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3 years ago

_____ is the measurement of the density of a substance as compared to water.

Chemistry

1 answer:

alexgriva [62]3 years ago

8 0

Answer: Specific gravity

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Calcium nitrate tetrahydrate dissolves in cold water to the extent of 266 g per 100 cm3. What is the concentration of nitrate io

Soloha48 [4]

Answer : The correct option is, (b) 22.5 M

Explanation : Given,

Mass of calcium nitrate tetrahydrate = 266 g

Molar mass of calcium nitrate tetrahydrate = 236.15 g/mole

Volume of solution = $100cm^3=100mL$

Molarity : It is defined as the moles of solute present in one liter of solution.

Formula used :

$Molarity=\frac{\text{Mass of calcium nitrate tetrahydrate }\times 1000}{\text{Molar mass of calcium nitrate tetrahydrate }\times \text{volume of solution in ml}}$

Now put all the given values in this formula, we get:

$Molarity=\frac{266g\times 1000}{236.15g/mole\times 100ml}=11.26mole/L=11.26M$

As calcium nitrate tetrahydrate dissociate to give 1 mole of calcium ion, 2 moles of nitrate ion and 4 moles of water.

The concentration of nitrate ion = $2\times 11.26M=22.5M$

Thus, the concentration of nitrate ion is, 22.5 M

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3 years ago

Besides plants, do other organism get their energy directly from the Sun?<br> yes or no

Contact [7]

yes they doExplanation:

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3 years ago

Read 2 more answers

Can someone please help I’ll give brainliest!!!

padilas [110]

Single replacement because only one letter is being switched out in the reaction

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2 years ago

Help please i am very dumb

UkoKoshka [18]

Answer:

1. 25%

2. 1.25

3. 1

Explanation:

Be sure to look at the x and y axis to answer these questions. All you need to do is look at the graph.

- Hope that helps! Please let me know if you need further explanation.

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3 years ago

If I started with 42.00 L of oxygen (O2) gas, how many grams is that?

belka [17]

Answer:

42 liters of oxygen (liquid) weighs 47900 grams.

Explanation:

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3 years ago