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
NARA [144]
3 years ago
11

The rotational period of the moon is_____

Chemistry
1 answer:
Ivahew [28]3 years ago
6 0

Answer:

Hi, I think the D since the moon rotates about once a month and these months have different amounts of days. an example would be February that can have like 28 or 29 in leap year

Explanation:

You might be interested in
A 5.325g sample of methyl benzoate, a compound in perfumes , was found to contain 3.758 g of carbon, 0.316 g of hydrogen, and 1.
Alexxandr [17]

<u>Answer:</u> The empirical and molecular formula of the compound is C_4H_4O and C_8H_8O_2 respectively

<u>Explanation:</u>

We are given:

Mass of C = 3.758 g

Mass of H = 0.316 g

Mass of O = 1.251 g

To formulate the empirical formula, we need to follow some steps:

  • <u>Step 1:</u> Converting the given masses into moles.

Moles of Carbon =\frac{\text{Given mass of Carbon}}{\text{Molar mass of Carbon}}=\frac{3.758g}{12g/mole}=0.313moles

Moles of Hydrogen = \frac{\text{Given mass of Hydrogen}}{\text{Molar mass of Hydrogen}}=\frac{0.316g}{1g/mole}=0.316moles

Moles of Oxygen = \frac{\text{Given mass of oxygen}}{\text{Molar mass of oxygen}}=\frac{1.251g}{16g/mole}=0.078moles

  • <u>Step 2:</u> Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.078 moles.

For Carbon = \frac{0.313}{0.078}=4.01\approx 4

For Hydrogen  = \frac{0.316}{0.078}=4.05\approx 4

For Oxygen  = \frac{0.078}{0.078}=1

  • <u>Step 3:</u> Taking the mole ratio as their subscripts.

The ratio of C : H : O = 4 : 4 : 1

The empirical formula for the given compound is C_4H_4O

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is:

n=\frac{\text{Molecular mass}}{\text{Empirical mass}}

We are given:

Mass of molecular formula = 130 g/mol

Mass of empirical formula = 68 g/mol

Putting values in above equation, we get:

n=\frac{130g/mol}{68g/mol}=1.9\approx 2

Multiplying this valency by the subscript of every element of empirical formula, we get:

C_{(2\times 4)}H_{(2\times 4)}O_{(2\times 2)}=C_8H_8O_2

Hence, the empirical and molecular formula of the compound is C_4H_4O and C_8H_8O_2 respectively

4 0
3 years ago
Chem homework, help?
IrinaVladis [17]
I'm not writing random things to reach the 20 character requirement so I can tell you that Magnesium has the least amount of atoms.
4 0
3 years ago
How many moles of carbon dioxide can be formed by the decomposition of 5.0 moles of aluminium carbonate
Ksenya-84 [330]

Answer:

30 moles of CO₂

Explanation:

3 0
2 years ago
Which chemical equation correctly represents the reaction that takes place when nitrogen gas and hydrogen gas are formed as ammo
Leviafan [203]

Answer:

  • d. 2NH3(g)-N2(g)+3H2(g)
4 0
2 years ago
If a cross-country runner covers a distance of 347 meters in 134 seconds what is her speed?
Vlad1618 [11]
Distance s=347 meters
time t=134 sec.
speed =s/t=347/134=2.5896 m/s nearly
5 0
3 years ago
Other questions:
  • Explain two advantages and disadvantages of using energy created by nuclear fission and nuclear fusion.
    13·1 answer
  • Which word refers to the smallest functional unit of living thing
    7·1 answer
  • Rank the following groups in order of decreasing priority: A. bondCtbondCH B. bondCH(CH3)2 C. bondCH2CH3 D. bondCHdbondCH2
    13·1 answer
  • Calculate the pH of a solution that contains 2.7 M HF and 2.7 M HOC6H5. Also, calculate the concentration of OC6H5- in this solu
    14·1 answer
  • Molar mass of KAl(SO4)^2·12H2O
    7·2 answers
  • What are the similarities and differences between unicellular and multicellular organisms?
    13·1 answer
  • A chemical formula (such as H20) can be considered a type of model.<br> O True<br> O False
    9·2 answers
  • Are electrons exchanged between ionic or covalent bonds
    13·2 answers
  • Calculate the mass of water produced when 9.57 g of butane reacts with excess oxygen.
    6·1 answer
  • What lab equipment do you use to measure the density of gold and how to use it​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!