4 years ago

The value 0.01 gram is equivalent to 1 hectogram. a. True b. False

Chemistry

1 answer:

raketka [301]4 years ago

5 0

b. false

0.01 gram is equivalent to 0.0001 hectogram.

hope this helps!.

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At what temperature (in °C) would one liter of phosphine gas, PH3, have a mass of 1.725 g, if the gas pressure is 0.9910 atm? As

Nutka1998 [239]

Answer: Temperature of one liter of phosphine gas with a mass of 1.725 g and gas pressure of 0.9910 atm is $-36^0C$

Explanation:

According to the ideal gas equation:

PV=nRT

P = Pressure of the gas = 0.9910 atm

V= Volume of the gas= 1.0 L

T= Temperature of the gas in kelvin = ?

R= Gas constant = $0.0821Latm/Kmol$

n= moles of gas= $\frac{\text {given mass}}{\text {molar mass}}=\frac{1.725g}{34g/mol}=0.051ol$

$0.9910atm\times 1.0=0.051\times 0.0821\times T$

$T=236.7K=(236.7-273)^0C=-36.3^0C$

Thus the temperature (in °C) of one liter of phosphine gas with a mass of 1.725 g and gas pressure of 0.9910 atm is $-36.3^0C$

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4 years ago

6. Using the rules of significant figures, calculate the following:

Burka [1]

Answer:

A. 3

B . 2

C. 2

D. 2

E. 4 significant figures

3 0

3 years ago

93.2 mL of a 2.03 M potassium fluoride (KF) solution is diluted with 3.92 L of water.

pishuonlain [190]

Answer:

0.047 M

Explanation:

Given data:

Volume of KF = 93.2 mL

Molarity of KF = 2.03 M

volume of water added= 3.92 L

Solution:

First of all we will calculate the number of moles of KF.

number of moles = Molarity × volume in litter

number of moles = 2.03 mol/L × 0.0932 L

number of moles = 0.189 mol

Molarity of solution:

Total volume = 3.92 L + 0.0932 L = 4.0132 L

Molarity = number of moles / volume in litter

Molarity = 0.189 mol/ 4.0132 L

Molarity = 0.047 M

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4 years ago

Which of the following represents the correct temperature and pressure at STP?

melamori03 [73]

B is the correct answer if I remember

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Explanation:

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3 years ago