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
ollegr [7]
2 years ago
14

What is the percent composition of nitrogen in a 2.57 g sample of Al(NO3)3?

Chemistry
1 answer:
Lisa [10]2 years ago
6 0

Answer:

19.8% of Nitrogen

Explanation:

In the Al(NO₃)₃ there are:

1 atom of Al

3 atoms of N

And 9 atoms of O

The molar mass of Al(NO₃)₃ is:

1 Al * (26.98g/mol) = 26.98g/mol

3 N * (14g/mol) = 42g/mol

9 O * (16g/mol) = 144g/mol

26.98 + 42 + 144 = 212.98g/mol

We can do a conversion using these molar masses to find the mass of nitrogen is the sample, that is:

2.57g * (42g/mol / 212.98g/mol) =

0.51g N

Percent composition of nitrogen is:

0.51g N / 2.57g * 100

= 19.8% of Nitrogen

You might be interested in
How many atoms of each element are present in the nucleotide adenine:C9H14N3O8P
alisha [4.7K]

Answer:

not sure but i think that there are 35 atoms.

Have a great day!

5 0
3 years ago
Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol. IE1, 1314 IE2, 3389 IE3, 529
Elan Coil [88]
It’s fluorine it has a big jump from the 6th to 7th ionisation energy.

It’s electronic configuration is 1s2 2s2 2p5 as it has 9 electrons and 7 electrons in outermost shell.

Therefore it’s in group 7, as after the 7 electrons are removed, the 8th electron is removed from a quantum shell closer to the nucleus.

This results in greater ionisation energy due to stronger electrostatic forces of attraction between positively charge nuclei and electrons ( + shorter distance)
6 0
3 years ago
You must make an aqueous solution that will be a good conductor of electricity. You can pick two substances to add to the water.
Arte-miy333 [17]
The acid and the salt are the answers
6 0
3 years ago
Read 2 more answers
The titration of a 20.0-mLmL sample of an H2SO4H2SO4 solution of unknown concentration requires 22.87 mLmL of a 0.158 M KOHM KOH
kkurt [141]

Answer:

0.0905 M

Explanation:

Let's consider the neutralization reaction between H2SO4 and KOH.

H₂SO₄ + 2 KOH → K₂SO₄ + 2 H₂O

22.87 mL of 0.158 M KOH react. The reacting moles of KOH are:

0.02287 L × 0.158 mol/L = 3.61 × 10⁻³ mol

The molar ratio of H₂SO₄ to KOH is 1:2. The reacting moles of H₂SO₄ are 1/2 × 3.61 × 10⁻³ mol = 1.81 × 10⁻³ mol

1.81 × 10⁻³ moles of H₂SO₄ are in 20.0 mL. The molarity of H₂SO₄ is:

M = 1.81 × 10⁻³ mol / 0.0200 L = 0.0905 M

3 0
3 years ago
Jose and Sarah are running in the cross country meet. Their skeletal and muscular systems work to move them through the course.
Inessa [10]

Answer: Jose and Sarah are running in the cross country meet. Their skeletal and muscular systems work to move them through the course. As they run, they breathe faster and harder and their heart rate increases.

A.work together

Explanation:This should help:)

5 0
3 years ago
Other questions:
  • 42.5 grams of an unknown substance is heated to 105.0 degrees Celsius and then placed into a calorimeter containing 110.0 grams
    9·1 answer
  • 24. Write the formula for the compound barium oxide.
    10·2 answers
  • At a certain temperature, iron (II) oxide, FeO, can react with carbon monoxide, CO, to form elemental iron, Fe, and carbon dioxi
    7·1 answer
  • 50cm3 of a mixture of methane and hydrogen were mixed with excess oxygen and exploded, the product after cooling to the original
    9·1 answer
  • Will Upvote!!!<br> Determine the correct IUPAC name for this branched chain hydrocarbon.
    11·1 answer
  • How many grams are in a teragram?<br> 102<br> 10°<br> 10%<br> 10<br> o<br> 10<br> -9<br> 10-12<br> o
    13·1 answer
  • Help please it’s due soon just calculate the atomic mass of lithium that’s all i need
    12·1 answer
  • Xavier boiled 19 grams of water. If all of the water changed into a gas, what would be the mass of the steam?
    13·1 answer
  • 3c reaction time =138.5 sec reation rate=
    5·1 answer
  • Why does radiation decrease over time?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!