2 years ago

Which of the following is a unit of mass?

Chemistry

1 answer:

sergij07 [2.7K]2 years ago

7 0

Grams, kilograms, decagrams

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If 20.0 grams of Na reacts with 30.0 gtams of Cl2 what mass of NaCl is produfed by the reaction

IgorLugansk [536]

Answer:

mNaCl = mNa + mCl

mNa = 20g

mCl = mCl2/2 = 30/2 = 15g

mNaCl= 20+15 = 35g

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1 year ago

When zinc nitrate is heated, zinc oxide, nitrogen dioxide(NO2) and oxygen gas are

laiz [17]

Answer:

i) 16.5g of ZnO

ii) 9.8 dm³ of NO2

Explanation:

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2 years ago

Which form of energy is directly related to the measure of the average kinetic energy of the particles in a substance?

timama [110]

Answer:

thermal energy

Explanation:

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2 years ago

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If 10.0 g water at 0.0°C is mixed with 20.0 g of water at 30.0°C what is the final temperature of the mixture?

Bond [772]

Answer:

1.67 gradius Celcius

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

7 0

2 years ago

A solution is prepared by dissolving 2.61 g ethanol (C2H5OH) in 16.2 g water. What is the molality (mol/kg) of C2H5OH in the sol

stiks02 [169]

Answer:

3.50 molal

Explanation:

Molality → Moles of solute / kg of solvent.

Let's convert the solvent's mass from g to kg

16.2 g . 1kg / 1000 g = 0.0162 kg

Let's determine the moles from the solute

2.61 g . 1 mol / 46 g = 0.0567 moles

Molality → 0.0567 mol / 0.0162 kg = 3.50 m

7 0

3 years ago