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e-lub [12.9K]
3 years ago
6

2. Is it true thatOnly the stratosphere contains enough air for living things to breathe?

Chemistry
1 answer:
xenn [34]3 years ago
4 0

Answer:

I'm pretty sure that's false.

Explanation:

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Please help i will give brainliest!!! thank you =)
Anastasy [175]

Answer:

Answer choice B. 2

Explanation:

7 0
2 years ago
What happens chemically when quick lime is added to water?
sineoko [7]

Answer:

CaO + H20 => Ca(OH)2

Explanation:

quick lime ia a oxyde and when it reacts with water it gives hydroxide

5 0
2 years ago
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Which element comes from the greek word zinke?
Novay_Z [31]

Answer:

Zinc

The element was probably named by the alchemist Paracelsus after the German word Zinke (prong, tooth).

Explanation:

8 0
2 years ago
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Which of the following is a physical or chemical characteristic of a mineral?
Rasek [7]
Minerals physical characteristics are hardness,luster,the way it’s solid and chemical would be the way the color changes and it’s density
6 0
2 years ago
0.50 mol A, 0.60 mol B, and 0.90 mol C are reacted according to the following reaction
algol [13]

Reactant C is the limiting reactant in this scenario.

Explanation:

The reactant in the balanced chemical reaction which gives the smaller amount or moles of product is the limiting reagent.

Balanced chemical reaction is:

A + 2B + 3C → 2D + E

number of moles

A = 0.50 mole

B = 0.60 moles

C = 0.90 moles

Taking A as the reactant

1 mole of A reacted to form 2 moles of D

0.50 moles of A will produce \frac{2}{1} = \frac{x}{0.50}

thus 0.50 moles of A will produce 1 mole of D

Taking B as the reactant

2 moles of B reacted to form 2 moles of D

0.60 moles of B reacted to form x moles of D

\frac{2}{2} = \frac{x}{0.6}

x = 2 moles of D is produced.

Taking C as the reactant:

3 moles of C reacted to form 2 moles of D

O.9 moles of C reacted to form x moles of D

\frac{2}{3} = \frac{x}{0.9}

= 0.60 moles of D is formed.

Thus C is the limiting reagent in the given reaction as it produces smallest mass of product.

5 0
3 years ago
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