3 years ago

Coal and petroleum are useful because the both have ___ stored in them.

Chemistry

2 answers:

Mariana [72]3 years ago

6 0

Answer:

Energy is the answer. I just took the lesson

God bless!

gizmo_the_mogwai [7]3 years ago

5 0

I think the answer is 4 carbon dioxide

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Plz help me : Copper (I) chloride CuCl is made up of:

TEA [102]

C. Metal and Nonmetal

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2 years ago

Why is it so important in an ideal simple experiment to change only one variable from trial to trial?

RideAnS [48]

Because if you change two things then you do not know which one has affected or altered the dependent variable. if you only change one then you know what exactly changed and why

3 0

2 years ago

An ideal gas occupies a volume V at an absolute temperature T. If the volume is halved and the pressure kept constant, what will

Kruka [31]

Answer:

It will be halve of T

Explanation:

V1 = V

T1 = T

V2 = ½V

T2 = x

V1/T1 = V2/T2

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2 years ago

Which reactions are exothermic?

poizon [28]

Answer:

Explanation:

exothermic reactions are the reactions which involve the release of energy.

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4 0

2 years ago

Determine the expected diffraction angle for the first-order diffraction from the (111) set of planes for FCC nickel (Ni) when m

faust18 [17]

Answer:

56°

Explanation:

First calculate $a:$

$a=2 R \sqrt{2}=2(0.1246) \sqrt{2}=0.352 \mathrm{nm}$

The interplanar spacing can be calculated from:

$d_{111}=\frac{a}{\sqrt{1^{2}+1^{2}+1^{2}}}=\frac{0.352}{\sqrt{3}}=0.203 \mathrm{nm}$

The diffraction angle is determined from:

$\sin \theta=\frac{n \lambda}{2 d_{111}}=\frac{1(0.1927)}{2(0.2035)}=0.476$

Solve for $\theta$

$\theta=\sin ^{-1}(0.476)=28^{\circ}$

The diffraction angle is:

$2 \theta=2\left(28^{\circ}\right)=56^{\circ}$

4 0

3 years ago