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
Allushta [10]
3 years ago
11

What mass of Ca(NO3)2 must be dissolved in 726.0 g of water to prepare a 0.200 m solution? Use molar masses with at least as man

y significant figures as the data given.
Chemistry
1 answer:
sashaice [31]3 years ago
8 0

Answer:

The answer to your question is 22.4 g of Ca(NO₃)₂

Explanation:

Data

mass of Ca(NO₃)₂ = ?

mass of water = 726 g

concentration = 0.2 m

Process

In Chemistry, there are two main units of concentration Molarity (M) and Molality (m). In this problem concentration is "m" then I will calculate molality.

1) Formula

   molality = moles / mass of solvent

2.- Solve for moles

   moles = molality x mass of solvent

-Substitution

   moles = (0.2) x (0.726)

-Simplification

   moles = 0.1452

3.- Convert moles to grams

Molar mass of Ca(NO₃)₂ = 40 + (14 x 2) + (6 x 16)

                                       = 40 + 18 + 96

                                       = 154 g

              154 g of Ca(NO₃)₂ ---------------- 1 mol

                 x                          ---------------- 0.1452 moles

                                    x = (0.1452 x 154) / 1

                                    x = 22.4 g of Ca(NO₃)₂

You might be interested in
2. What group is Ballardium located? (Bu) *
elena-14-01-66 [18.8K]

Answer:

This question appears incomplete

Explanation:

There is no such element known as "Ballardium (Bu)" in the periodic table. However, there are elements with a bit of similarity in spellings and pronunciation such as Beryllium (Be) which is found in group 2 (meaning it is an alkali earth metal), Berkelium (Bk) which is an actinide (meaning it is radioactive) and Vanadium (V) which is found in group 5 of the periodic table (meaning it's a transition metal).

5 0
2 years ago
Where does the equilibrium point occur in a reaction system?
Ymorist [56]
Equilibrium occurs when the rate of the forward reaction is the same as the rate of the reverse reaction. This doesn't necessarily mean the concentrations or pressure are the same on both sides of the equation, only the rates are the same
8 0
3 years ago
If 3.06 grams of ammonia (NH₃) react with 0.0350 moles of chromium (III) nitrate as noted by the following equation, what is the
Lady bird [3.3K]
What is the answer to this question
3 0
2 years ago
Calculate the mean kinetic energy {e1rans) in joules of the following molecules at 350 k: (a) he, (b) co2, and (c) uf6. explain
Lady bird [3.3K]

The mean kinetic energy per molecule is , where  is the Boltzmann constant and T is the absolute temperature.

So at 1000°C, the T = 1273.15 K, kB=1.38 × 10-23, therefore the mean kinetic energy is 2.635 × 10⁻²⁰J.

<h3><u>What is Kinetic energy ?</u></h3>

The energy an item has as a result of motion is known as kinetic energy.

A force must be applied to an item in order to accelerate it. We must put forth effort in order to apply a force. After the job is finished, energy is transferred to the item, which then moves at a new, constant speed. Kinetic energy is the type of energy that is transmitted and is dependent on the mass and speed attained.

Kinetic energy may be converted into other types of energy and transported between things. A flying squirrel may run into a chipmunk that is standing still, for instance. Some of the squirrel's original kinetic energy may have been transferred to the chipmunk or changed into another kind of energy after the impact.

To view more about kinetic energy, refer to;

brainly.com/question/2972267

#SPJ4

4 0
1 year ago
Can a pressure change shift the equilibrium position in every reversible reaction? Explain
Juliette [100K]
Jakdiiucuwjabbzahqhahs
4 0
3 years ago
Other questions:
  • What is the heat of reaction H2 + 1/3N2 2/3NH3
    10·1 answer
  • what kind of change occurs when sodium and chlorine combine ? Describe the matter before and after the change
    7·1 answer
  • Tempature really is a measure of the ?? or the particles in any material
    6·1 answer
  • a person drinks eight glasses of water each day, if each glass contains 300mL how many liters of water does a person drink in a
    15·1 answer
  • When interviewed, Mr. Harrison was discussing barometric pressure and the low-pressure system moving in that may cause a change
    11·2 answers
  • "Two major varieties of igneous rock are _______ and ________. What is the difference between these two types of igneous rock?"
    7·1 answer
  • The speed of light in a vacuum is approximately 299,500,000 meters per second. In scientific notation, we can write this number
    7·1 answer
  • Moles in 72 grams of NaHCO3
    13·1 answer
  • What is the definition of an Isomer?
    12·2 answers
  • The graph below shows how the pH of the soil in
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!