendrites of a postsynaptic (receiving) neuron. It is called the synaptic cleft or synaptic cleft.
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which elements have one valence electron?
Answer:
GOLDEN TRICK
Explanation:
GO TO ND ASK.
MARK 5 STAR FOR THIS BRILLIANT ADVICE.
A glass of orange juice contains 3.1 dl of juice. how many milliliters of orange juice are in the glass?
Answer:
310
Explanation:
constant temperature and the pressure upon it. Write down the relationship in terms of a (a) Proportion (b) equation (c) formula
Answer:
Proportion : The Equality of two ratios
Equation: Values of two mathematical expressions are equal.
Formula: Mathematical relationship or rule expressed in symbols.
Explanation:
A certain sample of liquid has a mass of 42 grams and a volume of 35 centimeters. What is the density of the liquid?
A certain sample of liquid has a mass of 42 grams and a volume of 35 centimeters. The density of the liquid is 1.2 g.cm⁻³
How can I determine a liquid's density?You follow the same procedures you would for a solid to determine the density of a liquid. Divide the mass of the fluid by its volume after computing its volume and weight. Weigh the substance inside the container, then pour it out and weigh the resulting empty vessel. The weight of the empty container is subtracted from the weight of the filled container to determine the fluid's mass.
Calculation of the above problemMass = 42gms
Volume = 35 cm³
Formula Used:
Density = Mass ÷ Volume
Putting values,
Density = 42 g ÷ 35 cm³
Density = 1.2 g.cm⁻³
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You are heating a piece of glass and now want to pick it up. you should?
Answer:
pick it up with tongs
Explanation:
How much energy would be released as an electron moved from the n=4 to the n=3 energy level?
The energy released when electron move from n=4 to n=3 is 0.66 eV
We know that in an atom energy of nth state is
[tex]E_n = -13.6/n^{2}[/tex] eV
where n is the energy level
Therefore,
[tex]E_4 = -13.6/4^{2} \\E_3 = -13.6/3^{2}[/tex]
Thus, [tex]E_4[/tex] = -0.85eV
[tex]E_3[/tex] = -1.51eV
Therefore, total mount of energy released in moving electron from n=4 to n=3 is given by -
[tex]E_4 -E_3[/tex]
= -0.85 - ( -1.51)
= 0.66eV
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Complete each row of the table below by filling in the missing prefix or missing exponent.
The metric prefixes are a follows;
1 ng = 10^-9 g1 dg = 10^-10 g1μg = 10^-6 g1Mg = 10^6 gWhat are metric prefixes?The SI unit is the international system for the measurement of quantities. We know that the SI system is based on the metric system. The metric system has the units meter, gram and seconds as part of it.
Sometimes we use prefixes to show the magnitude of quantities when we are using the metric system. Let us now try to find the correct prefix or power in the following cases;
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2
The melting and boiling points of three pure
substances are given in Table 1.3.
Substance
ethanol
methane
mercury
Melting point
/°C
b
c
-117
-182
-30
Boiling point
/°C
78
-164
357
Table 1.3: Melting and boiling points of ethanol,
methane and mercury.
All three substances have negative values for
their melting point. Which of them has the
lowest melting?
Answer:
-182
Explanation:
according to the table it's the answer
According to forces of attraction and given data the substance with lowest melting point is that one with -182°C.
Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.Thus,the substance with lowest melting point is that one with -182°C.
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A solution of h2so4(aq) with a molal concentration of 6.80 has a density of 1.318 g/ml. what is the molar concentration of this solution?
The molal concentration of the solution is 5.38 M.
The molal concentration of sulphuric acid = 6.80 m
The density of the solution = 1.318 g/ml
Mass of the sulphuric acid in the solution is,
[tex] = 6.80 \times 9.80[/tex]
[tex] =666.4 \: g[/tex]
The mass of sulphuric acid present in the solution is 666.4 g.
Let the mass of the solvent in which sulphuric acid is dissolved be 1000 grams.
So the total mass of the solution is,
= Mass of solvent + Mass of sulphuric acid
[tex] = 666.4 \: + \: 1000[/tex]
[tex] = 1666.4 \: g[/tex]
The total volume of the solution is,
[tex] = \frac{1666.4 \times 1}{1.318 \times 1000} [/tex]
[tex] = 1.264 \: L[/tex]
The volume of the solution is 1.264 liters.
The molal concentration of this solution is,
[tex] = \frac{6.80}{1.264} [/tex]
[tex] = 5.38 \: M[/tex]
Therefore, the molal concentration of the solution is 5.38 M.
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What is the percent yield of koh when 22.4 grams of ko2 reacts with an excess of water to produce 13.9 grams of koh?
The percent yield of KOH is 78.7%.
Balanced chemical reaction:
4KO₂ + 2H₂O → 4KOH +3O₂
m(KO₂) = 22.4 g; mass of the oxide
m1(KOH) = 13.9 g; mass of the potassium hydroxide produced
n(KO₂) = 22.4 g ÷ 71.1 g/mol
n(KO₂) = 0.315 mol; amount of the oxide
From chemical reaction: n(KO₂) : n(KOH) = 1 : 1
n(KOH) = 0.315 mol; amount of the potassium hydroxide
m(KOH) = 0.315 mol x 56.1 g/mol
m(KOH) = 17.67 g; a theoretical yield of KOH
the percent yield = 13.9 g / 17.67 g x 100%
the percent yield = 78.7%
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Suppose you stir a little baking soda into water until the water looks clear again. how could you prove to someone that the clear material is a mixture and not a compound?
To prove to someone that the clear material is a mixture and not a compound, you could put the solution in a cup and then let the water evaporate. The baking soda will stay in the cup.
What is baking soda?Baking soda is a NaHCO₃. Its chemical name of sodium bicarbonate. It is a salt of carbonates. It is used in making dishes. This is used to make cakes or other fermented foods.
Thus, you may put the solution in a cup and then let the water evaporate to demonstrate to someone that the clear substance is a mixture rather than a compound. The cup will hold the baking soda.
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Of the following compounds, which is the most ionic?
(a) sicl4
(b) brcl
(c) pcl3
(d) cl2o
(e) cacl2
cacl2 is the most ionic.
Ionic bonding is the perfect transfer of valence electrons between atoms. This is a type of chemical bond that creates two oppositely charged ions of her. In ionic bonding, metals lose electrons and become positively charged cations, while nonmetals gain their electrons and become negatively charged anions.
An ionic bond also called an electrical bond, is a type of bond created by electrostatic attraction between oppositely charged ions in a compound. Such bonds are formed when the valence (outermost) electron of one atom permanently moves to another atom.
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What would happen to the ph of the cells of a group of people having a contest as to which one can stop breathing for the longest time?
If one can stop breathing for the longest time builds up in their systems pH of the cells causing the pH of their own blood to drop slightly 'pH level increases'
pH means quantitative measure of the acidity or basicity of aqueous or other liquid solutions
For most people its safe to hold your breath for a minute or two but so much longer can decreases oxygen flow to the brain can causing damage your brain as well as in heart a lack of oxygen can cause abnormalities or rhythm and can affect the pumping action of heart and when the brain senses the change in pH due to increased carbon dioxide it increases our respiratory system to get more oxygen and blow out more carbon dioxide in an taking the normal balance between oxygen and carbon dioxide that's why pH level increases
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