Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as 1.5 × 10−5 mol. What is the concentration of Ca2+ ions in the water sample in ppm CaCO3?

Answers

Answer 1

Answer: $(1.5x 10^(-5) mol Ca^(2+))/(50ml) ( (1 mol CaC O_(3) )/(1 mol Ca^(2+) ) )( (100,000 ppm)/(1 molCaC O_(3)/L ) ) \n =0.0300234$

Answer 2

Answer:

Answer : The concentration of $Ca^(2+)$ ions in the water sample in ppm is, 12000 ppm

Solution : Given,

Moles of calcium = $1.5* 10^(-5)moles$

Molar mass of calcium = 40 g/mole

Volume of solution = 50 ml

First we have to calculate the mass of calcium.

$\text{Mass of calcium}=\text{Moles of calcium}* \text{Molar mass of calcium}=(1.5* 10^(-5)moles)* (40g/mole)=60* 10^(-5)g=6000mg$

(1 g = 1000 mg)

Now we have to calculate the concentration of calcium.

$\text{Concentration of calcium}=\frac{\text{Mass of calcium}* 1000}{\text{Volume of solution}}=(6000mg* 1000)/(50ml)=12000mg/L=12000ppm$

(1 ppm = 1 mg/L)

Therefore, the concentration of $Ca^(2+)$ ions in the water sample in ppm is, 12000 ppm

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Answers

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Answers

The structural formula of 1, 1 dibromo propane is C₃H₆Br₂.

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It is used in organic synthesis of compounds.

Thus, the structural formula of 1, 1 dibromo propane is C₃H₆Br₂.

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CHBr2-CH2-CH3 Both bromide groups on the same carbon

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Answers

Since height is a basic physical property of length, the height of a classroom ceiling is expressed in meters, or meters, or meters.

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There are some physical characteristics of matter, such as length, mass, volume, weight, and so forth, that are dependent on the amount or size of the substance.

As the size or amount of the matter changes, so do these qualities of matter and their values.

A quality of matter that is unrelated to a change in its chemical makeup is called a physical property.

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Therefore, meter is used to express the height of your classroom ceiling.

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Feet would be the best unit to use. Yards would work as well though.
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Answers

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Say you had another object of the exact same material as the previous question. You need to know the volume but the object is irregularly shaped and is much too large for graduated cylinder. However, you know that the mass is 382 g. What is the volume of the object?