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3 years ago

Fill in the blanks

Chemistry

1 answer:

stellarik [79]3 years ago

4 0

Wind and weathering

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Help and fast .....................

Alex Ar [27]

What do you need help with exactly can you explain ? I think I understand what you mean cause I just had this assignment in chemistry

8 0

3 years ago

Read 2 more answers

Perform the calculation and report the answer using the proper number of significant figures. Make sure the answer is rounded co

shusha [124]

This question is an incomplete question, here is a complete question.

Perform the following calculation. Report the answer using the proper number of significant figures.

$\frac{1.012\times 10^{-3}J}{(0.025456g)\times (298.3682-298.3567)K}=?$

Answer : The answer will be, $3.46J/g.K$

Explanation :

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule apply for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The rule apply for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

The given expression is,

$\frac{1.012\times 10^{-3}J}{(0.025456g)\times (298.3682-298.3567)K}$

$\frac{1.012\times 10^{-3}J}{(0.025456g)\times (0.0115)K}$

$\Rightarrow 3.4569J/g.K$

In the given expression, 1.012 has 4 significant figures, 0.025456 has 5 significant figures and 0.0115 has 3 significant figures. From this we conclude that 3 is the least significant figures in this problem. So, the answer should be in 3 significant figures.

Thus, the answer will be $3.46J/g.K$

7 0

3 years ago

In the electron cloud model, if you begin at the electron shell closest to the nucleus of an atom and move out, what is the numb

Serga [27]

Option B: 2, 8, 18, 32.

2 in the K shell, 8 in L shell, 18 in M shell and 32 in N shell.

8 0

3 years ago

12. What is the main cause of movement of water in oceans?

Artemon [7]

Answer:

i think it's convection

3 0

3 years ago

650.J is the same amount of energy as? 2720cal 1550cal 650.cal 2.72cal

Oksi-84 [34.3K]

Ans: 650 J = 155 calories

Given:

Energy in joules = 650 J

To determine:

The energy in calories

Explanation:

1 joule = 0.2388 calories

Therefore, 650 joules = 0.2388 calories * 650 J/1 J = 155 calories

4 0

4 years ago

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