"Saccharomyces cerevisiae causes bread to rise by creating carbon dioxide bubbles as a byproduct of fermentation."
This statement is true.
Fermentation is the technique of making carbon dioxide bubbles that reason the dough to rise.
Carbon dioxide is produced in the course of fermentation and turns into trapped withinside the dough as a small wallet of air. this will increase it. When baked, the carbonic acid expands and the bread rises even extra.
Bread rises due to the fact the yeast eats the sugar and releases the carbon dioxide trapped withinside the gluten of the bread. The extra sugar the yeast eats, the extra fuel line it produces, and the taller the bread rise!
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Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties? sr, te n, p in, sb k, be cr, kr
Nitrogen and phosphorous are pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties
Nitrogen and phosphorous are in same group VA group called pictogens and nitrogen family Nitrogen and phosphorous pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties Nitrogen and phosphorous have same valence electron that's why their physical and chemical properties are same
Phosphorus is a chemical element with an atomic number of 15, which means that the atomic structure includes 15 protons and 15 electrons. For Phosphorus, the chemical symbol is P the Phosphorus is also came under VA group called pictogens and nitrogen family thats why Nitrogen and Phosphorus are pair of elements expect to exhibit the greatest similarity in their physical and chemical properties.
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6. You are asked to calculate the density of an unknown metal block. The mass of the block was measured to be 83.0 g. When the block was placed in a graduated cylinder containing water, the volume of the block was measured as 17.2 mL. Calculate the density of this unknown metal.
Density of the unknown metal is 4.82 g/mL
A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol ρ.The volume and mass of the substance must be known in order to compute density.Given,
mass of block is 83 g
When the block was placed in a graduated cylinder containing water, the volume of the block was 17.2 mL.
we have to find density with the help of these two terms,
As we know,
Density = Mass/volume
therefore,
Density = 83 / 17.2
= 4.82 g/mL
thus, density of unknown metal block is 4.82g/mL
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The is the si unit that expresses the amount of substance. Specifically, it is defined as the amount of substance containing the same number of entities as the number of in exactly 12 g of carbon-12.
The Mole is the SI unit that expresses the amount of substance. Specifically, mole is defined as the amount of substance containing the same number of entities as there are in the 12 grams of Carbon - 12.
Mole is denoted by using symbol mol.
Mole = 6.022 x 10²³ elementary entities.
These number of elementary entities in 1 mole is equal to or called as an Avogadro's number. Mole is equal to 6.022 x 10²³ because this number of entity is same as in exactly 12 g of carbon-12.
It is a very important SI unit of measured which is used by the chemists. Moles are used in measuring in small or tiny things such as atoms, molecules and the other tiny particles.
A mole is the atomic weight of any molecule which is measured in grams. The concept of mole might be used for the mass and number of particles conversion.
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Why would returning chemicals to a reagent bottle introduce contaminants?
Because the excess chemical compound can be contaminated with other chemical compound and some reaction can be happen thats why returning chemicals to a reagent bottle introduce contaminants.
There is a chance for the chemicals which is taken out from the reagent bottle to be contaminated with other substances. the chemical property of some of these chemicals may change on contact with air. all these factors may affect the quality of further reactions that were supposed to be carried out by these unused reagents
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What type of molecule is shown below?
Answer:
It is an alkene
Explanation:
First, this is a hydrocarbon because it has only carbons and hydrogens. Second, we see the C=C which is a double bond. Double bonds between carbons make it an alkene.
In the first 85.0 s of this reaction, the concentration of no dropped from 1.12 m to 0.520 m . calculate the average rate of the reaction in this time interval.
In the first 85.0 s of this reaction, the concentration of no dropped from 1.12 m to 0.520 m .
What is rate of a reaction?
The speed at which a chemical reaction takes place is the rate of the reaction. It is the concentration change per unit time of a reactant in a reaction.
Since the concentration of NO reduces to half its initial concentration in 85 seconds that is from 1.12m to 0.520m, it can be said that 85 seconds is the half life interval for the reaction, Hence on average, half reaction is completed in the time interval of 85 seconds.
