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umka2103 [35]
3 years ago
15

An intravenous saline drip has 9.8 g of sodium chloride per liter of water. by definition, 1 ml = 1 cm3.

Chemistry
1 answer:
ELEN [110]3 years ago
4 0
Missing question: Express the salt concentration in kg/m³.
Answer is: the salt concentration is 9.8 kg/m³.
m(NaCl) = 9.8 g ÷ 1000 g/kg.
m(NaCl) = 0.0098 kg.
V(solution) = 1 L = 1 dm³.
V(solution) = 1 dm³ ÷ 1000 dm³/m³.
V(solution) = 0.001 m³.
d(solution) = m(NaCl) ÷ V(solution).
d(solution) = 0.0098 kg ÷ 0.001 m³.
d(solution) = 9.8 kg/m³.
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Ou have a 5 ml sample of a protein in 0.5 m nacl. you place the protein/salt sample inside dialysis tubing (see fig. 2-14) and p
Oduvanchick [21]

Answer:

Procedure (2)  

Explanation:

Assume the dialyses come to equilibrium in the allotted times.

Procedure (1)

If you are dialyzing 5 mL of sample against 4 L of water, the concentration of NaCl will be decreased by a factor of

\dfrac{5}{4000} = \dfrac{1}{800}

Procedure (2)

For the first dialysis, the factor is

\dfrac{5}{1000} = \dfrac{1}{200}

After a second dialysis, the original concentration of NaCl will be reduced by a factor of  

\dfrac{1}{200} \times \dfrac{1}{200} = \dfrac{1}{40000}

Procedure (2) is more efficient by a factor of  

\dfrac{40000}{800} = \mathbf{50}

4 0
3 years ago
What is the percent of hydrogen by mass in HNO3? (Molar<br> mass of HNO3 = 630 g/mol)
xxMikexx [17]

Answer:

63.01284 g/mol

Explanation:

This compound is also known as Nitric Acid.

Convert grams HNO3 to moles or moles HNO3 to grams

Molecular weight calculation:

1.00794 + 14.0067 + 15.9994*3

Percent composition by element

Element Symbol Atomic Mass # of Atoms Mass Percent

Hydrogen H 1.00794 1 1.600%

Nitrogen N 14.0067 1 22.228%

Oxygen O 15.9994 3 76.172%

6 0
3 years ago
According to the ____________________, when a physical or chemical change occurs, no atoms are created or destroyed.
solong [7]
Law of conservation of mass
7 0
3 years ago
Which of the following statements is true about calorimetry?
balu736 [363]

Answer:

Option C

Explanation:

The heat released by the system is absorbed by the surroundings, then only the heat will be balanced.

The surrounding heat increases and so to balance that heat the system releases heat so that it can cool down because heat is neither created nor destroyed.

This is the first law of thermodynamics.

4 0
3 years ago
Read 2 more answers
How many milliliters of 0. 0850 m naoh are required to titrate 25. 0 ml of 0. 0720 m hbr to the equivalence point?
charle [14.2K]

The volume of 0.0850 M NaOH is required to titrate 25.0 ml of 0.0720 M is 21.176 ml.

<h3>What are normality and molarity?</h3>

Normality is defined as the number of equivalents per litre of the solution

It is given by

Normality = number of equivalents / 1 L of solution

Molarity is defined as the number of moles of solute present in one litre of solution

Molarity = moles of solute / 1 litre of solution

Relationship between molarity and normality

Normality = Molarity × Acidity or Basicity of a salt

Here, the Acidity Of NaOH is 1 and the basicity of HBr is also 1.

Thus, Normality = Molarity

We know, N₁V₁ = N₂V₂

We can also write it as M₁V₁ = M₂V₂

V1 = \frac{M_2V_2}{M_!}

Substitute M₁ = 0.0850 M, M₂ = 0.0720 M, V₂= 25 ml

V1 = 21.176 ml

Hence, The volume of 0. 0850 m NaOH are required to titrate 25. 0 ml of 0. 0720 m is 21.176 ml.

Learn more about Normality and molarity:

brainly.com/question/9754178

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3 0
1 year ago
Read 2 more answers
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