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
Genrish500 [490]
3 years ago
10

How many moles are present in a 120.0g sample of calcium

Chemistry
2 answers:
MArishka [77]3 years ago
4 0
I THINK this is the answer: 4809.35999999786. (found it on a website)

Bad White [126]3 years ago
4 0
You have 120 grams and in one mol of Ca is 40.08 g of Ca (the mass of Calcium) so you divide 120/40.08 to get 2.991 moles of Ca

You might be interested in
38) Which of the following is not a reaction of alcohol
mylen [45]
<h2>I guess...</h2>

<h3>Dehydration </h3>
8 0
3 years ago
Which statement is true?
Amiraneli [1.4K]

Answer: c. Matter and energy are conserved in chemical reactions.

Explanation:

According to the law of conservation of matter, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

For every chemical reaction, the law of conservation of energy is applicable which states that the energy of the system remains conserved. Energy can neither be created nor destroyed.  It can be transformed from one form to another.

8 0
3 years ago
Use the activity series below to predict whether the following reactions will take place.
andrey2020 [161]
First one is yes second one is no :)
5 0
3 years ago
What is the volume of 0.5 moles of a gas at 2 atmospheres of pressure and 15°c​
liq [111]

Answer:

6l

Explanation: convert temperature to kelvin by adding 273 and then input the values into the formula with the given constant

2*v=0.5*0.8206*288 then divide both sides by 2 and get the amount in litres which is 6

4 0
3 years ago
A compound contains 64 g of o and 8 g of h. what is the empirical formula for this compound?
kaheart [24]
The empirical formula is obtained by calculating the mole ratios of the atoms in the elements.
The number of moles =mass/ R.A.M
For hydrogen, no. of moles=8/1=8
For oxygen, no. Of moles=64/16=4
The tabular solution is attached.

6 0
3 years ago
Read 2 more answers
Other questions:
  • What are some chemical formulas for compounds?
    14·1 answer
  • What is the balanced ionic equation for the reaction HCHO2 (aq) + KOH (aq)
    14·1 answer
  • In Balancing Equations, why do I put a 3 before reactant H?
    5·1 answer
  • Determine which physical conditions are necessary to support nuclear fusion and formation of stars.
    8·1 answer
  • I NEED HELP PLEASE! THIS IS HARD FOR ME!!
    9·1 answer
  • I just need to know which ones are insulators and the others conductors
    6·1 answer
  • What season starts in the northern hemisphere as the suns direct rays strike the equator moving from the southern hemisphere to
    7·1 answer
  • (Someone please help!)
    11·2 answers
  • If an element has two or more atoms with the same number of protons but different number of neutrons it is called what
    12·1 answer
  • How many GRAMS are in 3.78 mol of NaOH?<br><br> A. 150 g/mol<br> B. 151.12 g/mol<br> C. 151.1 g/mol
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!