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
Gwar [14]
3 years ago
8

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 40.0 g of c

alcium fluoride?
Chemistry
1 answer:
Temka [501]3 years ago
6 0

Answer:

20.53 g.

Explanation:

  • Knowing that every 15.0 g of pure calcium fluoride contains 7.70 g of calcium.

<u>Using cross multiplication:</u>

15.0 g of pure calcium fluoride contains → 7.70 g of calcium.

40.0 g of pure calcium fluoride contains → ??? g of calcium.

<em>∴ The mass of Ca in 40.0 g of calcium fluoride</em> = (7.70 g)(40.0 g)/(15.0 g) = <em>20.53 g.</em>

You might be interested in
Which of the following is the best name for SO3
Xelga [282]
Sulfur trioxide. hope this helps
6 0
3 years ago
Read 2 more answers
Define Kelvin's Temperature. ​
sattari [20]

Answer:

Is an absolute temperature scale with zero at absolute zero

6 0
3 years ago
Kevin activates an instant hot pack to put in each glove while he trains for the Iditarod dog sled race in Alaska. When the hot
Usimov [2.4K]

Answer:

I think it's D

Explanation:

because it says when ever air hits the iron it reacts so if we make a slower release then it will take less time to get cold !

6 0
3 years ago
When studying atoms, scientists can ignore the
vekshin1

When studying atoms, scientists can ignore <u>the Gravitational</u> force between charged particles that make up  the atoms because it is many millions of times smaller than other forces in the atom.

Explanation:

Scientists can ignore the gravitational force because the gravitational force is considered to be negligible as compared to the other forces due to its smaller value.We all know that the gravitational force is directly proportional to the mass of an object which  result in  a small force value.When the value of this small force is compared to the value of the electrical force between protons and electrons in atoms the we can say that the electrical force is million times stronger than the gravitational force

Thus we can say that scientists can ignore <u>the Gravitational</u> force between charged particles that make up  the atoms because it is many millions of times smaller than other forces in the atom.

3 0
3 years ago
How many grams of Rb2O is produced from decomposing 24 moles of RbOH ?
solong [7]

Answer:

4486

Explanation:

3 0
3 years ago
Other questions:
  • What mass in grams of AgCl is produced
    7·2 answers
  • Which substance is the oxidizing agent in this reaction? feo+co→fe+co2 express your answer as a chemical formula?
    10·2 answers
  • How many molecules are in 3.40 mol He?
    6·1 answer
  • The production of NOx gases is an unwanted side reaction of the main engine combustion process that turns octane, C8H18, into CO
    11·2 answers
  • A pure substance that cannot be broken down into any other substance by a physical or chemical means is a (n) ______
    13·2 answers
  • How many grams of NaOH are needed to prepare 100.ml of a 0.20 M NaOH solution
    14·1 answer
  • C. rubidium sulfate
    8·1 answer
  • With over 6 billion people living on Earth, it is common for two people to have the same DNA.
    13·1 answer
  • What is the number of Co2 in a 220 gram
    10·1 answer
  • Describe the shape of the graph during the period when water is freezing. Why the graph is shaped this way?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!