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3 years ago

The hydrogen ion concentration of a vinegar solution is 0.00010 m. how is this concentration written in scientific notation?

Chemistry

2 answers:

mote1985 [20]3 years ago

8 0

0.00010 written in scientific notation is 1.0 * 10^-4.

Scientific notation refer to the standard manner of writing numbers that are too small or that are too big in such a way that it will be convenient to involve them in calculations and also easier to compare them. Another name for scientific notation is standard form. The format of scientific notation is Z * 10^a, where Z can be any number between 1 and 9 and a is an integer, which can be positive or negative. For the number given in the question, the number of zeros at the back of 1 is counted [there are four zeros] and this number is written as an index of 10. A negative sign is added to the number because of the decimal point in the figure.

9966 [12]3 years ago

3 0

We are given with a vinegar with a hydrogen ion concentration of 0.00010 m. We are asked to express this concentration in scientific notation. The answer when expressed in scientific notation is 1x10^-4 m or molality. Answer is 1x10^-4 m.

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Answer:

Excess Reagent = oxygen

Explanation:

Limiting reagent: The substance that is totally consumed when the reaction is completed.

Excess reagent: The substance left after the limiting reagent is consumed completely

The balanced chemical equation for formation of water is as follow:

$2H_{2}+O_{2}\rightarrow 2H_{2}O$

This means when 2 moles of hydrogen reacts with 1 mole of oxygen, 2 moles of water is produced.

Hence the ratio in which hydrogen and oxygen gas reacts is 2:1

Now if 2 mole hydrogen require 1 mole of oxygen ,then 4 mole hydrogen need 2 mole of oxygen.

$H_{2}:O_{2}=2:1$

$H_{2}:O_{2}=4:2$

Here 5 mole of oxygen is reacting but only 2 mole is required .

Oxygen is in excess.

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Answer:

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Explanation:

A chemist makes 660. mL of magnesium fluoride working solution by adding distilled water to 230. mL of a 0.00154 mol/L stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

Step 1: Given data

Initial concentration (C₁): 0.00154 mol/L

Initial volume (V₁): 230. mL

Final concentration (C₂): ?

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