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Len [333]
3 years ago
15

What happens when a solid turns straight into a gas?

Chemistry
1 answer:
LiRa [457]3 years ago
5 0

Answer:

The atoms are separating, and sublimation is happening.

Explanation:

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If 6.96 mol of C 5 H 12 reacts with excess O 2 , how many moles of CO 2 will be produced by the following combustion reaction? C
kati45 [8]

Answer:

34.8 moles of CO₂ are produced

Explanation:

This is the reaction:

1C₅H₁₂ + 8O₂  →  6H₂O  +  5CO₂

Ratio is 1:5. We make a rule of three

1 mol of pentane can produce 5 moles of CO₂

Then, 6.96 moles of pentane may produce (6.96 .5) / 1 = 34.8 moles

7 0
4 years ago
Is density defined as the volume in a given mass orthe mass in a given volume?​
wariber [46]

Answer:

mass in a given volume

Explanation:

Density is the mass in a given volume or mass per unit volume of a substance.

Mass is defined by the amount of matter present in a substance.

Volume is the space occupied by a body.

  • Density is the mass divided by the volume

Mathematically;

                      Density  = \frac{mass}{volume}  

 

3 0
3 years ago
Galaxies are composed of many different objects. What kind ok objects make up most of the visible matter in a galaxy?
Arte-miy333 [17]
Stars make up most of the visible matter
5 0
3 years ago
Read 2 more answers
The picture below is a great example of __________ biodiversity.
ss7ja [257]
Low because it is not diverse. It is just seed corn.
6 0
3 years ago
What element is being oxidized in the following redox reaction?
DIA [1.3K]

Answer:

The element that has been oxidized is the N

Explanation:

Zn²⁺(aq) + NH₄⁺(aq) → Zn(s) + NO₃⁻(aq)

See all the oxidation states:

Zn²⁺  → acts with +2

In ammonia, H acts with +1 and N with -3

Zn(s), acts with 0. In all the elements in ground state, the oxidation state is 0.

Zn changed from 2+ to 0. The oxidation number, has decreased.

This element has been reduced.

NO₃⁻ (aq) it's a ion, from nitric acid.

N acts with +5

O acts with -2

The global charge is -1

The N, has increased the oxidation state, so this element is the one oxidized.

8 0
3 years ago
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