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3 years ago

3600 seconds equal how many hours

Chemistry

1 answer:

julsineya [31]3 years ago

8 0

1 second=0.000278 hours

So, 3,600 seconds × 0.000278 hours = 1 hour

Your answer is 1 hour

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PLEASE HELP!!

wariber [46]

Answer:

answer is option 2 hope it helps

8 0

3 years ago

Which solution is most dilute?

olga55 [171]

C. 0.1 M HCl

Explanation:

The solution with the lowest molarity is the most dilute of all.

This is why the choice is 0.1M of HCl.

Molarity is the same as concentration. The unit "M" denotes mole per liter volume of solution.

Molarity is defined as the number of moles of solute in a give volume of solution.
0.1M means 0.1mole of HCl is dissolved in 1liter of solvent.
The higher the number of moles dissolved and the more the concentration of the solution will be.

The order of increasing concentration is:

0.1M < 0.2M< 0.3M < 0.4M

learn more:

Molarity brainly.com/question/9324116

#learnwithBrainly

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4 years ago

CADMIUM SOLUBILITY AND pH Cadmium is a toxic metal. It can be removed from water by chemical precipitation of solid cadmium hydr

Serga [27]

Explanation:

It is known that,

Molar mass of Cd = 112.41 g/mol

Standard concentration of Cd = 0.005 mg/L = $0.005 \times 10^{-3}$ g/L

Hence, we will calculate the molarity as follows.

Molarity = $\frac{0.005 \times 10^{-3}}{112.41} mol/L$

= $4.45 \times 10^{-8}$ M

Equation for the reaction is as follows.

$Cd(OH)_{2} \rightleftharpoons Cd^{2+} + 2OH^{-}$

$K_{sp} = [Cd^{2+}][OH^{-}]^{2}]$

$2 \times 10^{-34} = 4.45 \times 10^{-8} \times [OH^{-}]^{2}$

$[OH^{-}] = 6.7 \times 10^{-4}$ M

Also,

$[H^{+}] = \frac{10^{-14}}{[OH^{-}]}$

= $\frac{10^{-14}}{6.7 \times 10^{-4}}$

= $1.49 \times 10^{-11} M$

Relation between pH and concentration of hydrogen ions is as follows.

pH = $-log [H^{+}]$

= $-log (1.49 \times 10^{-11} M)$

= 10.82

Thus, we can conclude that a minimum pH of 10.82 is necessary to reduce the dissolved cadmium ion concentration to the standard.

4 0

3 years ago

Which term refers to the process by which land is worn away by natural forces or human activity?

umka2103 [35]

Answer:

erosion

Explanation:

erosion is the term that refers to the process by which land is worn away by natural forces or human activity.

4 0

3 years ago

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What is made when a salt is dissolved in water?

sergey [27]

C a solution because salt is a solute

5 0

3 years ago

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