2 years ago

Someone please help me dont scroll i need help

Chemistry

1 answer:

Diano4ka-milaya [45]2 years ago

8 0

A line that stay s straight across the graph

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3. What measurement unit is used to measure molecules

lakkis [162]

Answer: It is Mole.

Explanation:

Mole is the SI unit of measurement used to measure the number of things, usually atoms or molecules. One mole of something is equal to 6.02214078×1023 of same things (Avogadro's number).

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3 years ago

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A reaction between liquid reactants takes place at −10.0°C in a sealed, evacuated vessel with a measured volume of 45.0L. Measur

maks197457 [2]

Answer: 0.0624 atm

Explanation:-

According to the ideal gas equation:

$PV=nRT$

P = Pressure of the gas = ?

V= Volume of the gas = 45.0 L

T= Temperature of the gas = -10.0°C = 263 K $0^00C=273K$

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas

Moles of gas= $\frac{\text{ given mass}}{\text{ molar mass}}= \frac{19.0g}{146g/mole}=0.130moles$

$P=\frac{nRT}{V}=\frac{0.130\times 0.0821\times 263}{45.0}=0.0624atm$

The pressure of sulfur hexafluoride gas in the reaction vessel after the reaction is 0.0624 atm

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2 years ago

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GalinKa [24]

You should do which candle burn the fastest colored or white

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3 years ago

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for the reactants represented by the equation 2H2 + O2 > 2H2O, how many grams of water are produced from 376.97 mol of hydrog

Hunter-Best [27]

Answer:

6792.1 g

Explanation:

Dimensional analysis:

376.92 mol H2 * (2 mol h2o / 2 mol h2) * (18.02g h2o / 1 mol h2o)

6792.1 g

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3 years ago

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What volume of sample, in mL, would be needed to make 2 mL of a 5-fold dilution? (3 significant figures needed)

natulia [17]

Answer:

0.400 mL

Explanation:

Hello, the dilution factor (in folds) is given by:

$folds=\frac{total_{volume}}{sample_{volume}}$

Thus, the sample volume with three significant figures is given by:

$sample_{volume}=\frac{2mL}{5"folds"}=0.400 mL$

Best regards.

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3 years ago