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
gladu [14]
3 years ago
15

Nic bought 12 pens for 2$ each and 12pads of paper for 3$ each. Write two expressions for how nic could calculate his total.Writ

e one expression in expanded form and one in factored form.
Chemistry
1 answer:
DENIUS [597]3 years ago
7 0
12 pens for writing chemical formulas cost
12*2=24 dollars
12 pads cost
12*3=36 dollars
1)
12*2=24
12*3=36
2)
12*2+12*3=60 dollars
3) 12*(3+5)=60 dollars

You might be interested in
Why is dissolving salt in water is a physical change? Help me please
svlad2 [7]

it is a great change because the salt goes in and turn the water to salt water

7 0
3 years ago
Read 2 more answers
What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 ​ h 8 ​ ) (density = 0.867 g/ml) to a 250 m
Virty [35]

Answer:

2.48 mol/L.

Explanation:

  • The molarity of the solution can be expressed as <em>the number of moles of solute in 1.0 liter of the solution, </em>(M = n / V).
  • It is also can be calculated from the relation:

<em>M = (mass / molar mass) solute x (1000 / V of solution)</em>

The solute is toluene and the solvent is benzene.

mass of toluene (solute) = 57.1 g,

molar mass of toluene (solute) = 92.14 g/mol.

volume of the solution = 250 ml.

∴ M =  (mass / molar mass) solute x (1000 / V of solution) = [(57.1 g / 92.14 g/mol) x (1000 / 250 ml)] = 2.48 mol/L.

4 0
3 years ago
How many ml of concentrated hydrochloric acid would be required to make 1 L of a 0.2 M solution? Assume that concentrated hydroc
fgiga [73]

<u>Answer:</u> The volume of concentrated hydrochloric acid required is 16.53 mL

<u>Explanation:</u>

To calculate the volume of concentrated solution, we use the equation:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of the concentrated solution

M_2\text{ and }V_2 are the molarity and volume of diluted solution

We are given:

Conversion factor:  1 L = 1000 mL

M_1=12.1M\\V_1=?mL\\M_2=0.2M\\V_2=1L=1000mL

Putting values in above equation, we get:

12.1\times V_1=0.2\times 1000\\\\V_1=16.53mL

Hence, the volume of concentrated hydrochloric acid required is 16.53 mL

3 0
3 years ago
Rocks formed by changes in heat and pressure or the presence of hot, watery fluids
Irina18 [472]
If you're looking for "what rocks are formed by changes..." it's Igneous Rocks.
3 0
4 years ago
Read 2 more answers
______ is the use of enzymes is necessary to increase the activation energy requirements of a chemical reaction.
Masja [62]

Answer:

Catalysts

Explanation:

Catalysts lower the aviation energy.

6 0
3 years ago
Other questions:
  • Help, cant get it. Answers in picture
    11·1 answer
  • Which material does not melt at any temperature? wood, a mixture of different substances ethanol, a molecular compound sodium ch
    8·1 answer
  • Gasoline contains only hydrogen and carbon atoms, yet nitrogen oxide and nitrogen dioxide are produced when gasoline burns. What
    11·2 answers
  • 5. How many miles are there in 3.44 x 10^8 inches?
    7·1 answer
  • Please help! :)
    13·1 answer
  • As the vibration of molecules increase, the_______ of the substance increases
    8·1 answer
  • Dalton's idea that atoms cannot be divided into smaller parts was disproved by the discovery of ____.
    6·2 answers
  • Which of the following describes the energy transformations that occur when a toaster is used to make toast?
    5·2 answers
  • How do we use natural resources?
    8·2 answers
  • A steel calorimeter has a volume of 75.0 mL and is charged with Oxygen gas to a
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!