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
juin [17]
2 years ago
13

Calculate the concentration in % (m/m) of a solution containing 30.0g of mgcl2 dissolved in 270.0g of h20

Chemistry
1 answer:
qaws [65]2 years ago
4 0
As the question tells you, you need to use the formula

% mass= mass of solute/ mass of solution x 100

mass solute= 30.0 g
mass of solution= 30.0 + 270.0= 300.0 g

% mass= 30.0/ 300.0 x 100= 10%

answer is B
You might be interested in
What is the volume of 1.56 kg of a compound whose molar mass is 81.86 g/mole and whose density is 41.2 g/ml?
hjlf

Answer:

v = 37.9 ml

Explanation:

Given data:

Mass of compound = 1.56 kg

Density = 41.2 g/ml

Volume of compound = ?

Solution:

First of all we will convert the mass into g.

1.56 ×1000 = 1560 g

Formula:

D=m/v

D= density

m=mass

V=volume

v = m/d

v =  1560 g / 41.2 g/ml

v = 37.9 ml

7 0
3 years ago
Please help me!!!!!!!!!!!!!
Verizon [17]

double-displacement reaction

Explanation:

We have the chemical reaction:

Na₂S (aq) + Cd(NO₃)₂ (aq) → CdS (s) + 2 NaNO₃ (aq)

where:

(aq) - aqueous

(s) - solid

This is a double-displacement reaction because the reactants exchange atoms or group of atoms between themselves to form the products. To drive the reaction to the right, one of the products is a precipitate.

Generally we can express the double-displacement reaction as following:

AB + CD → AC + BD

Learn more about:

types of chemical reactions

brainly.com/question/13824617

#learnwithBrainly

3 0
2 years ago
BRAINLIEST TO FIRST CORRECT ANSWER, THANKS!
Tamiku [17]

Answer:

increased

Explanation:

Consuming a compound increases the concentration. When you increase the concentration, the rate constant for that reaction also increases.

5 0
3 years ago
When the molecules of gases are heated, the average kinetic energy of the molecules increases,
serious [3.7K]
True is the answer to this
6 0
3 years ago
What is the process where plants make seeds that grow into new plants
Verdich [7]
This Process is called fertilization
8 0
2 years ago
Read 2 more answers
Other questions:
  • 28.5g of iron shot is added to a graduate cylinder containing 45.50 mL of water. The water level rises to the 49.10 mL , From th
    8·1 answer
  • Based on the hierarchical organization, order these terms from smallest to largest.
    5·2 answers
  • A person uses 770 kcal on a long hike. Calculate the energy used for the hike in each of the following energy units.
    9·1 answer
  • PLEASE HELP MEEEEE
    7·2 answers
  • Air is made of seperate molecules of Oxygen, Nitrogen, and Carbon Dioxide. Is the air a pure substance or a mixture? Explain.
    8·1 answer
  • The specific heat capacity of silver is 0.24 J/°C ·g.
    12·1 answer
  • g A high altitude balloon is filled with 1.41 x 104 L of hydrogen gas (H2) at a temperature of 21oC and a pressure of 745 torr.
    7·1 answer
  • The repeating subunits that are responsible for the chance of a crystal are know as
    8·1 answer
  • For each system listed in the first column of the table below, decide (if possible) whether the change described in the second c
    10·1 answer
  • How many molecules of CH4 are in 24.1 g of this compound?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!