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
Of the following equilibria, only ________ will shift to the right in response to a decrease in volume. N2 (g) + 3H2 (g) 2NH3 (g
igomit [66]

Answer:

Of the following equilibria, only one will shift to the right in response to a decrease in volume.

N_2 (g) + 3H_2 (g)\rightleftharpoons 2NH_3 (g)

On decreasing the volume the equilibrium will shift in right direction due to less number of gaseous moles on product side.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

Decrease the volume

If the volume of the container is decreased , the pressure will increase according to Boyle's Law. Now, according to the Le-Chatlier's principle, the equilibrium will shift in the direction where decrease in pressure is taking place. So, the equilibrium will shift in the direction number of gaseous moles are less.

N_2 (g) + 3H_2 (g)\rightleftharpoons 2NH_3 (g)

On decreasing the volume the equilibrium will shift in right direction due to less number of gaseous moles on product side.

2 Fe_2O_3 (s) \rightleftharpoons 4 Fe (s) + 3O_2 (g)

On decreasing the volume the equilibrium will shift in left direction due to less number of gaseous moles on reactant side.

2 SO_3 (g) \rightleftharpoons 2 SO_2 (g) + O_2 (g)

On decreasing the volume the equilibrium will shift in left direction due to less number of gaseous moles on reactant side.

H_2 (g) + Cl_2 (g) \rightleftharpoons 2 HCl (g)

On decreasing the volume the equilibrium will shift in no direction due to same number of gaseous moles on both sides.

2HI (g) \rightleftharpoons H_2 (g) + I_2 (g)

On decreasing the volume the equilibrium will shift in no direction due to same number of gaseous moles on both sides.

8 0
3 years ago
2. Calculating density of an object with a regular shape
Tatiana [17]

D= 0.10125kg/m^3

EXPLAINATION
Density =mass/volume
D= 226.8/20 x 8 x 14
D=226.8/2240
D= 0.10125kg/m^3
Hope it was helpfull!!
6 0
3 years ago
Luke recorded his results in a table as shown below.
aev [14]
Mnkrnknrkhgnkhthtrfhth

7 0
3 years ago
4 points
musickatia [10]
Divide mass by density to determine volume. 115.384 cm^3 (unsure if you need to round.)
7 0
3 years ago
What is the name of this molecule?
ankoles [38]

Answer: The answer is either A or C. I'm leaning more towards A.

7 0
3 years ago
Read 2 more answers
Other questions:
  • How many hydrogen atoms are in 78.4 grams of hydrochloric acid
    5·2 answers
  • In the periodic table which ones are coloured gases
    10·1 answer
  • When is the potential energy between two atoms at zero?
    14·1 answer
  • Which statement best defines potential enregy?
    12·1 answer
  • Protons are located
    12·1 answer
  • Will mark brainliest!
    10·1 answer
  • What is the mass of solute in 200.0 L of a 1.556-M solution of KBr
    15·1 answer
  • How many grams of H 2 O can be produced with 6.3 moles of O 2 ?
    15·1 answer
  • Solve for Va<br><br>MaVa=MbVb​
    9·1 answer
  • True or false<br> Constructive forces have been wearing away Earths surface for millions of years.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!