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
irga5000 [103]
3 years ago
13

Calculate the number of moles 41.0 g of Ca(NO3)2  1.48 g of Ca(OH)2  3.40 g of CaSO4

Chemistry
1 answer:
Lemur [1.5K]3 years ago
8 0
First. moles is just a label for a number of things. just like a dozen = 12, a gross = 144, a mole = 6022 with another 20 zeros after the 2

next

moles = mass / molecular weight.

molecular weight = sum of atomic mass from the periodic table

atomic mass MnO2 = atomic mass Mn + 2 x atomic mass O
= 54.94 + 2 x 16 = 86.94 g/mole

so moles MnO2 = 98.0 grams / (86.94 g/mole) = 1.13 moles

notice that I only gave 3 digits? that because of sig figs read the link below if you don't understand....

mw C5H12 = 5 x 12 + 12 x 1 = 72 g/mole

so moles C5H12 = 12.0 g / 72.0 g/mole = 0.167 moles

mw XeF6 = 131.3+ 6 x 19.00 = 245.3

so moles XeF6 = 100 g / 245.3 g/mole = 0.4077 moles

I've also provided a link to a periodic table. if you need atomic weights click on any element and it will give you the
details.
You might be interested in
Whitch is a type of mining where steam beds are minded
Varvara68 [4.7K]

Answer: placer mining

3 0
3 years ago
43) In a hydrogen bond between a water molecule and another biomolecule: A). a hydrogen ion on the water molecule forms an ionic
Tpy6a [65]

Answer: The hydrogen bond will typically form between a hydrogen atom and either a nitrogen, sulfur, or  oxygen atom.

I hope that this helps you !

5 0
3 years ago
Which statement best describes what makes a base weak? A base is weak when it forms few ions in water. A base is weak when only
mina [271]

Answer:

A base is weak when only a little of it is dissolved in water

Explanation:

3 0
3 years ago
What is the <br>structure and symmetry operation of naphthalene​
d1i1m1o1n [39]

Answer:

Naphthalene has C2-rotational axis passing through the C9-C10 bond. It has two C2-axes perpendicular to the principal C2-rotational axis (one is passing through the mid-point of the C9-C10 bond another passing through the midpoints of C2-C3, C9-C10, C6-C7 bonds).

Explanation:

3 0
3 years ago
hii thank you for helping me for that question please give me now this question define the air polution​
ahrayia [7]

Answer:

A mixture of solid particles and gases in the air.

Explanation:

Air pollution is a mixture of solid particles and gases in the air. car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.

5 0
2 years ago
Read 2 more answers
Other questions:
  • Sarah needs to replace part of the metal railing on her deck and wants the new railing to match the existing railing. However, s
    10·1 answer
  • Which two atoms could be the "before'' and ''after'' of an alpha ejection
    9·1 answer
  • Consider the following reaction at a high temperature. Br2(g) ⇆ 2Br(g) When 1.35 moles of Br2 are put in a 0.780−L flask, 3.60 p
    9·1 answer
  • what is the molecular formula of a compound with an empiricla formula of ch and a molecular mass of 78
    9·1 answer
  • Briefly describe the movement of water through the water cycle
    9·2 answers
  • A ball was massed in a dish. The total mass was 15.6 grams. Treball was placed in a
    6·1 answer
  • Curium – 245 is an alpha emitter. Write the equation for the nuclear reaction and identify the product nucleus.
    15·1 answer
  • What is the specific heat of copper when heated to 221.32
    9·1 answer
  • An exothermic reaction
    13·1 answer
  • Which of the following is not correct Stated? '
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!