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makkiz [27]
3 years ago
8

Help plz? Thanks! (its a science question).

Chemistry
1 answer:
Ivahew [28]3 years ago
5 0
It would be B. The water evaporates to become water vapor.
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umka2103 [35]
B. Electricity
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3 years ago
Determine the mass of copper that has the same number of atoms as there are in 6.95 mg of potassium. Answer in units of mg.
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Find the mass of 0.235 moles of SiO2? (NOTE: use correct significant figures!)
marta [7]

Answer: 14.1g

Explanation:

Given that,

number of moles of SiO2 = 0.235 moles

Mass in grams = Z (let unknown value be Z)

Molar mass of SiO2 = ?

To get the molar mass of SiO2, use the atomic mass

Silicon = 28g;

Oxygen = 16g

i.e Molar mass of SiO2 = 28g + (16g x 2)

= 28g + 32g

= 60g/mol

Now, apply the formula

Number of moles = Mass / molar mass

0.235 moles = Z / 60g/mol

Z = 0.235 moles x 60g/mol

Z = 14.1 g

Thus, the mass of SiO2 is 14.1 grams.

8 0
3 years ago
Given the unbalanced equation: PbCl₂ + Na₂CrO₂ ---> PbCrO₂ + NaCl. When properly balanced, the sum of the balancing coefficie
Veronika [31]

Answer:

A. 2

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3 0
3 years ago
Come up with 2 examples of derived units from everyday life.
kirill115 [55]

Answer:

answer

Explanation:

Area : Square Meters,

Volume : Cubic Meters,

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