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
solmaris [256]
3 years ago
9

How many atoms are 0.750 moles of zinc?

Chemistry
1 answer:
Darya [45]3 years ago
7 0
<span>.750 moles X (6.02 x10^23 atoms/1 mol)= 4.52 X 10^23 atoms is the answer </span>
You might be interested in
Dose All plants have a vascular system of pipes that transport fluids]
USPshnik [31]

Answer:

certain types of plants (vascular plants) have a system for transporting water, minerals

4 0
3 years ago
A compound with a molar mass of 60g/mol is 40.4% carbon, 6.7% hydrogen and 53.3% oxygen (by mass). determine the emperical and m
Fittoniya [83]

<span>A compound is found to be 40.0% carbon, 6.7% hydrogen and 53.5% oxygen. Its molecular mass is 60. g/mol. 
</span>Q1)
Empirical formula is the simplest ratio of whole numbers of components making up a compound.
the percentages have been given, therefore we can calculate for 100 g of the compound.

                                C                            H                        O
Mass in 100 g      40.0 g                       6.7 g                   53.5 g
Molar mass            12 g/mol                1 g/mol                 16 g/mol
Number of moles   40.0/12= 3.33         6.7/1 = 6.7          53.5/16 = 3.34
Divide by the least number of moles  
                             3.33/3.33 = 1           6.7/3.33 = 2.01   3.34/3.33 = 1.00
after rounding off
C - 1 
H - 2
O - 1

Empirical formula - CH₂O

Q2)
Molecular formula is the actual number of components making up the compound.
To find the number of empirical units we have to find the mass of one empirical unit.
Mass of one empirical unit = CH₂O - 12 + (1x2) + 16 = 30 g
Mass of one mole of compound = 60 g
Number of empirical units = 60 g / 30 g = 2
Therefore molecular formula - 2(CH₂O) 
 Molecular formula - C₂H₄O₂
4 0
3 years ago
What is the molecular formula of chalk ?
NemiM [27]

Explanation:

Calcium carbonate (Chalk) is a chemical compound, with the chemical formula CaCO3. Calcium carbonate (Chalk) is a chemical compound, with the chemical formula CaCO3.

4 0
2 years ago
Read 2 more answers
A solution has a pH of 12. This solution is:
kolezko [41]

Answer:

basic

Explanation:

pH 7: neutral

12>7

so it is basic

(if <7 than acidic)

3 0
3 years ago
4 Compared to the energy and charge of the electrons in the first shell of a Be atom, the electrons in the second shell of this
Korvikt [17]
Moving the electron away from the nucleus requires energy, so the electrons in the outer shell will have more energy than ones in the inner shell. Electrons always have a charge of -1, so the charge in the inner and outer shell will be the same. Therefore the answer is 3
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which determines the state of matter for any material?
    7·1 answer
  • What is not a chemical property of an apple?
    10·2 answers
  • Which of these is a problem with using nuclear energy?
    6·2 answers
  • Which statement is true of a catalyst?
    12·1 answer
  • A sample of nitrogen gas had a volume of 500. ml, a pressure in its closed container of 740 torr, and a temperature of 25 °c. wh
    9·1 answer
  • HELP PLEASEEE !!! ILL MARK YOU BRAINLIEST + 15 POINTS
    9·2 answers
  • Why are city streets so vital to the functioning of a city, as well as the people living within it?
    10·1 answer
  • Can the element calcium be found in more than one state of matter?
    14·1 answer
  • why do you think that sodium chloride has to be heated to 800c before melting, but candle wax will start to melt at 50c?
    6·1 answer
  • Pleeeeasee someone who’s good at chemistry?! 10 grade
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!