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A compound is known to consist of 23.8% carbon, 5.9% hydrogen, and 70.3% chlorine. Find its formula.
how about give me brainliest b ll tt cc hh
Solve the simultaneous equation
-4x+3y=1
6x-y=2
Answer:
x = 1/2 y = 1
Step-by-step explanation:
Now form equation for y,
→ 6x - y = 2
→ y = 6x - 2
Then the value of x will be,
→ -4x + 3y = 1
→ -4x + 3(6x - 2) = 1
→ -4x + 18x - 6 = 1
→ 14x = 1 + 6
→ x = 7/14
→ [ x = 1/2 ]
Hence, the value of x is 1/2 (or) 0.5.
Now the value of y will be,
→ y = 6x - 2
→ y = 6(1/2) - 2
→ y = 3 - 2
→ [ y = 1 ]
Hence, the value of y is 1.
When nad becomes nadh, it is being? oxidized and releasing chemical energy. reduced and gaining chemical energy. oxidized and gaining chemical energy. reduced and releasing chemical energy.
When NAD becomes NADH, it is being reduced and gaining chemical energy.
Nicotinamide adenine dinucleotide (NAD), a coenzyme, can exist in two forms, NAD⁺ (oxidized) and NADH (reduced form).
Electrons and protons released in catabolism reactions are attached to NAD⁺. The conversion of NAD⁺ to NADH is important reaction for production of ATP during the cellular respiration.
Reduction is lowering oxidation number because element, ion or compound gain electrons.
Chemical equation for reaction of reduction of NAD⁺ (see picture below):
NAD⁺ + 2e⁻ + H⁺ → NADH
Nicotinamide adenine dinucleotide (NAD) is made of two nucleosides joined by pyrophosphate.
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What is the forward rate with continuous compounding for a three-month period starting in one year?
Answer:8.7%
Explanation:
The forward rate for a three-month period starting in one year is 11.36% per annum.
The forward rate for a specific time period represents the interest rate for borrowing or lending money during that period in the future.
Let's denote:
[tex]r_1[/tex] = Spot rate for one year (annual rate)
[tex]r_2[/tex] = Spot rate for one year and three months (annual rate)
The formula for the forward rate with continuous compounding is given by:
[tex]\[ F = \frac{e^{(r2 * t2)} - e^{(r1 * t1)}}{t2 - t1} \][/tex]
where:
F is the forward rate
[tex]t_1[/tex] is the starting time in years (one year)
[tex]t_2[/tex] is the ending time in years (one year and three months)
Substituting the value
[tex]\[ r_1 = 9.5\% \\r_1 = 0.095)[/tex]
[tex]r_2 = 0.096\\\[ t1 = 1 \text{ year} \][/tex]
[tex]\[ t2 = 1 + \frac{3}{12}[/tex] = 1.25 year back to the formula as
[tex]\[ F = \frac{e^{(0.096 * 1.25)} - e^{(0.095 * 1)}}{1.25 - 1} \][/tex]
[tex]\[ F = \frac{e^{0.12} - e^{0.095}}{0.25} \][/tex]
[tex]\[ F = \dfrac{1.1275 - 1.0991}{0.25} \][/tex]
[tex]\[ F= \dfrac{0.0284}{0.25} \][/tex]
F= 0.1136
Now, convert the forward rate back to percentage:
Forward rate (F) ≈ 0.1136 * 100% = 11.36%
So, the forward rate is 11.36% per annum.
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The missing table attached at the end.
Hydrogen sulfide gas is reacted with dioxygen gas to produce gaseous sulfur dioxide and water. True or false?.
Hydrogen sulfide gas is reacted with dioxygen gas to produce gaseous sulfur dioxide and water. It is false.
When hydrogen sulfide gas reacts with dioxygen gas, it produces water and solid Sulphur and not gaseous sulfur. The chemical equation of the given substances is :
2H2S + O2 → 2S + 2H20
It is a redox reaction as both Oxidation and reduction happens in it. Oxidation of hydrogen sulphur to sulphur happens and reductions of oxygen to water takes place.
