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Allisa [31]
3 years ago
7

How many grams of sodium chloride are dissolved in 375 ml of a 0.90% saline solution?

Chemistry
1 answer:
liq [111]3 years ago
3 0

Answer:

337.5 g NaCl

Explanation:

.90% saline solution = 90g saline (NaCl)/100mL water (H2O)

1. Use 375 mL to find mass

375 mL × (90 g NaCl/100 mL) = 337.5 g NaCl in 375 mL .9% saline solution

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1. Find the molarity of 25g of sodium hydroxide dissolved in 1L of water. Identify the solute and solvent in this solution.
wolverine [178]

Answer:

.6250 M

The Sodium Hydroxide is the solute, and the water is the solvent.

Explanation:

mol/volume= Molarity

(25/22.99+16+1.008)/1=.6250 M.

6 0
3 years ago
lactic acid, which consists of C, H, and O, has long been thought to be responsible for muscle soreness following strenuous exer
Minchanka [31]

Answer:

C3H6O3

Explanation:

I got you babe

3 0
3 years ago
A sample of helium gas has a pressure of 1.20 atm at 22.0 C. At what Celsius temperature will the helium reach a pressure of 2.0
Anarel [89]

Answer: 36.6°C

Explanation:

Given that,

initial pressure of helium (P1) = 1.20 atm

Initial temperature (T1) = 22.0°C

Final temperature (T2) = ?

Final pressure of helium (P2) = 2.00 atm

Since pressure and temperature are given while volume is constant, apply the formula for pressure's law

P1/T1= P2/T2

1.20 atm / 22.0°C = 2.00 atm / T2

Cross multiply

1.20 atm•T2= 2.00 atm•22°C

1.20 atm•T2= 44 atm•°C

Divide both sides by 1.20 atm

1.20 atm•T2/1.20 atm = 44 atm•°C/1.20 atm

T2 = 36.6°C

8 0
4 years ago
Calculate the number of atoms in 4g of bromine molecule.(Br).
KIM [24]

Answer:

\\ N=n * N_{A}

We do not have n - the amount of substance.

n=\frac{m}{M}\\

The molecular weight (M) of Bromine is 80.

n=\frac{4}{80} = 0.05 \text{ mol}

N = 0.05 * 6.02 * 10^{23} = 0.301 * 10^{23}

3 0
3 years ago
What is the oxidation number for Al in Al₂O₃?
sesenic [268]
Oxygen in oxides has oxidation number -2.

<span>Al⁺³₂O⁻²₃

+3*2 -2*3=0</span>
4 0
4 years ago
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