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Snezhnost [94]
4 years ago
12

Question 1

Chemistry
1 answer:
Kay [80]4 years ago
5 0

Answer:

1. True.

2. False.

3. True.

Explanation:

1. Mass is simply defined as the quantity of matter present in a body. This means that mass gives us an idea of the amount of matter present in any object or body.

Therefore, the answer to the question is True.

2. Weight of an object is simply defined as the gravitational pull of the earth on an object. This implies that location of the object will greatly influence it's weight as the gravitational pull will varies from place to place. Hence, the weight of the object will differ as the location of the object changes.

Therefore, the answer to the question is False.

3. As defined above mass is the amount of matter present in an object.

The mass of an abject is constant irrespective of the location of the object.

Therefore, the answer to the question is True.

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Answer:

Explanation:

moler mass of Cu is 63.546 g/mol. Since 63.546 g of copper has 6.022 x 10 power(23) atoms (Avogadro's number). = 9.5 x 10(power)21 atoms of copper.

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What is an atomic reaction​
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<u>Explanation:</u>

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  • This atom comprise of electron neutrons and protons.
  • Generally in the atomic reaction, there will be loss or gain of the electron to or from the substance with which the reaction takes place.
  • In default, all atoms wanted to attain the noble gas configuration which is stable in nature. These atoms from the ionic or covalent bond by sharing the electron.

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I believe <span>Na2SO3  is the solution to the problem.</span>
6 0
3 years ago
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Write and balance the equation for the combination of ammonia gas with solid copper (II) oxide to produce copper metal, nitrogen
Katena32 [7]

Explanation :

The balanced chemical reaction will be,

3CuO(s)+2NH_3(g)\rightarrow 3Cu(s)+N_2(g)+3H_2O(l)

By the stiochiometry, 3 moles of solid copper(II)oxide react with 2 moles of ammonia gas to give 3 moles of copper metal, 1 mole of nitrogen gas and 3 moles of liquid water.

The states of matter of each elements and compound is,

Copper(II)oxide is in solid state

Ammonia is in gaseous state

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Answer:

A

Explanation:

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