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
attashe74 [19]
3 years ago
5

Which mass of urea, CO(NH2)2, contains the same mass of nitrogen as 101.1g of potassium nitrate?

Chemistry
1 answer:
Effectus [21]3 years ago
4 0
In order to calculate the mass of nitrogen, we must first calculate the mass percentage of nitrogen in potassium nitrate. This is:
% nitrogen = mass of nitrogen / mass of potassium nitrate
% nitrogen = 14 / 101.1 x 100

The mass of nitrogen = % nitrogen x sample mass
= (14 / 101.1) x 101.1
= 14 grams

The molar weight of nitrogen is 14. Each mole of urea contains two moles of nitrogen. Therefore, for there to be 14 grams of nitrogen, there must be 0.5 moles of urea.
Mass of urea = moles urea x molecular weight urea
Mass of urea = 0.5 x 66.06
Mass of urea = 33.03 grams
You might be interested in
The measurement 0.0002833g has how many significant figures?
kherson [118]

Answer:

There are seven significant figures

Explanation:

There are seven different digits within the number. Three 0s, one 2, one 8, and two 3s, adding up to seven different numbers. You exclude the first 0 when the number is a decimal, leaving seven significant figures. Hope this makes sense! :)

6 0
2 years ago
What occurs when a solid substance dissolves into a liquid? 1 It stays solid and sinks to the bottom of the liquid substance. 2
katrin [286]

Explanation:

When a solid substance is dissolved in a liquid such as water, the intermolecular forces of attraction between the molecules in the solid substance are overcome and they exist as ions in the solution. Hence the answer is 2.

6 0
3 years ago
How many total atoms are in one molecule of maltose?
barxatty [35]

Answer:

The total number of atoms is 12 + 22 + 11 = 45, so carbon atoms are 12/45 of the total.

Explanation:

6 0
3 years ago
Is corrosion of aluminum metal a chemical or physical process
nadya68 [22]
Corrosion of aluminium metal is a chemical process. Corrosion happens when a certain chemical reaction takes place.
8 0
3 years ago
Pls help will give brainliest
vlada-n [284]

The mass of a present which has a density of 2.15 kg/L and volume of 3650 mL is 7.74 kg.

<h3>How do we calculate mass?</h3>

Mass of any substance will be calculate by using the density and volume by using the below equation as:

Density = Mass / Volume

Given that,

Density of Christmas present = 2.15 kg/L

Volume of present = 3,650 mL = 3.6L

On putting values, we get

Mass = (2.15)(3.6) = 7.74

Hence required mass of Christmas present is 7.74 kg.

To know more about density, visit the below link:
brainly.com/question/10441359

#SPJ1

4 0
2 years ago
Other questions:
  • The half-life of C-14 is 5470 years. If a particular archaeological sample has one-quarter of its original radioactivity remaini
    15·2 answers
  • Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO_3)
    7·2 answers
  • What is the difference between a gas and a solid
    5·2 answers
  • There state of matter that keeps its shape and volume when it is placed in a container
    13·1 answer
  • Two pieces of iron with the different masses - 500 g and 1000 g - both have 4.5 kJ of energy added to them.
    5·1 answer
  • What is the ph of an aqueous solution with the hydronium ion concentration?
    14·1 answer
  • HELP!!! Question 10.
    7·2 answers
  • What happens when a current is applied to two electrodes immersed in pure water?
    7·2 answers
  • The blank
    8·1 answer
  • ________ is the force that keeps planets in orbit around the sun
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!