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3 years ago

The role of teeth in the digestive system?

Chemistry

2 answers:

GREYUIT [131]3 years ago

5 0

We use our teeth to chew our food and prepare food to travel through the rest of digestive system

USPshnik [31]3 years ago

4 0

Help saliva and makes food soft and easy to swallow

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How many total moles of ions are released when the following sample dissolves completely in water? Enter your answer in scientif

levacccp [35]

Answer:

Total moles of ions are released in water are $1.131\times 10^{-5} mol$ .

Explanation:

Mass of calcium nitrate = $6.18\times 10^{-4} g$

Molar mass of calcium nitrate = 164 g/mol

Moles of calcium nitrate = $\frac{6.18\times 10^{-4} g}{164 g/mol}=3.77\times 10^{-6} mol$

$Ca(NO_3)_2(aq)\rightarrow Ca^{2+}(aq)+2NO_3^{-}(aq)$

According to reaction, 1 mole of calcium nitrate gives 1 mole of calcium ions, then $3.77\times 10^{-6}$ moles of calcium nitrate will give:

$1\times 3.77\times 10^{-6} mol=3.77\times 10^{-6} mol$ of calcium ions

According to reaction, 1 mole of calcium nitrate gives 2 mole of nitrate ions, then $3.77\times 10^{-6}$ moles of calcium nitrate will give:

$2\times 3.77\times 10^{-6} mol=7.54\times 10^{-6} mol$ of nitrate ions

Total moles of ions are released :

$3.77\times 10^{-6} mol+7.54\times 10^{-6} mol=11.31\times 10^{-6} mol\approx 1.131\times 10^{-5} mol$

6 0

3 years ago

What is the charge for the compound Cr(OH)3

devlian [24]

The answer is an answer

8 0

3 years ago

Which bond is formed due to a high electronegativity difference?

ira [324]

Answer:
Ionic bond

Explanation:
When the electronegativity between the two atoms is very large (usually greater than 2.1), this can lead to total transfer of electron from the higher electronegative atom to the lower one.
The total transfer of electrons leads to the formation of ionic bond.

8 0

3 years ago

Your friend Niko predicts that iron and silver nitrate will form when silver is placed into an iron (III) nitrate solution. Is t

SCORPION-xisa [38]

Answer:

It is correct because iron is more reactive than silver.

Explanation:

3 0

3 years ago

How much more sodium, in grams, is in a 3M solution than 2M soultion?

ipn [44]

<h3>Answer:</h3>

23 grams Na

<h3>Explanation:</h3>

Molarity is the concentration of a solution in moles per liter.
Therefore, a solution with a molarity of 3M contains 3 moles of solute in 1 liter of solution, while a solution with 2M contains 2 moles of solute in 1 liter of solution.

Thus, 3 M = 3 moles/liter

2 M = 2 moles /liter

The difference is 1 mole/Liter

But, 1 mole of sodium 23 g

Therefore;

Mass of sodium = moles × Atomic mass

= 1 mole × 23 g/mol

= 23 g

Therefore a 3 M solution contains 23 g of sodium more than a 2 M solution.

7 0

3 years ago