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
Kruka [31]
4 years ago
14

1. Replace ? with a whole number to make the statements true.

Chemistry
1 answer:
Ira Lisetskai [31]4 years ago
5 0
<span>1.) a. 20 ÷ 4 ? means ? × 4 = 20     </span>→ replace ? with 5.<span>
b. 2,725 ÷ 5 ? means ? × 5 = 2,725  </span>→ replace ? with 545<span>
c. ? ÷ 5 = 0 </span>→ replace ? with 0.

2) 1,475 / 25 = 59
They used 59 boxes for this year.

3) 18 per haircut ; 70 per perm
4,608 = 18h + 70(36)
4,608 - 2,520 = 18h
2,088 = 18h
2,088/18 = h
116 = h
Grace did 116 haircuts.

4) 575 + 13(118) = 575 + 1,534 = 2,109 total expense.

5) 2,240 miles / 320 miles = 7 tanks of gas used.
7 tanks * 39 = 273 cost of the gas used.

You might be interested in
45.5 g of ice is heated from -25 degrees celsius to 150 degrees celcius. Calculate the total amount of heat required for the ent
tino4ka555 [31]

Answer:

Q = 16163.88 Joules

Explanation:

Given the following data;

Initial temperature, T1 = -25°C

Final temperature, T2 = 150°C

Mass = 45.5 g

Specific heat capacity of ice = 2.03 J/g°C

To find the quantity of heat required;

Heat capacity is given by the formula;

Q = mcdt

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 150 - (-25)

dt = 150 + 25

dt = 175°C

Substituting into the formula, we have;

Q = 45.5 * 2.03 * 175

Q = 16163.88 Joules

4 0
3 years ago
a stock solution has a concentration of 0.30 m clo2 and is diluted to become a 0.20 m solution with a volume of 0.050 l. what wa
Pavlova-9 [17]

The stock solution has a volume of 0.208L. When diluted, a stock solution with a concentration of 0.30 m clo2 becomes a 0.20 m stock solution with a volume of 0.050.

A three-dimensional space's occupied volume is measured. It is frequently measured numerically with SI-derived units (such the cubic metre and litre) or with other imperial units (such as the gallon, quart, cubic inch). Volume and length are related in how they are defined (cubed).

A highly concentrated stock solution, often prepared as a 10x concentrated solution, can be described as a stock solution since it can be diluted to create a working solution. In order to prepare complex solutions with numerous constituents, stock solutions can also be utilized as a component.

0.3M*v = 0.125M*0.50L

V=0.208L

Learn more about stock solution here

brainly.com/question/28083950

#SPJ4

4 0
1 year ago
WHAT TYPE OF WAVE IS SHOWN? (view picture)
drek231 [11]

Answer:

b

Explanation:

3 0
4 years ago
Read 2 more answers
Which atoms likely to react ? PLS HELPP
Irina18 [472]

Answer:

i can't, it's blocked

Explanation:

8 0
3 years ago
A particular brand of gasoline has a density of 0.737 g/ml at 25 ∘c. how many grams of this gasoline would fill a 13.0 gal tank
Usimov [2.4K]

Density of gasoline is 0.737 g/mL and volume of tank is 13.0 gal.

Since, 1 US gal=3.78 L

Volume of tank in L will be:

V=13.0 gal(\frac{3.78 L}{1 gal})=49.14 L

Also, 1 L=1000 mL

Thus,

V=49.14 L(\frac{1000 mL}{1 L})=49140 mL

Mass of gasoline can be calculated as follows:

m=d×V

Here, d is density and V is volume thus,

m=0.737 g/mL\times 49140 mL=3.62\times 10^{4}g

Therefore, mass of gasoline will be 3.62\times 10^{4}g.

7 0
3 years ago
Other questions:
  • Given the equation representing a reaction at equilibrium:
    5·1 answer
  • A chemist determines by measurements that 0.0850 moles of oxygen gas participate in a chemical reaction. Calculate the mass of o
    13·1 answer
  • He table below lists some acids and bases. Strong acids Weak acids Weak bases Strong bases HBr CH3COOH NH3 NaOH HNO3 HCOOH NH4OH
    11·2 answers
  • To do an experiment with the peptide H-A-P-P-Y you need to make two buffers. One where the peptide has a net negative charge (Bu
    10·1 answer
  • Calculate the atomic mass of the element
    12·1 answer
  • Para preparar el almuerzo en una cocina de gas se necesitan 12000 kJ, ¿cuánto dinero nos cuesta preparar una comida en una cocin
    10·1 answer
  • The following statements were stated by a politician who was paid by the nuclear energy lobby in a debate in favor of nuclear en
    14·1 answer
  • Plsss help ASAP!!!<br> BRAINLIEST
    11·2 answers
  • How can liquid water become hot enough to alter the chemistry of a rock without vaporizing?
    14·2 answers
  • Examples of errors in colorimetry experiments
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!