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
Oduvanchick [21]
3 years ago
12

I NEED HELP, PLZZ

Chemistry
1 answer:
Valentin [98]3 years ago
8 0

Answer:

d

Explanation:

You might be interested in
Why was Einstein named after Einsteinium <br><br> This is worth 15 points <br><br> Please help.
RoseWind [281]

Einsteinium was named after Albert Einstein. It was discovered at Los Alamos. Its atomic number is 99, its symbol is Es and it is solid at room temperature. Scientists believe it is a silvery-white metal.Bohrium was named after the Danish scientist Niels Bohr.

3 0
3 years ago
Worth 13 points plzzz helpp
serious [3.7K]

The fourth one is correct yw

5 0
3 years ago
Read 2 more answers
Zinc carbonate dissolves in water to the extent of 1.12 x 10-4 g/L at 25 C. Calculate the solubility product Ksp for ZnCO3 at 25
sashaice [31]

Answer:

Ksp= 7.98 × 10^-13

Explanation:

According to the question, we are to calculate the solubility constant (Ksp) of Zinc carbonate (ZnCO3) in a dissolved solution.

The equilibrium of the reaction is:

ZnCO3 (aq) ⇌ Zn2+ (aq) + CO32- (aq)

According to this; 1 mole of Zinc carbonate (ZnCO3) dissolves to give 1 mole of Zinc ion (Zn2+) and 1 mole of carbonate ion (CO32-).

This illustrates that:

(Zn2+) = 1.12 x 10-4 g/L

(CO32-) = 1.12 x 10-4 g/L

However, 1.12 x 10-4 g/L is the solubility in mass concentration of ZnCO3, we need to convert it to molar concentration in mol/L by dividing by the relative molar mass of ZnCO3.

To calculate the molar mass of ZnCO3, we say:

Zn (65.4) + C (12) + 03 (16×3)

= 65.4+12+48

= 125.4g/mol.

Hence, molar concentration= 1.12 x 10-4 g/L / 125.4 g/mol

= 8.93 × 10^-7 mol/L.

Therefore;

Zn2+) = 8.93 x 10-7 mol/L

(CO32-) = 8.93 x 10-7 mol/L

Ksp = [Zn2+] [CO32-]

Ksp = (8.93 x 10-7) × (8.93 x 10-7)

Ksp = 7.98 × 10^-13

3 0
3 years ago
What is a segment of dna that contains a single unit of information?
pav-90 [236]
This segment is called a gene
7 0
3 years ago
Read 2 more answers
At a wastewater treatment plant, FeCl3(s) is added to remove excess phosphate from the effluent. Assume the following reactions
RoseWind [281]

Answer : The concentration of Fe^{3+} needed is, 2.37\times 10^4M

Explanation :

First we have to calculate the mole of phosphate.

As we are given that, 1 mg P/L that means, 1 mg of phosphate present in 1 L of solution.

\text{Moles of phosphate}=\frac{\text{Mass of phosphate}}{\text{Molar mass of phosphate}}

Molar mass of phosphate = 94.97 g/mole

\text{Moles of phosphate}=\frac{1mg}{94.97g/mol}=\frac{0.001g}{94.97g/mol}=1.053\times 10^{-5}mol

Now we have to calculate the concentration of phosphate.

\text{Concentration of phosphate}=\frac{\text{Moles of phosphate}}{\text{Volume of solution}}

\text{Concentration of phosphate}=\frac{1.053\times 10^{-5}mol}{1L}=1.053\times 10^{-5}mol/L

Now we have to calculate the concentration of Fe^{3+}.

The second equilibrium reaction is,

FePO_4\rightleftharpoons Fe^{3+}+PO_4^{3-}

The solubility constant expression for this reaction is:

K_{sp}=[Fe^{3+}][PO_4^{3-}]

Given: K_{sp}=\frac{1}{4}

\frac{1}{4}=[Fe^{3+}]\times 1.053\times 10^{-5}mol/L

[Fe^{3+}]=2.37\times 10^4M

Thus, the concentration of Fe^{3+} needed is, 2.37\times 10^4M

8 0
4 years ago
Other questions:
  • In the following chemical equation, identify the products and reactants and indicate whether or not the equation is balanced. If
    9·1 answer
  • How is a niche different than a habitat?
    15·1 answer
  • What are the chemical properties properties of spray paint?
    8·2 answers
  • A 569324 mL NaCl solution is diluted to a volume of 1.33 L and a concentration of 4.87 M. What was the initial concentration? Gi
    15·1 answer
  • Green plants need light in order to survive Structures in the leaves absorb light, which in turn, helps plants make their
    15·1 answer
  • Why might changes to an environment cause an organism’s population to decrease?
    10·1 answer
  • What can you do to help your mind evolve?
    11·2 answers
  • Which of the following are properties of acids? Choose all correct answers.
    6·1 answer
  • Which of these is NOT part of the nervous system?
    14·2 answers
  • 2.Which of the following is NOT an example of compound?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!