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Firlakuza [10]
4 years ago
15

Define a catalyst. [2 marks]​

Chemistry
1 answer:
svp [43]4 years ago
6 0

Answer:

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change

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A 15.0 mL sample of a liquid has a mass of 12.3 g. What is the density of the liquid? A. 0.820g/mL B. 1.22g/mL C. 185g/mL D. 12.
MariettaO [177]

Answer: Option A. 0.820g/mL

Explanation:

Mass = 12.3 g

Volume = 15mL

Density = Mass /volume

Density = 12.3/15 = 0.82g/mL

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3 years ago
The direction of gas movement is determined by _____. partial pressure differences temperature size of the gas molecule ph solub
Mariulka [41]
Partial pressure differences
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Find the number of chromium ions in 3.5 mol of chromium ions.
Ray Of Light [21]

Answer:

2.1 x 10^24 Cr ions

Explanation:

You  need to multiply the 3.5 mol by the Avogrado's number (6.022 x 10^23) to get your answer.

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3 years ago
Molten lava from a volcano includes pockets of gases. A sample of lava contains 0.75 L of water vapour at 1170°C. What volume wi
Lesechka [4]

Charle's law states the relationship between the temperature and the volume of the gas. The final volume occupied at 120 °C is 0.20 L.

<h3>What is Charle's law?</h3>

Charle's law is the ideal gas law that states the relationship between the volume of the gas occupied at a temperature.

Given,

V1 = 0.75 L

T1 = 1443 .15 K

T2 = 393.15 K

The final volume is calculated as:

(V1 × T2) ÷ T1

= 0.75 × 393.15 ÷ 1443.15

= 0.20 L

Therefore, 0.20 L is the final volume.

Learn more about Charle's law here:

brainly.com/question/14517633

#SPJ1

4 0
2 years ago
What does it mean if a trait is inherited
SashulF [63]

Answer:

An inherited trait is one that is genetically determined. Inherited traits are passed from parent to offspring according to the rules of Mendelian genetics.

Explanation:

6 0
3 years ago
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