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Novosadov [1.4K]
3 years ago
14

Explain the change in mass that occurs when the following substances are separately heated in open crucibles

Chemistry
1 answer:
aleksandrvk [35]3 years ago
7 0

Answer:

your answer is (a) Copper Metal

Explanation:

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Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: ()zn
Bingel [31]

Based on the chemical equation, to balance the equation we use 2 as a coefficients of HCl on left hand side of reaction.

<h3>What is balanced equation?</h3>

Balanced chemical equations are those equation in which each entities are present in same amount on left side as well as on the right side of the chemical reaction.

Given chemical reaction is:

Zn + HCl → ZnCl₂ + H₂

Above reaction is not balanced equation as number of chlorine and hydrogen atoms are not same, so balanced equation will be:

Zn + 2HCl → ZnCl₂ + H₂

Hence we add 2 as a coefficient of HCl to balance the equation.

To know more about balance equation, visit the below link:
brainly.com/question/26694427

8 0
2 years ago
PLEASE HELP ASAP! very much appreciated
soldier1979 [14.2K]

Answer:

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2 years ago
Silicon is used in computers. Give reasons.<br>​
Amanda [17]

Answer:

Silicon is the basic material used to make computer chips, transistors, silicon diodes and other electronic circuits and switching devices because its atomic structure makes the element an ideal semiconductor.

3 0
3 years ago
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What else is produced during the replacement reaction of silver nitrate and potassium sulfate?
Hatshy [7]

Answer: I think this is it. I really havnt done science/Chemistry  in a while.

2KNO3

Explanation:

5 0
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To make a 6.50M solution, how many moles of solute will be needed if 12.0 liters of solution are required
avanturin [10]

Answer:

78 moles of the solute

Explanation:

From the question;

  • Molarity of the solution is 6.50 M
  • Volume of the solution is 12.0 L

We want to determine the number of moles needed

We need to know that;

Molarity = Number of moles ÷ Volume

Therefore;

Number of moles = Molarity × Volume

Hence;

Number of moles = 6.50 M × 12.0 L

                             = 78 moles

Thus, the moles of the solute needed is 78 moles

8 0
3 years ago
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