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Mumz [18]
3 years ago
10

Below is a list of substances. Some are mixtures and some are not. Select all of the substances which are homogeneous.

Chemistry
1 answer:
Papessa [141]3 years ago
6 0

B the atmosphere

D. gasoline

C. a carbonated soft drink (without bubbles)


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Uses of carbon dioxide.​
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Explanation:

used in fire extinction, blasting rubber, foaming rubber and plastic

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How do you solve for the Atomic Mass in chemistry?
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Hydrazine, N2H4, may react with oxygen to form nitrogen gas and water.
Sindrei [870]

Answer:

The percent yield of the reaction is 35 %

Explanation:

In the reaction, 1 mol of hydrazine reacts with 1 mol O₂ to produce 1 mol of nitrogen and 2 moles of water.

Let's verify the moles that were used in the reaction.

2.05 g . 1mol/ 32 g = 0.0640 mol

In the 100% yield, 1 mol of hydrazine produce 1 mol of N₂ so If I used 0.0640 moles of reactant, I made 0.0640 moles of products.

Let's use the Ideal Gases Law equation to find out the real moles of nitrogen, I made (real yield).

1atm . 0.550L = n . 0.082 . 295K

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Percent yield of reaction = (Real yield / Theoretical yield) . 100

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2 years ago
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what conclusions can be made about the relationship between metallic character and the atomic radius?
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We have to get the relationship between metallic character and atomic radius.

Metallic character increases with increase in atomic radius and decrease with decrease of atomic radius.

If electrons from outermost shell of an element can be removed easily, that atom can be considered to have more metallic character.

With increase in atomic radius, nuclear force of attraction towards outermost shell electron decreases which facilitates the release of electron.

With decrease in atomic radius, nuclear force of attraction towards outermost shell electrons increases, so electrons are hold tightly to nucleus. Hence, removal of electron from outermost shell becomes difficult making the atom less metallic in nature.

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I need help on this question
Deffense [45]
B. I’m sorry if I’m wrong ! Wasn’t sure about this question .
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