1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yaroslaw [1]
3 years ago
12

PLEASE HELP!! DIMENSIONAL ANALYSIS AND MOLE CONVERSIONS CHEMISTRY!!

Chemistry
1 answer:
Slav-nsk [51]3 years ago
7 0

Answer:

Moles of helium gas = 120

Explanation:

Given:

Volume of He = 30 L = 30,000 ml

Density of He = 0.016 g/ml

Find:

Moles of helium gas

Computation:

Mass = Volume of He x Density of He

Mass = 30,000 x 0.016

Mass = 480 gram

Moles of helium gas = 480 / 4

Moles of helium gas = 120

You might be interested in
Collected data consists of:
san4es73 [151]

The number of moles of the magnesium (mg) is 0.00067 mol.

The number of moles of hydrogen gas is 0.0008 mol.

The volume of 1 more hydrogen gas (mL) at STP is 22.4 L.

<h3>Number of moles of the magnesium (mg)</h3>

The number of moles of the magnesium (mg) is calculated as follows;

number of moles = reacting mass / molar mass

molar mass of magnesium (mg) = 24 g/mol

number of moles = 0.016 g / 24 g/mol = 0.00067 mol.

<h3>Number of moles of hydrogen gas</h3>

PV = nRT

n = PV/RT

Apply Boyle's law to determine the change in volume.

P1V1 = P2V2

V2 = (P1V1)/P2

V2 = (101.39 x 146)/(116.54)

V2 = 127.02 mL

Now determine the number of moles using the following value of ideal constant.

R = 8.314 LkPa/mol.K

n = (15.15 kPa x 0.127 L)/(8.314 x 290.95)

n = 0.0008

<h3>Volume of 1 mole of hydrogen gas at STP</h3>

V = nRT/P

V = (1 x 8.314 x 273) / (101.325)

V = 22.4 L

Learn more about number of moles here: brainly.com/question/13314627

#SPJ1

7 0
1 year ago
Explain why saltwater is considered a mixture
lutik1710 [3]
Because it is a mix of H2O (water) and NaCl (salt)
3 0
3 years ago
Read 2 more answers
How do I calculate the sum of 6.078 g and 0.3329 g ?
Vesnalui [34]
The answer is 6.4109 grams
8 0
3 years ago
How do protons in the nucleus behave?
IRISSAK [1]

Answer:

Protons and neutrons are made up of smaller subatomic particles. When protons or neutrons get close enough to each other, they exchange particles (mesons), binding them together. Once they are bound, it takes considerable energy to break them apart.

7 0
3 years ago
What is the specific heat of mercury if it requires 167 J to change the temperature
enot [183]

Answer:

1. 39 J/g°C

Explanation:

4 0
3 years ago
Other questions:
  • Which body of water is to the east of Central America? Atlantic Ocean Pacific Ocean Caribbean Sea Arctic Ocean
    15·2 answers
  • What are some ways you can divide these dogs into groups?
    15·2 answers
  • A gas at 300 k and 4.0 atm is moved to a new loacation with a temperature of 250 k. The volume changes from 5.5 L to 2.0 L. What
    8·1 answer
  • Draw the major byproduct of the reaction (not the minor species discussed in q2b). At which stage did you remove it from your sa
    10·1 answer
  • If y &gt; z, which of the following equations must be true?
    14·1 answer
  • A chemist determines by measurements that moles of nitrogen gas participate in a chemical reaction. Calculate the mass of nitrog
    12·1 answer
  • Which of the following genotypes would result in a red phenotype?
    7·1 answer
  • Which two elements are combined in sodium chloride
    9·2 answers
  • A quantity of 1.922 g of methanol (CH3OH) was burned in a constant-volume bomb calorimeter. Consequently, the temperature of the
    15·1 answer
  • Use the chart below to answer the question.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!