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4 years ago

What is a temperature scale used by scienctist?

1 answer:

3 0

To measure the kinetic engery from the inside and outside of something to be able to tell how hot or coll something is.. without touching it also

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Under certain conditions, the substance calcium carbonate can be broken down to form calcium oxide and carbon dioxide. If 31.7 g

klio [65]

Answer:

$13.93\ \text{g}$

Explanation:

Molecular weight of $CaCO_3$ = 100.0869 g/mol

Mass of $CaCO_3$ = 31.7 g

Moles of $CaCO_3$ = $\dfrac{31.7}{100.0869}=0.3167\ \text{mol}$

Moles of both $CaO$ and $CO_2$ is $0.3167\ \text{mol}$

Molecular weight of $CO_2$ = 44 g/mol

Mass of $CO_2$ = $44\times 0.3167=13.93\ \text{g}$

The mass of carbon dioxide formed simultaneously is $13.93\ \text{g}$ .

6 0

3 years ago

Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He. W

Alona [7]

Answer:

Mole Fraction of O2 --> 0.42

Mole Fraction of Ar --> 0.037

Explanation:

8 0

3 years ago

select the common word on the outside of a shipping container that will alert you to the fact that the material inside is hazard

Paha777 [63]

The common word on the outside of a shipping container that will alert you to the fact that the material inside is hazardous is caution.

<h3>What are hazardous statements?</h3>

Hazardous statements are those words or phrases that are labelled against chemicals which shows the degree of how dangerous the chemical are.

The common words that are used as hazardous statements which shows that a chemical is dangerous include the following:

Danger,

Caution and

Warning.

Therefore, the common word on the outside of a shipping container that will alert you to the fact that the material inside is hazardous is caution.

Learn more about hazard statements here:

brainly.com/question/2875871

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3 0

2 years ago

which of the following enthalpy diagrams represent exothermic reactions? Endothermic reactions? please state which one each diag

Wittaler [7]

Answer:

a,c and d are exothermic

b is the endothermic

Explanation:

exothermic because energy required to form products is less than the energy required to break bonds in reactants.

endothermic because energy required to form products is larger than the energy required to break bonds in reactants.

5 0

2 years ago

In a chemical, reaction react to form products.Accounding to the law of conservation of matter, if the total mass of the reactan

Olin [163]

Explanation:

293.33he sheidiedbdbd

4 0

3 years ago