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2 years ago

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Use the table to answer the questions. What is the fastest time trial for the first quarter checkpoint? What is the slowest time

trial for the first quarter checkpoint? What is the range of times measured for this checkpoint? All answers in seconds

1 answer:

kicyunya [14]2 years ago

8 0

Answer:

25

Explanation:

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1 year ago

How many sodium atoms are in 0.1310 g of sodium

Lana71 [14]

To convert grams to atoms, we first need to find the moles and then multiply by Avogadro's constant.

0.1310 g * (1 mol/22.99 g) * (6.022*10^23 atom/1 mol) = 3.431 *10^21 atoms.

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6.74 g of the monoprotic acid KHP (MW = 204.2 g/mol) is dissolved into water. The sample is titrated with a 0.703 M solution of

Dennis_Churaev [7]

Answer:

Volume of the calcium hydroxide solution used is 0.0235 mL.

Explanation:

$2KHP+Ca(OH)_2\rightarrow 2H_2O+Ca(KP)_2$

Moles of KHP = $\frac{6.74 g}{204.2 g/mol}=0.0330 mol$

According to reaction, 2 moles of KHP with 1 mole of calcium hydroxide , then 0.0330 moles of KHP will recat with ;

$\frac{1}{2}\times 0.0330 mol=0.01650 mol$ of calcium hydroxide

Molarity of the calcium hydroxide solution = 0.703 M

Volume of calcium hydroxide solution = V

$Molarity=\frac{Moles}{Volume(L)}$

$0.703 M=\frac{0.01650 M}{V}$

$V=\frac{0.01650 M}{0.703 M}=0.0235 mL$

Volume of the calcium hydroxide solution used is 0.0235 mL.

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2 years ago

What is the mass (in grams) of 8.45 x 1023 molecules of dextrose: C6H12O6 (Mw. 180.16 g/mol)?

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1 year ago

Plseas help Calculate the amount of moles in 57.6 Liters of Carbon Dioxide.

slavikrds [6]

Convert 57.6 L to dm3 and divide it by 24

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1 year ago