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
Georgia [21]
3 years ago
7

How many moles of calcium atoms are in 77.4g of Ca?

Chemistry
1 answer:
lina2011 [118]3 years ago
6 0

Answer:

1.93 mol Ca

Explanation:

Use Calcium's molar mass to convert g of Ca into mol of Ca.

You might be interested in
Convert 4.5 X 1022 molecules of H2O to moles.
noname [10]

Answer:

<h3>The answer is 0.075 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.5 \times  {10}^{22} }{6.02 \times  {10}^{23} }  \\  = 0.074750830...

We have the final answer as

<h3>0.075 moles</h3>

Hope this helps you

3 0
3 years ago
Which of the following is a combustion reaction?
Rina8888 [55]
The answer is b it is a combustion reaction
7 0
4 years ago
FOR 99 POINTS WILL MARK BRAINLIEST If a person has clogged arteries and high blood pressure, his or her doctor might recommend a
Vladimir79 [104]
If the person had clogged arteries and high blood pressure, then went on a healthy diet, the person would start losing weight. They would have a more stable blood pressure (since they are eating healthy foods, with less saturated fat) and the clogged arteries would look significantly better. He/she might lose her/his risk of developing diabetes, heart disease, cancer, etc. Most of her/his health issues would start to balance out if they started eating a diet low in saturated fat.

I hope this helps!
~kaikers
7 0
3 years ago
Challenge question: This question is worth 6 points. As you saw in problem 9 we can have species bound to a central metal ion. T
Llana [10]

Answer:

A

Explanation:

Iron has the ground state electronic configuration [Ar]3d64s2

Fe2+ has the electronic configuration [Ar]3d6.

In an octahedral crystal field, there are two sets of degenerate orbitals; the lower lying three t2g orbitals, and the higher level two degenerate eg orbitals. Strong field ligands cause high octahedral crystal field splitting, there by separating the two sets of degenerate orbitals by a tremendous amount of energy. This energy is much greater than the pairing energy required to pair the six electrons in three degenerate orbitals. Since CN- is a strong field ligand, it leads to pairing of six electrons in three degenerate orbitals

3 0
4 years ago
Why are we not drawing e
alexandr402 [8]
What do you mean by not drawing?
3 0
3 years ago
Other questions:
  • List the electron shell and the number of electrons in each shell
    6·2 answers
  • .
    7·1 answer
  • Propose a reason why very few 2+ ions are formed in a mass spectrometer
    8·1 answer
  • Describe how a mole ratio is correctly expressed when it is used to solve a stoichiometry problem
    7·1 answer
  • Is 4Si2H3 + 11O2=8SiO2+6H2O balanced
    5·1 answer
  • Suppose you fill a glass with ice cubes. When the ice cubes melt, is the glass still full? Explain your answer.
    15·1 answer
  • What s the highest viscosity?
    5·2 answers
  • What is the mass number of silver
    11·2 answers
  • How long is a hard boiled egg good for in the refrigerator?.
    14·1 answer
  • Is fireworks a physical or a chemical change and why??
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!