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3 years ago

How many moles of mercury are equivalent to 3.46 x 1023 atoms?

Chemistry

1 answer:

olga55 [171]3 years ago

4 0

Answer:

3.02 X1023 atoms Ag limol. - - 0.50 1 moles. 6.02241023 atoms.

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A mixture contains NaHCO3 together with unreactive components. A 1.54 g sample of the mixture reacts with HA to produce 0.561 g

Marianna [84]

Answer:

69.55 (w/w) %

Explanation:

When NaHCO3 reacts with an acid HA, the reaction that occurs is:

NaHCO3 + HA → H2O + NaA + CO2

Where 1 mole of NaHCO3 produce 1 mole of CO2

Thus, we need to convert the mass of CO2 to moles using its molar mass (44g/mol). Then, based on the chemical equation, moles of CO2 produced are equal to moles of NaHCO3 in the mixture. With its molar mass -84g/mol- we can find the mass of NaHCO3 and mass percent:

Moles CO2:

0.561g * (1mol / 44g) = 0.01275 moles CO2 = Moles NaHCO3.

Mass NaHCO3:

0.01275 moles * (84g/mol) = 1.071g NaHCO3

Mass percent:

1.071g NaHCO3 / 1.54g sample * 100

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3 years ago

How do i make a friend?

Diano4ka-milaya [45]

Ask someone to be your friend. If they dont want to be your friend then ask someone else.

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3 years ago

Read 2 more answers

I need help with that question please help me I really need it so much I been struggling and stressing a lot please it is due to

s2008m [1.1K]

Answer:

5000*C abd 1.5 million atmospheres

6 0

3 years ago

At standard temperature and pressure. 0.500 mole of xenon gas occupies

ANEK [815]

Answer:

0.500 mole of Xe (g) occupies 11.2 L at STP.

General Formulas and Concepts:

Gas Laws

STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

Stoichiometry

Mole ratio
Dimensional Analysis

Explanation:

Step 1: Define

Identify.

0.500 mole Xe (g)

Step 2: Convert

[DA] Set up: $\displaystyle 0.500 \ \text{mole Xe} \bigg( \frac{22.4 \ \text{L Xe}}{1 \ \text{mole Xe}} \bigg)$
[DA] Evaluate: $\displaystyle 0.500 \ \text{mole Xe} \bigg( \frac{22.4 \ \text{L Xe}}{1 \ \text{mole Xe}} \bigg) = 11.2 \ \text{L Xe}$

Topic: AP Chemistry

Unit: Stoichiometry

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2 years ago

Please help me with this

Sophie [7]

Answer:

5.0 38 84.0 749.7 528.0 729.0 738.9 739.0

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2 years ago