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
Artist 52 [7]
2 years ago
9

For fish to survive in your aquarium, you need to have a saturated solution of oxygen in the water. Suppose your aquarium holds

250L of water. How many grams of oxygen do you need to pump into the tank?
Chemistry
1 answer:
solmaris [256]2 years ago
7 0

Answer:

The mass of oxygen needed to be pumped in the aquarium is 10 g

Explanation:

Here the value of the degree of solubility of oxygen in water is sought

The solubility of oxygen in fresh water is approximately 1.22 × 10⁻³ mol·dm⁻³ which is equivalent to approximately 40 mg/L

The volume of water the aquarium holds = 250 L

The mass of oxygen required = The solubility of oxygen in water × (The volume of water in the aquarium)

Therefore, the mass of oxygen needed to be pumped in the aquarium = 40 mg/L × 250 L = 10,000 mg

1,000 mg = 1 g

∴ 10,000 mg = 10 g

The mass of oxygen needed to be pumped in the aquarium = 10,000 mg = 10 g.

You might be interested in
A sample of metal is heated until it melts and begins to glow red. When it cools, it appears the same color as it did before it
frosja888 [35]

Answer:

Explanation:

trueeeeeeeeeeeeeeeeeeeeeeeeeee

8 0
3 years ago
True are false Selective breeding is a type of genetic engineering.
musickatia [10]

Answer:

true

Explanation:

it always an enginering

8 0
3 years ago
Read 2 more answers
Is iron oxide an insulator or conductor?
balu736 [363]

Answer:

It's a conductor

Explanation:

3 0
3 years ago
How much time would it take to distribute one avagadro's number of wheat grains if 10^10 grains are A)1.9*10^2 years B)1.9*10^10
Makovka662 [10]

Answer:

It takes  1.9 \times 10^{6} years to distribute all the grains.

Explanation:

In one second, 10^{10} grains of wheat are distributed.

We are supposed to find the time it would take to Distribute Avogadro number of grains.

1 avogadro number = 6.022 \times 10^{23}

Number of grains distributed in 1 day = 86400 \times 10^{10}

                                                             = 8.64 \times 10^{14}

Number of grains distributed in 1 year= 8.64 \times 10^{14} \times 365

                                 = 3.1536 \times 10^{17}

Time taken = \frac{Number of grains to be distributed}{grains distributed in 1 year}

            = \frac {6.022 \times 10^{23}}{3.1536\times 10^{17}}

            = 1.9 \times 10^{6}

7 0
3 years ago
<img src="https://tex.z-dn.net/?f=H_2PO_4%5E-%28aq%29%20%5Crightarrow%20H%5E%2B%28aq%29%20%2B%20HPO_4%5E%7B2-%7D%28aq%29" id="Te
klasskru [66]

Answer:

The pH of the buffer solution = 8.05

Explanation:

Using the Henderson - Hasselbalch equation;

pH = pKa₂ + log ( [HPO₄²-]/[H₂PO4⁻]

where pKa₂ = -log (Ka₂) = -log ( 6.1 * 10⁻⁸) = 7.21

Concentration of OH⁻ added = 0.069 M (i.e. 0.069 mol/L)

[H₂PO4⁻] after addition of OH⁻ = 0.165 - 0.069 = 0.096 M

[HPO₄²-] after addition of OH⁻ = 0.594 + 0.069 = 0.663 M

Therefore,

pH = 7.21 + log (0.663 / 0.096)

pH = 7.21 + 0.84

pH = 8.05

4 0
3 years ago
Other questions:
  • How many grams of nitroglycerin are needed to produce 25.0 grams of CO2
    11·1 answer
  • a spherical sample has a mass of 2.813g. it has a diameter of 8.0mm. what is the sphere made of (determined by its density as g/
    7·1 answer
  • Considering that catalysts are not consumed in a reaction, how do you think increasing the amount of catalyst would affect the r
    13·2 answers
  • Which of the following is NOT a symbol for an element? H Li Pb HF
    7·2 answers
  • How many grams of CaCl2 should be dissolved in 633.1 mL of water to make a 0.35 M solution of CaCl2?
    12·1 answer
  • Balancing chemical reactions is consistent with which scientific law?
    6·1 answer
  • What is the empirical formula of a compound that contains 6.10 g of hydrogen and 28 g of nitrogen?
    9·1 answer
  • Air masses carry their own weather.<br> True<br> False<br> The question is number 8
    7·1 answer
  • What is the symbol of element Californium?
    15·2 answers
  • Describe at least four properties of electrons that
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!