CHEMISTRY COLLEGE

HELPP GIVING AWAY 30 POINTS!!!!!Determine Your family wants to use
renewable energy to heat your home. Which
renewable energy resource is best suited to
your area? Explain your answer.

Answers

Answer 1

Answer:

Answer:

wood

Explanation:

i can take the seds from the trees to row new trees and still use the wood without causing deforestation

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the reaction A->B is second order in A and the rate constant is 0.039L/mol s. if it took 23 sec for the concentration of A to decrease to 0.30 M, what was the starting concentration of A

Answers

Answer:

0.41 M

Explanation:

A -> B

rate constant (k) = 0.039L/mol s

t = 23

Final concentration, [A] = 0.30M

Initial concentration, [A]o = x

1 / [A] = kt + 1 / [A]o

1 / [A]o = 1 / [A] - kt

1 / [A]o = 1 / 0.30 - 0.039 (23)

1 / [A] = 3.33 - 0.897 = 2.433

[A] = 0.41 M

When a solution of an acid reacts with a solution of a base, hydrogen ions react with hydroxide ions to form?

Answers

water
hydrogen ions+hydroxide=water
which can be verified by dark reaction of photosynthesis

Answer:

water and salt

Explanation:

In the FLVS salt will be your answer but technaically when a acid reacts with a base it can create salt and water

A 6.13 g sample of an unknown salt (MM = 116.82g/mol) is dissolved in 150.00 g water in a coffee cup
calorimeter. Before placing the sample in the water, the
temperature of the salt and water is 23.72°C. After the
salt has completely dissolved, the temperature of the
solution is 28.54°C.

If 3.15 x 10J of heat was gained by the solution, what
is the total heat for the dissolution reaction of the 6.13 g
of salt?

Answers

According to law of conservation of energy, if 31.5 J of heat is gained than same amount of heat is lost .

What is law of conservation of energy?

According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1812.

Learn more about law of conservation of energy,here:

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Answer:

-3.19x10³ J

Explanation:

Since the surroundings absorbed 3.19 × 10³ J (or 3190 J) of heat, the system, or the dissolution reaction, must have lost the same amount of heat. The heat for the system, then, is -3.19 × 10³ J (or -3190 J). We know this is true because of the first law of thermodynamics, "heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy".

What is the daughter nucleus produced when 63 Zn undergoes electron capture? Replace each question mark with the appropriate integer or symbol.

Answers

Answer: The daughter nuclei is $_(29)^(63)\textrm{Cu}$

Explanation:

Electron capture is defined as the process in which an electron is drawn to the nucleus where it combines with a proton to form a neutron and a neutrino particle.

$_Z^A\textrm{X}+e^-\rightarrow _(Z-1)^A\textrm{Y}+\gamma e$

The chemical equation for the reaction of electron capture of Zinc-63 nucleus follows:

$_(30)^(63)\textrm{Zn}+e^-\rightarrow _(29)^(63)\textrm{Cu}+\gamma e$

The parent nuclei in the above reaction is Zinc-63 and the daughter nuclei produced in the above reaction is copper-63 nucleus.

Hence, the daughter nuclei is $_(29)^(63)\textrm{Cu}$

Final answer:

When Zinc-63 undergoes electron capture, it results in the creation of a Copper-63 daughter nucleus. This is due to the atomic number decreasing by one (from 30 to 29) during electron capture, but the mass number remaining unchanged.

Explanation:

Electron capture is a process where a proton-rich nucleus absorbs an inner shell electron, which results in a conversion of a proton into a neutron, and the emission of an electron neutrino. In doing so, the atomic number decreases by one, while the mass number stays the same. Therefore, in the case of 63 Zn (zinc-63), the atomic number is 30 prior to electron capture. After electron capture, the atomic number will decrease by one to become 29, leading to the production of 63 Cu (copper-63).

Remember that the atomic number (bottom number), also known as the proton number, determines the element. Therefore, in our example, Zn changes to Cu. The fact that the mass number (top number) remains the same is due to the total number of protons and neutrons (nucleons) being conserved.

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I need soon this is due at 10:30 pm its curently 6:00 pm
What is parasitism?

Answers

Answer:

the practice of living as a parasite in or on another organism.

Hope this HELPS!!!

Explanation:

A patient has been diagnosed with mitochondrial disease and is experiencing the following symptoms: fatigue (lack of energy)and muscle weakness. Which organelles (cell parts) would NOT likely be immediately responsible for these symptoms? select all that apply. Mitochondria,Chloroplast, Lysosome,and Cytoplasm.NEED HELP ASAP