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krek1111 [17]
3 years ago
12

What is true about energy in an ordinary chemical reaction? Energy is

Chemistry
2 answers:
Lisa [10]3 years ago
4 0
The answer is statement #3.
AlekseyPX3 years ago
3 0
Energy is not created or destroyed
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How is mass calculated given density and volume?
KonstantinChe [14]

Taking into account the definition of density, mass can be calculated as the multiplication between density and volume.

<h3> Density</h3>

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

<h3>Mass given density and volume</h3>

In this case, you know the density and volume of a compound.

From the definition of density, you can calculate mass as follows:

<u><em>mass= density ×volume</em></u>

In summary, mass can be calculated as the multiplication between density and volume.

Learn more about density:

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4 0
2 years ago
What type of front is depicted here? (60 Points)
Arisa [49]

Answer:

Warm is the correct answer

Explanation:

5 0
3 years ago
Read 2 more answers
Why should scientists be able to replicate an investigation?
Ivenika [448]

Answer:

C

Explanation:

It is also better so scientists know that the data is accurate and that the results will be reliable. If an investigation is replicable, somebody else can use it. In order for others to achieve the same results scientists also have to be able to collect the same data ...

6 0
3 years ago
Why was Newland’s periodic table rejected?
Rina8888 [55]
He put iron with sulfur and oxygen and it had a few more errors and iron is a metal the other two are nonmetals

5 0
3 years ago
Calculate the ratio of naf to hf required to create a buffer with ph = 4.05.
NARA [144]
PH is the test of acidity or basicity of a solution. it follows the formula: 
pH = pKa + log [salt] / [acid] where NaF is the salt and HF is the acid in this case. 

By literature, Ka of HF is 3.5*10^-4 
<span>pKa= -log(Ka)=</span><span> 3.46 </span>

<span>pH = pKa + log [NaF / [HF] </span>

4.05 = 3.46 + log [NaF / [HF] 

log [NaF / [HF]<span> = 0.59
</span>
[NaF / [HF] = 3.89
4 0
4 years ago
Read 2 more answers
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