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
tester [92]
3 years ago
13

How many gram-atoms are in 120-gram sample of calcium metal? How many atoms is this?

Chemistry
1 answer:
Elden [556K]3 years ago
3 0
(sample g/1) X (1 mole/40.078(MW of Ca)) = moles of sample (moles of sample)(6.022 x 10^23( no of atoms)/ 1 mole) = # of atoms in a 120 g sample of calcium Avogadro's number=6.022x 10^23 atoms in 1 mole
You might be interested in
In eukaryotes, the process of cell division is called mitosis true or false quick pls :)
mamaluj [8]
True. Mitosis is a part of the call cycle when replicated chromosomes are separated into new nuclei. It is a for if eukaryotic cell division that produces two daughter cells with the same genetic components as the parent cells.
6 0
3 years ago
Calculate the volume of an object with dimensions measuring: 15cm x 6cm x 10cm
Oksanka [162]

Answer:

15 X 6 X 10 = 900 cm³

Explanation:

4 0
3 years ago
Using the idea that reactions occur as a result of collisions between particles, explain why reaction rates depend on the temper
PIT_PIT [208]

Increasing temperatures in a reaction increases the kinetic energy of the reactant molecules. This causes them to move fast and hence collide with a higher frequency. The higher the rate of collision between the molecules, the faster the reaction.

6 0
3 years ago
What volume of 24% trichloroacetic acid (tca) is needed to prepare eight 3 ounce bottles of 10% tca solution?
Sever21 [200]

Answer:

295.7 mL of 24% trichloroacetic acid (tca) is needed .

Explanation:

Let the volume of 24% trichloroacetic acid solution be x

Volume of required 10% trichloroacetic acid solution =8 bottles of 3 ounces

= 24 ounces = 709.68 mL

(1 ounces =  29.57 mL)

Amount of trichloroacetic acid in 24% solution of x volume of solution will be equal to amount of trichloroacetic acid in 10% solution of volume 709.68 mL.

x\times \frac{24}{100}=709.68 mL\times \frac{10}{100}

x = 295.7 mL

295.7 mL of 24% trichloroacetic acid (tca) is needed .

6 0
3 years ago
The track along which electricity flows is called a:<br><br> fuse<br> circuit<br> switch
Pavel [41]
It is called a circuit.
4 0
2 years ago
Other questions:
  • Why would you not expect to find fossils in metamorphic and igneous rocks?
    5·1 answer
  • In the same condition, what happens to the net force acting on the rope?
    7·1 answer
  • chemist in South America claims to have discovered a new element with an atomic number of 34. An extremely rare element, it was
    12·1 answer
  • What is the physical state of helium at room temperature
    7·1 answer
  • Match the term to the correct definition or example.
    6·1 answer
  • 2. How are membranes classified according to their permeability?
    8·1 answer
  • True are false Selective breeding is a type of genetic engineering.
    6·2 answers
  • Which of the following is an example of a chemical change?
    6·1 answer
  • Why can't we say that acids react with all metals to produce hydrogen ?
    10·2 answers
  • In 1860, Chemists could make which of the following statements about the known chemical elements?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!