CHEMISTRY MIDDLE SCHOOL

Can you solve the anagramscduopomn                                  
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Answers

Answer 1
Answer: Compound
Property
Molecule
Magnet
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Find the molarity of a 450 mL solution containing 13.7 g of ZnSO4.​

Answers

Answer:

The molarity is 0.189 (moles)/(liter)

Explanation:

Molarity is a measure of concentration of a solution that indicates the number of moles of solute that are dissolved in a given volume. In other words, the molarity indicates the amount of moles of solute that appear dissolved in each liter of the mixture.

Molarity is determined by the expression:

Molarity (M)=(number of moles of solute)/(Volume)

Molarity is expressed in units ((moles)/(liter)).

So, you need to know the amount of moles of ZnSO₄. Then you must know the molar mass. If:

  • Zn: 65 g/mol
  • S: 32 g/mol
  • O: 16 g/mol

the molar mass of ZnSO₄ is:

ZnSO₄= 65 g/mol + 32 g/mol + 4* 16 g/mol= 161 g/mol

Then you can apply a rule of three as follows: if 161 g of ZnSO₄ is contained in 1 mole, 13.7 g in how many moles are they?

moles=(13.7 g*1 mole)/(161 g)

moles=0.085

Then you know:

  • number of moles of solute= 0.085 moles
  • Volume= 450 mL (Being 1 L=1,000 mL)

Replacing in the definition of molarity:

Molarity= (0.085 moles)/(0.45 L)

Molarity=0.189 (moles)/(liter)

The molarity is 0.189 (moles)/(liter)

Which of the following statements does not describe a physical property of a piece of chalkA. Chalk is solid
B.chalk can be broken into pieces 
C. Chalk is white
D. Chalk will bubble in vinegar

Answers

D.) Chalk will bubble in vinegar.
This is a chemical property, not a physical property.

Which question would most likely be studied by a physicist

Answers

Answer:

how does gravity affect something

Explanation:

they study  physics.

hope this helped

Is it okay for a 13 yr old girl to ask out a 16 yr old boy if they really like them?..

Answers

No, because a child under the age of 16 does not have the right to engage in such relationships and it's punishable by law if the relationship becomes intimate.

no that is inappropriate he could go to jail!

why does the amount of energy received from a small light source decrease as the distance from the light source increase

Answers

The light has to travel farther when the the distance increases which means the light is being scattered by the particles in the air.

a solution in which 50 grams of solute is dissolved in 250 grams of solution has a concentration of what percent?

Answers

16.66667% or 17% to the nearest percent. (50/(250+50)) x 100 or (50/300) x 100. I hope you can see how I got to those numbers.
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1. What two quantities must be known to calculate the density of a sample of matter?A. color and massB. mass and volumeC. length and massD. solubility and mass
Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil.
Which compound of an element in period 3 reacts with water to form a solution with a pH greater than 7?A. SiO2B. SiCl4C. NaClD. Na2O