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3 years ago

What is the molar mass of BaBr2?multiple choice on the picture

Chemistry

2 answers:

laiz [17]3 years ago

3 0

B. 297.1 g/mol

Is your answer! ;)

Vesna [10]3 years ago

3 0

Answer: Option (B) is the correct answer.

Explanation:

Molar mass is defined as the sum of atomic mass of all the atoms present in a compound.

For example, atomic mass of barium (Ba) is 137.32 g/mol and atomic mass of a bromine atom is 79.90 g/mol.

Therefore, calculate molar mass of $BaBr_{2}$ as follows.

Molar mass = atomic mass of Ba + 2 $\times atomic mass of Br$

= $137.32 g/mol + 2 \times 79.90 g/mol$

= 297.12 g/mol

Therefore, we can conclude that molar mass of $BaBr_{2}$ is 297.1 g/mol.

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Mr. Aguilar has ice on his wrist, literally. If the ice on Mr. Aguilar’s wrist (H2O) weighs 546 grams, how many ice particles ar

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Answer:

The answer to your question is 1.83 x 10²⁵ particles

Explanation:

Data

particles of H₂O = ?

mass of H₂O = 546 g

Process

1.- Calculate the molar mass of Water

Molar mass = (2 x 1) + (1 x 16)

= 2 + 16

= 18 g

2.- Use proportions to find the number of particles. Use Avogadro's number.

18 g ---------------- 6.023 x 10²³ particles

546 g --------------- x

x = (546 x 6.023 x 10²³) / 18

3.- Simplification

x = 3.289 x 10²⁶ / 18

4.- Result

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3 years ago

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3 years ago

A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg. What volume of gas will the bal

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Answer:

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Given ,

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Using above equation as:

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Solving for V₂ , we get:

45.0 L is the volume of gas will the balloon contain at 1.35 atm and 253 K.

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