2 years ago

What is 0.0745 in scientific notation?

Chemistry

2 answers:

zaharov [31]2 years ago

8 0

Hi! Here's the answer!

7.45E2 OR 7.45* $10^{-2}$

(im pretty sure im correct, so if you'd like please give me brainly :D)

katen-ka-za [31]2 years ago

4 0

Answer:

7.45 × 10 $^{-2}$

Explanation:

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Calculate the number of atoms of bromine in 1.37 g of bromine. Give your answer in scientific notation. Enter your answer in the

steposvetlana [31]

<u>Answer:</u> The number of atoms of bromine present in given number of mass is $1.03\times 10^{22}$

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of bromine = 1.37 g

Molar mass of bromine = 79.904 g/mol

Putting values in above equation, we get:

$\text{Moles of bromine}=\frac{1.37g}{79.904g/mol}=0.0171mol$

According to mole concept:

1 mole of an element contains $6.022\times 10^{23}$ number of atoms.

So, 0.0171 moles of bromine will contain = $0.0171\times 6.022\times 10^{23}=1.03\times 10^{22}$ number of bromine atoms.

Hence, the number of atoms of bromine present in given number of mass is $1.03\times 10^{22}$

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The molar mass of cadnium chloride is 183 g. If 300 mL of a solution contains 18.3 g CdCl2, the molarity of the solution is:

zavuch27 [327]

Answer:

E. (None of these).

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Suppose a student completes an experiment with an average value of 2.6 mL and a calculated standard deviation of 0.80 mL. What i

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Explanation:

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2 years ago