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castortr0y [4]
3 years ago
11

What is the mass of 3.04×10^-4 mol of baking soda, NaHCO3?​

Chemistry
1 answer:
Zigmanuir [339]3 years ago
8 0

Answer:

0.025536g

Explanation:

no. of mole = mass/Mr

mass = Mr ×  no. of mole

         = [23 + 1 + 12 + 3(16)] × 3.04×10^-4

         = 0.025536g

         = 0.0255g (3 significant figures)

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Ira Lisetskai [31]
^{10}_5 B
An atom of this isotope contains 5 protons and 10-5=5 neutrons.

5 \times 1.6726 \times 10^{-27} + 5 \times 1.6749 \times 10^{-27} = \\
8.363 \times 10^{-27} + 8.3745 \times 10^{-27}= \\
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1.67 \times 10^{-26}

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3 years ago
A graduated cylinder was filled with water to the 25.0 mL mark and weighed. Its mass was 105.5g. An object made of an unknown me
Marta_Voda [28]
The answer <span>is <span>8.9 g/mL</span>.</span>

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6 0
3 years ago
List and describe the three rock types in the rock cycle including two or more processes involved in the formation of each type
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Answer:    The three main rock types are igneous, metamorphic and sedimentary.

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Explanation:

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3 0
2 years ago
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drek231 [11]

Answer: Option (B) is the correct answer.

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6 0
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