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Soloha48 [4]
3 years ago
11

Resistance of a material being scratched in known as

Chemistry
2 answers:
Wittaler [7]3 years ago
3 0
Resistance of a material being scratched in known as: Hardness
ddd [48]3 years ago
3 0

Answer:

Hardness

Explanation:

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A bond where electrons are transferred from a cation to an anion is called a (n) ___________bond.\
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When elements transfer electrons from a cation and an anion it called ionic bond.
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Tectonic activity causes potential energy to build up in the crust. An earthquake occurs when this potential energy is released
4vir4ik [10]

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c. It generates changes in the magnetic field of Earth.

Explanation:

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7 0
2 years ago
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How many grams of zinc phosphate are formed when 48.1 mL of 2.18 M zinc nitrate reacts with excess potassium phosphate?
Roman55 [17]

Answer:

15.4 g of Zn₃(PO₄)₂ are produced

Explanation:

Given data:

Mass of zinc phosphate formed = ?

Volume of zinc nitrate = 48.1 mL (0.05 L)

Molarity of zinc nitrate = 2.18 M

Solution:

Chemical equation:

3Zn(NO₃)₂ + 2K₃PO₄  →   Zn₃(PO₄)₂ + 6KNO₃

Moles of  zinc nitrate:

Molarity = number of moles / volume in litter

Number of moles =  2.18 M × 0.05 L

Number of moles = 0.109 mol

Now we will compare the moles of zinc phosphate with zinc nitrate from balanced chemical equation:

                     Zn(NO₃)₂           :            Zn₃(PO₄)₂

                         3                    :                 1

                       0.109               :               1/3×0.109 = 0.04 mol

0.04 moles of Zn₃(PO₄)₂ are produced.

Mass of Zn₃(PO₄)₂:

Mass = number of moles × molar mass

Mass = 0.04 mol × 386.1 g/mol

Mass = 15.4 g

   

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3 years ago
Which of the following chemical equations represents an oxidation-reduction reaction?
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C. Represents an oxidation-reduction reaction
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Observations are made by using one of the five senses (touch, sight, taste, smell, hearing) to gather information.
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2 years ago
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