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Substituting the residue at position 54 of bvga with which amino acid will least likely prevent the expression of the ptx operon?
a. glycine
b. asparagine
c. glutamate
d. alanine
Glutamate is an amino acid that is put together in the body and also take place commonly in many foods.
Glutamate acts as a neurotransmitter.
Neurotransmitter act as a messenger.
A chemical messenger.
According to question,
C- one and only that is negative charge
As glutamate and aspartate both shore up a negative charge at corporal pH,a interchange of glutamate for an aspartate is the most reactionary and unlikely to act on the BvgA upholder binding and the C- only one that is negative charged of the pTx operon
Glycine, Asparagine and Alanine have no charged.
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When the renal tubules secrete hydrogen ions into the tubular fluid, they __________ at the same time.
When the renal tubules secrete hydrogen ions into the tubular fluid, they reabsorb sodium at the same time.
What are renal tubules?
The tiny or microscopic structural and functional component of the kidney called a nephron. A renal corpuscle and a renal tubule make up its structure. From the capsule protrudes the renal tubule.
One of the many microscopic tubes in the kidneys that replenishes the blood with nutrients, fluids, and other substances that have been removed from it but are still required by the organism. Urine is created in the renal tubules from any leftover fluid and trash.
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One of the basic building blocks of matter, which cannot be broken down by chemical means is a(n)______ , of which there are 92 that occur naturally.
One of the basic building blocks of matter, which cannot be broken down by chemical means is an element.
The first chemical element is hydrogen (atomic number is 1) and the last is oganesson (atomic number is 118).
Elements are scheduled in Periodic table, ordered by their atomic number.
Other example, krypton is a chemical element with symbol Kr and atomic number 36.
Krypton has 36 electron and 36. It is noble gas (group 18).
Noble gases are in group 18: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). They have very low chemical reactivity.
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What will be the coordinates of B' if the triangle below is reflected across the y-axis? Pre-image Points: A(1.-4) B(2, -1) C(6,-4) A.(-1,2) B.(1,-2) C.(-2,-1) D.(2,1)
The coordinates of B' is (2,1) if the triangle below is reflected across the y-axis .
Hence , option D is correct one .
A reflection is a transformation of the graph of a function over x - axis or the y - axis ( or both ) . The x-coordinate of each point must be negated while reflecting across the Y- axis, but the value must remain unchanged .
Each point in a figure is transformed into a reflection by reflecting it over a line. This reflection translates the ABC triangle (A, B, and C) . The outcome is a brand-new figure known as the picture .
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When two protons are extremely close to each other there is a strong __________ between them.
When two protons are extremely close to each other, there is a strong nuclear force between them.
The force between a proton and neutron is same as the force between two proton, which the nuclear force. Nuclear forces can also be called as the nuclear interactions. Nuclear forces affects the neutrons and protons, both nucleons in identical or similar way.
Strong nuclear force is one of the fundamental forces of the nature and it is strongest among the four. Four fundamental forces are -Gravitation, strong nuclear force, weak nuclear force, and electromagnetism.
The energy that is used in nuclear power and nuclear weapons, the nuclear force has an important role in storing it. To bring the charged protons together against their electric repulsion, energy is required. When the protons and neutrons are bound together by the nuclear force they form a nucleus, this energy is in stored form.
So, the strong forces holding two protons extremely close is strong nuclear forces.
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A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0°c, the volume of the gas is 371 ml. To what temperature must the gas be heated to occupy a volume of 557 ml? report your answer in degrees celcius to the nearest whole number.
The gas must be heated to a final temperature of 137°C in order to fill a volume of 557 ml.
Given,V₁= 371mlV₂ = 557 mlT₁ = 0°C or 273 K
The final gas temperature that has to be heated must be determined.
As long as the cylinder is free to move, the pressure is always 1 atm, or equal to the external pressure.
Consequently, by using Charles Law, we obtain
V₁ / T₁ = V₂ / T₂
where starting and ultimate volumes V1 and V2, respectively T1 and T2 are beginning and ultimate temperatures, respectively (in Kelvin).
