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3 years ago

Sodium bicarbonate is the chemical name for baking soda. Its chemical formula is NaHCO3. What does the subscript 3 mean?

Chemistry

2 answers:

iris [78.8K]3 years ago

8 0

Answer:

'3' in NaHCO₃ is the number of moles oxygen in 1 mole of sodium bicarbonate

Explanation:

see above note.

Oksi-84 [34.3K]3 years ago

3 0

There Are Three Atoms Of Oxygen In Sodium Bicarbonate.

_______

I Got It Right On The Test, Hope It Helps :)

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What is the molar mass of K₂CO₃?

storchak [24]

Answer:

138g/mol

Explanation:

K₂CO₃ is also known as potassium carbonate. It has a molar mass of around 138.21 g/mol (138.2055 g/mol to be exact).

4 0

2 years ago

A biologist has two brine solutions, one containing 4% salt and another containing 16% salt. How many milliliters of each soluti

agasfer [191]

Answer:

400 mL of 4% salt solution and 600 mL of 16% salt solution need to be mixed

Explanation:

Let's assume concentration of brine salt solutions are in %(w/v) unit.

Final mixture has a concentration of 11.2% salt and volume of 1 L or 1000 mL

Hence, amount of salt in final mixture = $\frac{11.2\times 1000}{100}g=112g$

Suppose x mL of 4% salt solution and (1000-x) mL of 16% salt solution need to be mixed to get final mixture

So, amount of salt in x mL of 4% salt solution = $\frac{4x}{100}g$

amount of salt in x mL of 16% salt solution = $\frac{16\times (1000-x)}{100}g$

Hence, $\frac{4x}{100}+\frac{16\times (1000-x)}{100}=112$

or, $x=400$

So, 400 mL of 4% salt solution and 600 mL of 16% salt solution need to be mixed

3 0

4 years ago

Cindy left a small glass of salt water outside on her windowsill on a warm day. She remembered the glass a couple days later, bu

Elan Coil [88]

When the glass of salt water was outside, the water evaporated leaving behind the minerals, in this case, salt.

6 0

3 years ago

Read 2 more answers

Sulfur hexafluoride, a dense gas, is held in two separate containers in a storage room at an atmospheric pressure of 755 mmHg an

dimaraw [331]

Explanation:

As it is given that both the given containers are at same temperature and pressure, therefore they have the same density.

So, mass of $SF_{6}$ in container- 1 is as follows.

5.35 mol x molar mass of $SF_{6}$

= 7.61 mol x 146.06 g/mol

= 1111.52 g

Therefore, density of $SF_{6}$ will be calculated as follows.

Density = $\frac{mass}{volume}$

density = $\frac{1111.52 g}{2.09 L \times 1000 ml/L}$

= 0.532 g/mL

Now, mass of $SF_{6}$ in container- 2 is calculated as follows.

4.46 L x 1000 mL/L x 0.532 g/mL

= 2372.72 g

Hence, calculate the moles of moles $SF_{6}$ present in container 2 as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $\frac{2372.72 g}{146.06 g/mol}$

= 16.24 mol

Since, 1 mol $SF_{6}$ contains 6 moles F atoms .

So, 16.24 mol $SF_{6}$ contains following number of atoms.

= $16.24 mol \times 6$

= 97.46 mol

Thus, we can conclude that moles of F atoms in container 2 are 97.46 mol.

7 0

3 years ago

Convert 338 L at 63.0 atm to its new volume at standard pressure.

taurus [48]

The new volume at standard pressure of 1 atm is 21294 liters.

Explanation:

Data given:

Initial volume of the gas V1 = 338 liters

initial pressure on the gas P1 = 63 atm

standard pressure as P2 = 1 atm

Final volume at standard pressure V2 =?

The data given shows that Boyle's law equation is to used:

P1V1 = P2V2

rearranging the equation to calculate V2,

V2 = $\frac{P1V1}{P2}$

Putting the values in the equation:

V2 = $\frac{338X63}{1}$

= 21294 L

as the pressure on the gas is reduced to 1 atm the volume of the gas increased incredibly to 21294 litres.

7 0

3 years ago