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Goryan [66]
2 years ago
10

What is the mass of 4.2 mol of the element iron (Fe)?Answer in units of g.

Chemistry
1 answer:
lbvjy [14]2 years ago
8 0

Answer:

2.35 *10^2 g

Explanation:

4.2 mol Fe *55.845 g/1 mol = 234.549 > 2.35 *10^2 g

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Which product of prime polynomials is equivalent to 36x3 – 15x2 – 6x?
monitta
The product of prime polynomials is equivalent to 36x3 – 15x2 – 6x is letter B which is 3x(3x – 2)(4x 1). Below is the solution. 

3x(3x - 2) (4x + 1)
= 9x2 - 6x (4x + 1)
= 36x3 + 9x2 + -  24x2 - 6x
= 36x3 - 15x2 - 6x
       
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3 years ago
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Which statement is an opinion?
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C. or A. Is your best bet

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An igneous rock that _____ is made of really small mineral crystals. A. cools rapidly B. crystallizes slowly C. undergoes extrem
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Answer: An igneous rock that cools rapidly is made of really small mineral crystals.

Explanation:

The layers inside the earth are hot enough to melt a rock. The liquid or molten rock is known as magma.

When a molten rock cools and solidifies, it results in the formation of an igneous rock.

The slow cooling of magma will result in the formation of an igneous rock with large crystals. Whereas, rapid cooling of lava will result in the formation of an igneous rock with small crystals.

Thus, it can be concluded that an igneous rock that cools rapidly is made of really small mineral crystals.


6 0
3 years ago
Which salt is produced when copper oxide reacts with hydrochloric acid?
Brilliant_brown [7]
It forms copper chloride
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1. How many moles of CO2 can be produced from a reaction of 10.0 moles CzHg?
mr_godi [17]

Answer:

20 moles of CO2 can be produced from a reaction of 10.0 moles C2H6

Explanation:

In this reaction -

2 moles of C₂H6 produces four molecules of Carbon dioxide (CO2)

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Thus, 10 moles of C₂H6 will produce 2 * 10 = 20 moles of Carbon dioxide (CO2)

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3 years ago
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