CHEMISTRY HIGH SCHOOL

Is the osmosis egg challenge a chemical reaction? If so, was the stored energy in the reactants released (exothermic) or absorbed (endothermic) during this physical change?
If not, was energy released (exothermic) or absorbed (endothermic) by the molecules during this physical change?

Answers

Answer 1

Answer:

Answer:

Answer is C because in exothermic reactions, energy releases.

in Cellular respiration,

ATP+H20 (water) = ADP+ Pi + Energy

So celullar respiration is exothermic and releases energy

Answer 2

Answer:

Answer:

yes it is

Explanation:

because what ever you mix in it it would explode and give a chemical reaction

Related Questions

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Nitrogen gas has the chemical formula N2. One molecule of nitrogen gas is made up ofA. one atom of nitrogen and one atom of oxygen.B. two atoms of nitrogen and one atom of oxygen.C. two atoms of nitrogen.D. one atom of nitrogen.
2PESWhat is the correctly rounded answer of thee following calculation:23.7 / 4.9 =?0 4.80450 4.84O 4.83
Environmental science is the study of

Which family (group) of elements rarely forms chemical bonds with other elements?a. nonmetals
b. noble gases
c. halogens
d. metals

Answers

Noble gases is the answer, I learned it in Chemisty class. Hope I helped :)

What is locked up carbon dioxide

Answers

Basically it means carbon dioxide is removed from the atmosphere and is trapped in e.g. calcium carbonate (like shells), rocks, oceans etc.

Which of the following types of organelles are most important in providing a cell with energy

Answers

Mitochondria are the most important because they released the energy stored in food

I hope that's help you !

Final answer:

Mitochondria are the organelles that provide a cell with energy through ATP production via cellular respiration.

Explanation:

The organelles that are most important in providing a cell with energy are the mitochondria.

Within the mitochondria, ATP (adenosine triphosphate) is produced, which is the energy currency of the cell.

By undergoing cellular respiration, mitochondria produce ATP through oxidative phosphorylation, generating energy for various cellular processes.

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When double-stranded DNA is heated at neutral pH, which change does not occur? A) The absorption of ultraviolet (260 nm) light increases.
B) The covalent N-glycosidic bond between the base and the pentose breaks.
C) The helical structure unwinds.
D) The hydrogen bonds between A and T break.
E) The viscosity of the solution decreases.

Answers

Answer:

B) The covalent N-glycosidic bond between the base and the pentose breaks

Explanation:

When forces that bind 2 DNA strands are broken, these strands finally split. This process is called denaturalization

The main forces that remain both DNA strands together are the hydrogen bonds (physical forces), between pair of bases (Adenine with Thymine, and Guanine with Cytosine)

Denaturalization may occur by different factor: Ph alteration, salt addition, temperature (heating), etc

When heating a DNA solution, denaturalization process may be followed using UV absorption (normally, at wavelength of 260 nm): when DNA (double strand) has its regular structure, UV light absorption is low, as the nitrogen bases are stacked like a pile of coins, for which structure absorbs less light

When DNA structure is denaturalized, these nitrogen bases are exposed, and UV absorption increases

Also, DNA denaturalization may be followed by viscosity: for a double strand DNA solution, viscosity is high due to double chain stiffness but when strands are denaturalized, simple strands solution are less viscous (so viscosity decreases over time, when heating the solution)

Lastly, when solution is heated, only physical forces are broken (hydrogen bonds) and not chemical bonds (such as covalent bonds), for which extreme conditions are needed

Name the following compound: 2-ethyl-4-methylheptene 3,5-dimethyl-2-octene 2-ethyl-4-methylheptane 3-methyl-5-propyl-2-hexene

Answers

Answer:

3,5-dimethyl-2-octene

Explanation:

The parent chain will be choosen based on the highest value. In this case, if we count from top to bottom, we'll get seven carbon, however if we count from the second carbon, going left and then down, we'll get eight carbon. So the parent chain is octene

The double bond is located at the second carbon and the methyl groups are located on carbon 3 & 5. Since there are two methyl groups, we add di- in front of methyl to indicate two methyl groups present.

Note: The functional group has to be prioritise and it needed to be a part of the parent chain. In this case, the functional group is the double bond. (alkene)

Final answer:

The compounds are named as 2-ethyl-4-methylheptene, 3,5-dimethyl-2-octene, 2-ethyl-4-methylheptane and 3-methyl-5-propyl-2-hexene based on the IUPAC nomenclature rules for organic compounds.

Explanation:

The compounds presented in your question are named based on the rules of the International Union of Pure and Applied Chemistry (IUPAC), which are used for organic compounds. Here are their names:

2-ethyl-4-methylheptene - This is a heptene with methyl and ethyl groups on the 2nd and 4th carbon atoms.
3,5-dimethyl-2-octene - This is an octene with two methyl groups on the 3rd and 5th carbon atoms.
2-ethyl-4-methylheptane - This is a heptane with ethyl and methyl groups on the 2nd and 4th carbon atoms.
3-methyl-5-propyl-2-hexene - This is a hexene with a methyl group on the 3rd carbon atom and a propyl group on the 5th carbon atom.

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How many grams of calcium bromide are in 50.0 mL of a 0.25 M calcium bromide solution?

Answers

The mass of the compound can be calculated by the molarity. The mass of the calcium bromide in the given solution is 2.5 g.

The mass of the given compound can be calculated by the molarity formula,

$\bold {M = \frac {w}{m* v} * 1000}\n\n\bold {w = \frac {M* m* v}{ 1000}}$

Where,

M- molarity of the solution = 0.25 M

w - given mass =?

m -molar mass of Calcium bromide = 200 g/mol

v-volume in mL= 50 mL

Put the values in the formula,

$\bold {w = \frac {0.25* 200* 50}{ 1000}}\n\n\bold {w = 2.5\ g}$

Therefore, the mass of the calcium bromide in the given solution is 2.5 g.

To know more about Molarity,

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$C_(m)=(n)/(V_(r))\n\nm=(m)/(M)\n\nC_(m)=(m)/(MV_(r)) \ \ \ \ \Rightarrow \ \ \ \ m=C_(m)MV_(r)}\n\nC_(m)=0.25(mol)/(L)\nM_{CaBr_(2)}=200(g)/(mol)\nV_(r)=50mL=0.05L\n\nm=0.25(mol)/(L)*200(g)/(mol)*0.05L= \emph{\textbf{2.5g}}$