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yaroslaw [1]
3 years ago
5

. FAST PLEASE HELP Which of the following is true about ALL energy transformations?

Chemistry
1 answer:
olga2289 [7]3 years ago
4 0

Answer:

Energy is never lost, it just changes from one form to another

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during a neutralization reaction phosphoric acid reacts with potassium hydroxide to produce potassium phosphate and water. if th
Otrada [13]

During a neutralization reaction phosphoric acid reacts with potassium hydroxide to produce potassium phosphate and water, the reaction occurs with a 64.9% yield.

A neutralization reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products. In a neutralization process, a mixture of H+ ions and OH- ions results in the formation of water.

Potassium phosphate and water are created when potassium hydroxide and phosphoric acid combine. The reaction's balanced equation is as follows: K3PO4(aq) + 3H2O = 3KOH(aq) + H3PO4(aq) (l) If six moles of potassium hydroxide react, phosphoric acid is used in the reaction.

To learn more about neutralization reaction please visit -
brainly.com/question/26786272
#SPJ1

5 0
2 years ago
Consider the following equivalent expressions: 38÷1312 and 38?ab What are the values of a and b? Enter the value of a followed b
Anna007 [38]

Answer:

a = 12

b = 13

Explanation:

Consider the following equivalent expressions: 38÷1312 and 38?ab What are the values of a and b? Enter the value of a followed by the value of b, separated by a comma.

The solution is attached.

3 0
4 years ago
2. The hydrogen and oxygen atoms chemically bond to form the
olasank [31]

Answer:

True.

Explanation:

hydrogen and oxygen=water or hydrogen oxide

H+O2=H2O.

5 0
3 years ago
Analysis of a rock sample shows that it contains 6.25% of its original uranium-235. How old is the rock? How do you know?
nadya68 [22]

Answer:

2.82\cdot 10^9 y

Explanation:

A radioactive isotope is an isotope that undergoes nuclear decay, breaking apart into a smaller nucleus and emitting radiation during the process.

The half-life of an isotope is the amount of time it takes for a certain quantity of a radioactive isotope to halve.

For a radioactive isotope, the amount of substance left after a certain time t is:

m(t)=m_0 (\frac{1}{2})^{\frac{t}{\tau}} (1)

where

m_0 is the mass of the substance at time t = 0

m(t) is the mass of the substance at time t

\tau is the half-life of the isotope

In this problem, the isotope is uranium-235, which has a half-life of

\tau=7.04\cdot 10^8 y

We also know that the amount of uranium left in the rock sample is 6.25% of its original value, this means that

\frac{m(t)}{m_0}=\frac{6.25}{100}

Substituting into (1) and solving for t, we can find how much time has passed:

t=-\tau log_2 (\frac{m(t)}{m_0})=-(7.04\cdot 10^8) log_2 (\frac{6.25}{100})=2.82\cdot 10^9 y

5 0
4 years ago
Chemical formula for Sn+4 O-2
Assoli18 [71]
The chemical formula is SnO2
6 0
3 years ago
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