The ultimate temperature is as a result
T₂ = V₂ × T₁ / V₁Or, T₂ = 557 x (0+273) / 371Or, T₂ = 410 KOr, T₂ = 137°C.
As a result, the temperature is 137°C at the end.
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1 proton 0 neutrons and is a neutron
Answer: Nuclear fusion
Explanation:
I think
which contains the most amount of energy an aluminum can at 30C or an aluminum can at 20C
Answer:
The can at 30 degrees had more energy.
Explanation:
Since Heat is a type of energy, and the first can (30C) is hotter than the second can (20C) you can see that it has more energy. Energy is related directly to heat.
The aluminum can at 30 degrees had more energy.
What is energy?Energy is defined as using physical or chemical resources to generate power, particularly to provide heat and light or operate machinery. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible. Although energy can take on several forms, it cannot be created or destroyed.
Given that heat is a sort of energy and that the first can is hotter (30C) than the second can (20C), you can infer that the first can has more energy. You need to apply 0.90 J of heat in order to raise the temperature of 1 g of aluminum by 1 C. Under the same circumstances, the temperature of the aluminum varied less than that of the copper.
Thus, the aluminum can at 30 degrees had more energy.
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The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is?
The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is C₆H₇O₃.
The empirical formula gives the proportions of the elements present in a compound.
In this compound proportion od carbon, hydrogen and oxygen atoms is:
n(C) : n(H) : n(O) = 12 : 14 : 6 /÷2; in this example, molecular formula is divided by two
n(C) : n(H) : n(O) = 6 : 7 : 3
In the empirical formula, the proportion od carbon, hydrogen and oxygen atoms is 6 : 7 : 3, so the empirical formula is C₆H₇O₃.
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How many potassium ions are in 5.66 g of potassium sulfate: k2so4 (mw. 174.27 g/mol)?
There would be 3.91 ×10²² potassium ions in 5.66 g of potassium sulfate.
What is a molecule?A molecule is the smallest unit of a substance that retains its composition and properties. It is made up of two or more atoms that are joined together by chemical bonds.
The number of moles of the k2so4 = mass/molecular mass
=5.66 /174.27
=0.032478 moles
The number of the potassium ion in k2so4 = 2 ×0.032478×6.022 ×10²³
=3.91 ×10²² ions
There would be 3.91 ×10²² potassium ions in 5.66 g of potassium sulfate.
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Matter is a substance that has ________.
Answer:
matter is substance that has mass.
Answer: Mass and Volume?
Explanation:
Which factors could influence oxygen saturation measurement?
Multiple factors can affect the accuracy of a pulse oximeter reading, such as
poor circulation skin pigmentation skin thickness skin temperature current tobacco use use of fingernail polish.How to get the best reading from a pulse oximeter?Observe the manufacturer's recommended usage procedures. When you put the oximeter on your finger, make sure your hand is cosy, relaxed, and positioned below the level of your heart.
Remove any nail paint you might have had on that finger. While you are still seated, do not move the location of the pulse oximeter on your body. Wait for the reading to stabilize and display a single number after a brief interval.
If you note your oxygen levels along with the date and time of the reading, you can easily track changes in them and inform your healthcare physician about them. Follow your doctor's recommendations for how often and when to check your oxygen levels.
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What is the classification of an instrument that makes sound from the substance itself?.
The classification of an instrument that makes sound from the substance itself is Idiophones.
What are instruments?Instruments are objects that are used in labs and music classes. They are the main items that help in doing work in those classes and labs. Instruments are made with technical knowledge and help in technical things.
The idiophone is an instrument that produces sound by vibrating the plates of the instrument. Under this, the instrument produces voices by themselves.
Thus, Idiophones are a type of instrument that produces sound using the substance itself.
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How many kinds of chemically non-equivalent hydrogens are there in each of the following compounds?.
There are three non-equivalent sets of hydrogens are there in each of the following compounds.
