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
vaieri [72.5K]
3 years ago
11

How many mL of a 4% mass/volume Mg(NO3)2 solution would contain 1.2 grams of magnesium nitrate?

Chemistry
1 answer:
Phoenix [80]3 years ago
7 0
4% mass / volume :

4 g ---------> 100 mL
1.2 g ------- ? mL

V = 1.2 * 100 / 4

V = 120 / 4

V = 30 mL

hope this helps!

You might be interested in
Please help !!
ipn [44]

<u>Answer:</u>

<u>For 2:</u> The % yield of the product is 92.34 %

<u>For 3:</u> 12.208 L of carbon dioxide will be formed.

<u>Explanation:</u>

  • <u>For 2:</u>

The percent yield of a reaction is calculated by using an equation:

\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100              ......(1)

Given values:

Actual value of the product = 78.4 g

Theoretical value of the product = 84.9 g

Plugging values in equation 1:

\% \text{yield}=\frac{78.4 g}{84.9g}\times 100\\\\\% \text{yield}=92.34\%

Hence, the % yield of the product is 92.34 %

  • <u>For 3:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(2)

Given mass of carbon dioxide = 24 g

Molar mass of carbon dioxide = 44 g/mol

Plugging values in equation 1:

\text{Moles of carbon dioxide}=\frac{24g}{44g/mol}=0.545 mol

<u>At STP conditions:</u>

1 mole of a gas occupies 22.4 L of volume

So, 0.545 moles of carbon dioxide will occupy = \frac{22.4L}{1mol}\times 0.545mol=12.208L of volume

Hence, 12.208 L of carbon dioxide will be formed.

5 0
3 years ago
Three compounds that contain elements from Group 16 are SeO2F2 , SeOF2,
egoroff_w [7]

Answer:

A

Explanation:

A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity(Wikipedia).

The formal charge on an atom in a molecule reflects the electron count associated with the atom compared to the isolated neutral atom(University of Calgary).

Looking at all the structures listed A-E for SeO2F2, only structure A minimizes the formal charges for each atom in SeO2F2.

4 0
2 years ago
Dry ice, CO2(s), does not melt at atmospheric pressure. It sublimes at a temperature of −78 °C. What is the lowest pressure at w
kirill115 [55]
You need to use the equation PV = nRT

The only “trick” in these problems is you need to use the correct UNITS. Especially for the “R” value.

If you get the units (eg temps in Celsius or Kelvin) corresponding to the correct “matching” units of the other variables.

You need to convert the temp into Kelvin first
4 0
2 years ago
How do we know the car has moved
Anuta_ua [19.1K]

Answer:

We need more information to solve this question. Take a picture of the problem and post it and I will try to help.

Explanation:

8 0
3 years ago
Why does asexual reproduction result in offspring with identicle genetic variation
iris [78.8K]
There is only one parent so the genes don’t change.
7 0
3 years ago
Read 2 more answers
Other questions:
  • HELP WITH SCIENCE ASAP!
    6·1 answer
  • The chart indicates the time, speed, and velocity of five runners.
    6·1 answer
  • The same heat transfer into identical masses of different substances produces different temperature changes. Calculate the final
    14·1 answer
  • Answer question number 7
    6·2 answers
  • A jet is goes from 180km/s to 139km/s in 22 seconds. What is it's acceleration?
    10·1 answer
  • Please help I will give brainiest
    11·2 answers
  • Help! Need it ASAP!<br> Is steam and vapour different? If they are then how are they different?
    6·2 answers
  • Anyone can help me in science assignment
    10·2 answers
  • The primary role of the nervous system is to:
    6·1 answer
  • Why does water evaperate
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!