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
gavmur [86]
3 years ago
13

Help me with assigment please

Chemistry
1 answer:
vesna_86 [32]3 years ago
8 0

Answer: I belive the answer is A

Explanation:

You might be interested in
The recommended daily allowance (rda of calcium is 1.2 g. calcium carbonate contains 12.0% calcium by mass. how many grams of ca
defon
1) Calcium carbonate contains 40.0% calcium by weight.
M(CaCO₃)=100.1 g/mol
M(Ca)=40.1 g/mol
w(Ca)=40.1/100.1=0.400 (40.0%)!

2) Mass fraction of this is excessive data.

3) The solution is:

m(Ca)=1.2 g

m(CaCO₃)=M(CaCO₃)*m(Ca)/M(Ca)

m(CaCO₃)=100.1g/mol*1.2g/40.1g/mol=3.0 g
4 0
3 years ago
Read 2 more answers
What is the main reason scientists perform experiments
Anuta_ua [19.1K]
B, they then interpret that data to find their answers
3 0
3 years ago
Read 2 more answers
Question is in the image
zloy xaker [14]

Answer:(3)

Explanation: 2Al+3H2SO4----->Al(2SO4)3+3H2

6 0
3 years ago
Read 2 more answers
Well................................
Law Incorporation [45]

Answer:

w t f

w t f

confused to the max

8 0
3 years ago
Read 2 more answers
If you have ever peeled the label off a glass jar, you may have noticed that the glue does not easily wash off with water. Howev
shepuryov [24]

Answer:

It can be removed by acidic chemicals

Explanation:

8 0
3 years ago
Other questions:
  • Which statement describes a cycle of Earth's surface?
    9·2 answers
  • Which would be expected to have the higher boiling point, t-butyl alcohol (2-methyl-2-propanol) or n-butyl alcohol (1-butanol)?
    11·1 answer
  • Write the balanced equation for the reaction of aqueous sodium carbonate and aqueous calcium chloride dihydrate to form solid ca
    13·2 answers
  • Help me please I need to write the number of atoms
    6·1 answer
  • Elements and molecules will always reemit the exact radiation that they
    7·1 answer
  • I NEED HELP FAST, BRAINLIEST! :)<br><br> Why is water a good choice of fluid in a heat exchanger?
    15·2 answers
  • PLEASE HELP ME!
    6·1 answer
  • A gas has a volume of 20.0 L at a pressure of 950 mmHg with a temperature of 125.0 o If the conditions are changed to STP, what
    11·1 answer
  • When a rock is wrapped in aluminum foil, the radiation detected from the 29
    9·1 answer
  • 3. A magnet attracts a piece of metal. How is this event like a chemical bond?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!