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3 years ago

Why are we measuring the bubbles to determine the rate of photosynthesis?

1 answer:

6 0

You measure the bubbles because oxygen is produced during photosynthesis so therefore by measuring the bubbles if you increase the water level you would see the rats of photosynthesis increase

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A radiator contains 10 quarts of fluid, 30% of which is antifreeze. how much fluid should be drained and replaced with pure anti

amm1812

Let x be the volume of fluid removed and the volume of pure antifreeze that is added. The concentration of antifreeze in the fluid is 0.3, the concentration in pure antifreeze is 1 and that in the final solution is 0.4 The volume of the final solution is 10.
(10 - x)(0.3) + x = 10(0.4)
0.3 + 0.7x = 0.4
x = 1/7 quarts

The volume that should be drained is 1/7 quarts

3 0

3 years ago

Read 2 more answers

Determine the volume of a 0.800 M K2Cr2O7 solution required to completely react with 4.24 g of Cu.

Pachacha [2.7K]

Answer: The volume of solution required is 0.0275 L.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of copper = 4.24 g

Molar mass of copper = 63.55 g/mol

Putting values in above equation, we get:

$\text{Moles of copper}=\frac{4.24g}{63.55g/mol}=0.067mol$

The chemical equation for the reaction of potassium dichromate and copper follows:

$K_2Cr_2O_7+3Cu+7H_2SO_4\rightarrow 3CuSO_4+Cr_2(SO_4)_3+K_2SO_4+7H_2O$

By Stoichiometry of the reaction:

3 moles of copper reacts with 1 mole of potassium dichromate.

So, 0.067 moles of copper will react with = $\frac{1}{3}\times 0.067=0.022mol$ of potassium dichromate

To calculate the volume of potassium dichromate, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

We are given:

Moles of potassium dichromate = 0.022 mol

Molarity of solution = 0.800 M

Putting values in above equation, we get:

$0.08mol/L=\frac{0.022mol}{\text{Volume of solution}}\\\\\text{Volume of solution}=0.0275L$

Hence, the volume of solution required is 0.0275 L.

6 0

3 years ago

Given the following data on a 6 foot tall, 210 pound male, perform the appropriate calculations and evaluate the values related

sladkih [1.3K]

A correct B incorrect C incorrect E correct

3 0

3 years ago

Nitrogen and hydrogen gases react to form ammonia gas as follows:

Mama L [17]

first of all by using Gay Lussac Volume
1L of N2 reacts with 3L of H2
so that it can give 2L of NH3
so1.2L of N2 reacts with 3.6L of H2
so that it can give 2.4L of NH3 at same temp and pressure
hope it helps

6 0

4 years ago

How many atm are in 1,520 mmHg?

Brums [2.3K]

In 1 atm there is 760 mmHG, so if you divide 1,520 by 760 you get a total of 2 atm. So the answer is 2 atm in 1520 mmHg.

6 0

3 years ago

Read 2 more answers