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nikitadnepr [17]
2 years ago
11

A children's liquid cold medicine has a specific gravity of 1.23. If a child is to take 1.5 tsp in a dose, what is the mass (in

grams) of the cold medicine?
Chemistry
2 answers:
oksano4ka [1.4K]2 years ago
4 0

1 tsp contains medicine = 5 mL  

So,1.5 tsp contains medicine = 1.5 tsp x 5ml  

                                              = 7.5 ml  

Specific gravity = 1.23 g ml⁻¹  

Mass of the cold medicine= 7.5 × 1.23  g

                                             = 9.2 g

So, mass of the cold medicine was found to be 9.2 g.

So, a children's liquid cold medicine that has a specific gravity of 1.23. If a child take 1.5 tsp in a dose, the mass (in grams) of the cold medicine was found to be 9.2 g .

julia-pushkina [17]2 years ago
3 0

Assume 1 tsp is approximately can hold 5 mL liquid.

Given the dose of medicine = 1.5 tsp

Converting 1.5 tsp to mL:

1.5 tsp * \frac{5 mL}{1 tsp} = 7.5 mL

Given the specific gravity of the medicine = 1.23

That means density of the medicine with respect to water will be 1.23

As the density of water is 1 g/mL

We can take density of the medicine to be 1.23 g/mL

Calculating the mass of medicine in grams:

7.5 mL * \frac{1.23 g}{mL} =9.225 g

9.225 g medicine is present in one dose.

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A 800N mountain climber scales a 160m cliff. How much work is done by the mountain climber?
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Work done, W = 128 kJ

Explanation:

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4 0
3 years ago
A volume of 25.36 ± 0.05 mL 25.36±0.05 mL of HNO 3 HNO3 solution was required for complete reaction with 0.8311 ± 0.0007 g 0.831
Sholpan [36]

Answer:

MOLARITY= 0.3092mol/l

ABSOLUTE UNCERTAINTY= 0.000873

Explanation:

The equation of reaction is

2HNO3 + Na2CO3 ⟶ 2NaNO3 + H2O + CO2.

QUESTION1: CALCULATION FOR MOLARITY;

Molarity= gram mole of solute ÷ liters of solution

Where;

Mole of solute= mass ÷ molar mass

Therefore;

Mole of solute= 0.8311g ÷ 105.988g/mol= 0.0078515mol

MOLARITY= 0.0078415mol ÷ 25.36ml = 0.0003092mol/ml = 0.3092mol/l

This is the Molarity of the solution

QUESTION2: CALCULATION FOR ABSOLUTE UNCERTAINTY;

Uncertainty (u) =√([0.05 ÷ 25.36]^2 + [0.001 ÷ 105.988]^2 + [0.0007 ÷ 0.8311]^2) × Molarity

Solving brackets gives

(0.00197161+0.00000943503+0.00084226) ×Molarity

Adding up gives

0.002823×Molarity

Therefore;

ABSOLUTE UNCERTAINTY= 0.002823×0.3092= 0.000873

5 0
3 years ago
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