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
kakasveta [241]
3 years ago
6

The number of mole of a molecule is defined as its mass per molar mass. Using # mol = n, mass = m and molar mass = M and given t

hat n = M m , rearrange this expression for (a) M = ? (b) m = ? (c) If n = 0.0021 mol and M = 44 g/mol; what is the value of m?
Chemistry
1 answer:
Citrus2011 [14]3 years ago
5 0
Given:
n = 0.0021 mol
M = 44 gram/mol

Required: m or the mass of the molecule

Solution:

M = m/n

Rearranging the expression,

m = M x n
m = 44 g/mol x 0.0021 mol

Evaluating the expression and cancelling units, we obtain,

m = 0.0924 grams

M is the molar mass. This value is very useful in chemistry calculations especially in calculating the amounts of reactants and products for a chemical reaction.
You might be interested in
. Which of the following statements best describes the relationship between elements and compounds?
vampirchik [111]
I think the answer is A
8 0
3 years ago
Food and medical procedures can expose people to radiation. Therefore, the effects of radiation from a nuclear power plant are n
iogann1982 [59]
False, the radiation from food and medical procedures have very little consequences. The radiation from a nuclear power plant can kill people which makes it a very large problem if not contained properly.
<span />
7 0
3 years ago
Read 2 more answers
The diagram illustrates the water cycle.
MissTica

Answer:

Precipitation

Explanation:

In the water cycle, water experiences different phase changes from one state to another in nature.

The cycling affords water to in solid, liquid and the vapor form.

From the cycle show, W represents precipitation.

  • During precipitation, water in the atmosphere begins to fall.
  • U is evaporation
  • X is transpiration.
  • V is the condensation.
3 0
2 years ago
Read 2 more answers
A saturated solution is made by dissolving 0.327 g of a polypeptide (a substance formed by joining together in a chainlike fashi
faust18 [17]

Answer: The approximate molecular mass of the polypeptide is 856 g/mol

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=iMRT

Or,

\pi=i\times \frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Volume of solution in L)}}\times RT

where,

\pi = osmotic pressure of the solution = 4.19 torr

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (polypeptide) = 0.327 g

Volume of solution = 1.70 L

R = Gas constant = 62.364\text{ L.torr }mol^{-1}K^{-1}

T = temperature of the solution = 26^oC=[273+26]K=299K

Putting values in above equation, we get:

4.19torr=1\times \frac{0.327}{\text{Molar mass of solute}\times 1.70}\times 62.364\text{ L.mmHg }mol^{-1}K^{-1}\times 299K\\\\\text{molar mass of solute}=856g/mol

Hence, the molar mass of the polypeptide is 856 g/mol

8 0
3 years ago
I BEG YOU I NEED IT TILL 12 PLEASE ILL GIVE THE BRAINLEST AND HEARTS AND POINTS HELP PLEASEEEE !!!!!!!!!!!!!!!!!!!!!!!!!
Lubov Fominskaja [6]
UHHHHHHHH IDRK TRY THE LINK ABOVE
3 0
3 years ago
Read 2 more answers
Other questions:
  • Be sure to answer all parts. Which product(s) form(s) at each electrode in the aqueous electrolysis of the following salts? Sele
    15·1 answer
  • BRAINLIEST AND 30 POINTS! concept map for four types of intermolecular forces and a certain type of bond is shown.
    5·1 answer
  • An amoeba is a one-celled organism. The cell theory states that which of the following characteristics of amoebas must be true?A
    13·1 answer
  • Which of the following statements describe constructive interference
    5·1 answer
  • What are the hazards, if any of the reactants AgNO3, and K2CrO4?
    7·1 answer
  • Hello there!
    13·1 answer
  • Who else listens to sad music and think of something there not?
    9·2 answers
  • 4. Using your knowledge of elements, compounds
    13·1 answer
  • How can the total valence electrons for an element be determined? Explain.
    10·1 answer
  • _______ are used because they're economical, easy to process, easy to transport, and the infrastructure exists for their storage
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!