Hydrogen is the simplest element. Each hydrogen atom has only one proton. Hydrogen is also the most abundant element in the universe. Stars like the Sun are mostly made of hydrogen. The sun is essentially a giant ball of hydrogen and helium gas. Hydrogen water is pure water with extra hydrogen molecules added. Hydrogen (H2) is the most abundant molecule known to man. It is a colorless, odorless, and tasteless gas. In any case, in 2007 a Japanese group discovered that inhaled hydrogen gas could act as a cancer preventive (antioxidant) agent.
Found in the Sun and most stars, Jupiter is composed primarily of hydrogen. Hydrogen is the most abundant form of water on earth. As a gas in the atmosphere, it is present in trace amounts, less than 1 ppm by volume.
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Table sugar has the chemical formula C 12 H 22O 11 what is the ratio of carbon atoms to oxygen atoms in this compound
In this compound, the proportion of carbon atoms to oxygen atoms is 12: 11.
What distinguishes an atom of carbon as such?
The nucleus of a carbon atom is made up of six protons and six neutrons, and it is encased in six electrons. According to quantum physics, the first two electrons must occupy the innermost atomic orbital, while the wavefunctions of the following four electrons only partially fill the second standard and three second principal orbitals.
How are atoms located in a compound?
Calculate the element's molar mass using the periodic table. To determine the atoms, the number of moles, divide the given mass in grams by the molar mass. To get the number of atoms, multiply the number of moles by Avogadro's number.
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Why are the properties of a compound different than the elements that make it up.
The properties of a compound are different than the elements that make it up.
What are properties of a compound ?
Physical and chemical characteristics of compounds allow us to recognize them. A quality that may be observed or measured is referred to as a physical property.
The characteristics of a compound are completely distinct from the characteristics of the constituent elements. Reason: Water is a chemical substance that is a nonflammable, noncombustible liquid. It is made up of two substances: oxygen, which promotes combustion, and hydrogen, a highly flammable gas.
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A student in chm 11500 lab measured the mass of a 250-ml erlenmeyer flask and recorded it as 79. 83 g. She added 10. 00 ml of deionized water from a 25-ml buret to the flask. The mass of the flask plus the water was 89. 82 g. The temperature of the water was 22 °c. What is the calculated volume of the water that the student measured?.
An Erlenmeyer flask is also termed as conical flask and titration flask. Invented in the year 1860. It is made up of glass and plastic. Inventer - Emil Erlenmeyer
Weight of empty erlenmeyel flask = 79.83 g
Weight after addition of water = 89.82 g
Weight of water = 89.82 - 79.83 = 9.99 g
Density of water at 22 deg celcius = 0.99777
Density = mass / volume
Volume = mass / density
= 9.99 g / 0.99777 g/ ml
= 10.01 ml
Calculated volume of water that the student measured is 10.01 ml.
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A manufacturer of bicycles has 4815 wheels, 2305 frames, and 2255 handlebars. (a) How many bicycles can be manufactured using these parts? (b) How many parts of each kind are left over? (c) Which part limits the production of bicycles?
The correct answer is 2255 bicycles. (b) 50 frames left over, 305 wheels left over (c) the handlebars.
A manufacturer of bicycles has 4815 wheels, 2305 frames, and 2255 handlebars.First, each bicycle has 2 wheels, so the total pairs of wheels is 4815/2 = 2507.5.
The total amount of bicycles that the manufacturer can make is equal to the smallest number of a determined part that he has, in this case is 2255.This is because he only has 2255 handlebars, after he makes 2255 bicycles, he runs out of handlebars, and can not make more.then with the parts listed in the problem, the manufacturer can do 2255 bicycles
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What is the hydrogen deficiency index (hdi) for a compound with the molecular formula c9h10o?
Hydrogen deficiency index (HDI) for a compound with the molecular formula C9H10O.
What is Hydrogen Deficiency Index(HDI)?
A "deficit" of H atoms would exist if any of the bonds were replaced with double or triple bonds or if rings were involved. We may determine whether and how many multiple bonds and rings are present from the molecular formula by computing the index of hydrogen deficit (IHD). IHD is also known as Unsaturation Degree.
The compound C9H10O has five pi bonds, which is a count of deficiency.
Thus, HDI for C9H10O is five.
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