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
EleoNora [17]
3 years ago
7

A 10.00 mL sample of a 1.07 M solution of potassium hydrogen phthalate (KHP, formula mass = 204.22 g/mol) is diluted to 250.0 mL

. What is the molarity of the final solution?
Chemistry
1 answer:
ser-zykov [4K]3 years ago
8 0

Answer:

[KHP] = 0.0428M

Explanation:

2 methods to calculate concentration after dilution

1. Use dilution equation

Molarity of concentrate (M₁) x Volume of Concentrate (V₁)

           =    Molarity of dilute (M₂) x Volume of dilute (V₂)

M₁ x V₁ = M₂ x V₂ => M₂ = M₁ x V₁ / V₂ = (1.07M)(10ml)/(250ml) = 0.0428M

2. Concentration Equation

moles KHPh = Molarity (M)  x  Volume (V) = 1.07M x 0.010L =0.0107 moles KHP

Concentration KHP = moles solute / volume of solution in Liters

= 0.0107 moles KHP / 0.25L = 0.0428M

You might be interested in
Please please help me i’m so confused! i will give brainleiest answer
pochemuha

Answer:

PLEASE MARK AS BRAINLIEST!!

Explanation:

Calcium has an atomic number of 20 and an atomic mass of 40

The mass number of an isotope is the sum of the number of protons and neutrons in the atomic nucleus. The atomic number is the number of protons. The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons.

7 0
3 years ago
In the reaction
NemiM [27]

Answer:

3 moles of CO are needed

Explanation:

Given data:

Number of moles of CO used = ?

Mass of Fe produced = 112 g

Solution:

Chemical equation:

Fe₂O₃ + 3CO      →        2Fe + 3CO₂

Number of moles of Fe:

Number of moles = mass/ molar mass

Number of moles = 112 g/ 55.85 g/mol

Number of moles = 2.00 mol

Now we will compare the moles of iron and CO.

                   Fe        :         CO

                   2          :         3

Thus, 3 moles of CO are needed.

6 0
2 years ago
When an atom is netural the number of the ? and ? are the same <br><br> 7TH GRADE SCIENCE
Effectus [21]

protons and electrons are the same

5 0
3 years ago
Read 2 more answers
PLEASE HELP ITS MAJOR
Charra [1.4K]

Answer:

solid, liquid

Explanation:

solid liquid and gas are the three most common states of matter, my best guessstimation is that solid is the ¨normal form¨ with you having to then heat it up to get to gas or, change it to liquid... even though most of the earth is liquid soo it could also be liquid try your best and think it over

3 0
2 years ago
Read 2 more answers
What is the energy of an electron in the hydrogen atom determined by?
mezya [45]

Answer:

The energy of a hydrogen atom's electron is determined by which principal quantum number n value corresponds to the energy state the electron occupies. where n=1,2,3,... is the quantum number that quantizes the energy levels. That is, they are discrete energy values proportional to 1n2 .

Explanation:

6 0
3 years ago
Other questions:
  • 7.744 Liters of nitrogen are contained in a container. Convert this amount to grams.
    15·1 answer
  • If a feather was trapped in mud and the impression was preserved over time, a(n) _________ fossil would be formed.
    12·2 answers
  • Nitrogen has an atomic mass of about 14 amu and an atomic number of 7. How many neutrons does nitrogen have?
    12·2 answers
  • What was thompson working with when he discovered the cathode rays
    8·2 answers
  • Four type of molecular models
    9·1 answer
  • Urgent plzz help meeee thx I HAVE EXAMEEE
    9·1 answer
  • How many moles of H20 are produced by 4.8 moles of O2?<br> 2H2 +O2 -----&gt; 2H20
    15·1 answer
  • I need help plzzzzzz​
    13·2 answers
  • Please can someone help me on number 4 please it due today at 7:20pm please please help me will mark the brainiest please please
    13·2 answers
  • Which two kingdoms are the only prokaryotes
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!