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
If you can help me answer any of these I’d appreciate it so much!
Shkiper50 [21]

Answer:

I  can answer some of these.

Explanation:

Q 36.  B. Is false.

Q. 37  C. is false.

Q. 28.

All the  numbers are 1.

5 0
3 years ago
PLS HELP ME, use the periodic table to write the electron configuration of selenium
EastWind [94]

Answer:

[Ar] 3d10 4s2 4p4

Explanation:

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4

6 0
2 years ago
What is the oxidation number of Fe in [Fe (CN)4]2-​
wlad13 [49]

Answer:

numero de oxidacion: 3+2+2-3      

Explanation:

3 0
3 years ago
I’ll mark brainliest please
DaniilM [7]
I’m assuming your just writing the formula? If so
Potassium chloride: KCL
Potassium nitride: KNO2
Potassium sulfide: K2S
calcium chloride: CaCl2
Calcium nitride: Ca3N2
Calcium sulfide: CaS
Silver chloride: AgCl
Silver nitride: Ag3N
Silver sulfide: Ag2S
Manganese (||) chloride: MnCl2
Manganese (||) nitride: Mn3N2
Manganese (||) sulfide: MnS
5 0
2 years ago
Sunlight is composed of energy that is visible to humans and energy that is not visible to humans. Which statement describes how
Vilka [71]

Answer:

A

both forms of energy referred to in the question is light and heat energy

light energy is the visible energy that travels at a known constant speed of 3.0×10^9m/s

while heat energy is the invisible energy that travels in form of radiation at variable speeds

4 0
2 years ago
Other questions:
  • HELP!!! The reversible reaction for the pH indicator bromophenol blue is (C19H8Br4O5S)H– ↔ (C19H8Br4O5S)2– + H+. Write the equil
    5·1 answer
  • How much heat, in kJ, is required to melt 54.0 g of ice at 0°C into water at 0°C if Hfus for water = 6.01?
    5·2 answers
  • Sodium tripolyphosphate is used in detergents to make them effective in hard water. calculate the oxidation number of phosphorus
    14·1 answer
  • What must happen to uranium before it can be used as a fuel source?
    5·1 answer
  • How do I calculate the molecular and molar masses of compounds​
    9·2 answers
  • Many scientists, including Joseph Priestly, hypothesized that fuels lost mass as they burned due to the loss of a substance call
    15·1 answer
  • Why do we need to do all our comparisons at the same temperature and pressure?
    6·1 answer
  • 7. Sinif caliskan yayinlar cevapları ​
    10·1 answer
  • A Write a set of four quantum numbers possible for the circled electron in arsenic (As). (There could be more
    6·1 answer
  • Can someone help me find the total of the calories and grams?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!