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
Sveta_85 [38]
3 years ago
5

100 POINTS PLEASE HELP (PHOTOS INCLUDED)

Chemistry
2 answers:
Anton [14]3 years ago
7 0

Moles of solute be x

#1

  • Volume of solution=100mL=0.1mL
  • Molarity=0.7M

\\ \rm\Rrightarrow Molarity=\dfrac{Moles\:of\:solute}{Volume\:of\'solution}

\\ \rm\Rrightarrow 0.7=\dfrac{x}{0.1}

\\ \rm\Rrightarrow x=0.1(0.7)

\\ \rm\Rrightarrow x=0.07mol

#2

Same like before

  • Volume of solution=5.5L
  • Molarity=0.4M

\\ \rm\Rrightarrow \dfrac{x}{5.5}=0.4

\\ \rm\Rrightarrow x=5.5(0.4)

\\ \rm\Rrightarrow x=2.20mol

pshichka [43]3 years ago
6 0

Answer:

Explanation:

3.

Knowns: 100mL of solution; concentration of 0.7M

Unknown: number of moles

Equation: number of moles = volume * concentration

Plug and Chug: number of moles = 100/1000 * 0.7 = 0.07 mole

Final Answer: 0.07mole

2.

Knowns: 5.50L of solution; concentration of 0.400M

Unknown: number of moles

Equation: number of moles = volume * concentration

Plug and Chug: number of moles = 5.5 * 0.4 = 2.20 mole

Final Answer: 2.20 mole

You might be interested in
Can you name a noteworthy incident in french history that happened at the time of Nicolas Appert death???
liq [111]
Research the July Monarchy, and the beggining of the Second Republic. That should help out.
6 0
3 years ago
A sample of water vapor has a volume of 3.15 L, a pressure of 2.40 atm, and a temperature of 325 K. What is the new temperature,
lara31 [8.8K]

Answer:

The answer to your question is:   T2 = 235.44 °K

Explanation:

Data

V1 = 3.15 L                    V2 = 2.78 L

P1 = 2.40 atm               P2 = 1.97 atm

T1 = 325°K                    T2 = ?

Formula

\frac{P1V1}{T1} = \frac{P2V2}{T2}

Process

            T2 = (P2V2T1) / (P1V1)

            T2 = (1.97x 2.78x 325) / (2.40 x 3.15)

            T2 = 1779.895 / 7.56

            T2 = 235.44 °K

4 0
3 years ago
What happens to the temperature and density of the material between points B and C?
makvit [3.9K]

Answer:

Temperature decreases and density increases

Explanation:

Let us remember that density of a material increases as the temperature of the material decreases. So the cooler a material becomes, the denser it becomes also.

Between points B and C, the material rapidly cools down and the temperature decreases accordingly. This ultimately results in an increase in density since cooler materials are denser than hot materials.

7 0
3 years ago
What is the percent by mass of carbon in acetone c3h6o
Volgvan

Well, the molar mass of acetone would be

3(12.011)+6(1.008)+15.999 , which cleans up to be 58.08 grams.

out of this total, 3(12.011), or 36.033 grams are carbon

So, to find the percent, you do part over whole

36.033/58.08, which equals 0.6204 with significant figures

multiply that by 100 to get 62.04%

Hope that helps!

7 0
3 years ago
Read 2 more answers
An experiment in a general chemistry laboratory calls for a 2.00 M solution of HCL. How many mL of 11.9 M HCL would be required
Annette [7]

<u>Answer:</u> The volume of concentrated solution required is 42 mL

<u>Explanation:</u>

To calculate the molarity of the diluted 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:

M_1=11.9M\\V_1=?mL\\M_2=2.0M\\V_2=250mL

Putting values in above equation, we get:

11.9\times V_1=2.0\times 250\\\\V_1=42mL

Hence, the volume of concentrated solution required is 42 mL

3 0
3 years ago
Other questions:
  • Which one of the following molecules has an atom with an incomplete octet? A. BF3 B. GeH4 C. NF3 D. AsCl3 E. H2O
    12·1 answer
  • 4) A metal cylinder is placed in a graduated cylinder which has been filled with
    9·1 answer
  • Which group of nuclear emissions is listed in order of increasing charge?
    9·2 answers
  • 9.Which part of the conductivity apparatus should you never touch
    6·2 answers
  • Pls Help!!!
    11·2 answers
  • Which units express specific heat capacity?
    14·2 answers
  • 5) The work done on the surroundings by the expansion of a gas is w = -PAV.(T/F)
    15·1 answer
  • What are the 4 sub levels and how many electrons can fit into each
    11·1 answer
  • At what temperature do KCl and NaCl have the same solubility?
    12·1 answer
  • Which of the following metals can be extracted in its native state from the earth?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!