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kkurt [141]
4 years ago
7

Which glassware would be used to make a 1.0 m kcl solution?

Chemistry
1 answer:
labwork [276]4 years ago
6 0
Molarity of solution is expressed as,
Molarity = \frac{\text{weight of solute(g)}}{\text{Molecular Weight X Vol. of solution (l)}}

Molecular weight of KCl = 74.55 g/mol

For preparing 1 mol of KCl solution (1 liter), 74.44 g KCl must be dissolved in 1 liter of water.

Following glasswares are required for preparing the solution.
1) Watch Glass (for weight the KCl)
2) Beaker (for preparing the solution)
3) Stirrer (For dissolving KCl in water)
4) Standard measuring flask (To ensure final volume of solution is 1 liter)
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A patient is given 200 mg of a drug with the formula: C32H34N6O10. How many mg of the drug is carbon?
Mice21 [21]

200 mg of C₃₂H₃₄N₆O₁₀ contains 116 mg of carbon.

To obtain the answer to the question, we'll begin by calculating the molar mass of C₃₂H₃₄N₆O₁₀. This can be obtained as follow:

Molar mass of C₃₂H₃₄N₆O₁₀ = (12×32) + (1×34) + (14×6) + (16×10)

= 384 + 34 + 84 + 160

<h3>= 662 g/mol </h3>

From the molar mass of C₃₂H₃₄N₆O₁₀, we can see that:

<h3>662 g of C₃₂H₃₄N₆O₁₀ contains 384 g of carbon. </h3>

Converting 662 g of C₃₂H₃₄N₆O₁₀ to mg, we have

1 g = 1000 mg

Therefore,

662 g = 662 × 1000

<h3>662 g of C₃₂H₃₄N₆O₁₀ = 662000 mg</h3>

Converting 384 g of carbon to mg, we have,

1 g = 1000 mg

Therefore,

384 g = 384 × 1000

<h3>384 g of carbon = 384000 mg</h3>

Thus, we can say that:

662000 mg of C₃₂H₃₄N₆O₁₀ contains 384000 mg of carbon.

Finally, we shall determine the mass (in mg) of carbon in 200 mg of C₃₂H₃₄N₆O₁₀. This can be obtained as follow:

662000 mg of C₃₂H₃₄N₆O₁₀ contains 384000 mg of carbon.

Therefore, 200 mg of C₃₂H₃₄N₆O₁₀ will contain = \frac{200 * 384000}{662000} = 116 mg of carbon.

Thus, we can conclude that 200 mg of C₃₂H₃₄N₆O₁₀ contains 116 mg of carbon.

Learn more: brainly.com/question/24572517

8 0
3 years ago
Specific Heat of Water = 4.186
yarga [219]

Answer:

Q = 2260.44 j

Explanation:

Given data:

Mass of ice = 18 g

Initial temperature = -10 °C

Final temperature = 20°C

Heat absorbed by ice  = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = Final temperature - initial temperature

ΔT = 20°C - (-10°C)

ΔT =  30°C

Specific heat of water = 2.00 j/g.°C

Q = 18 g × 4.186 j/g.°C × 30°C

Q = 2260.44 j

4 0
4 years ago
Read 2 more answers
Calculate the enthalpy of combustion, δh∘comb, for c6h14. you'll first need to determine the balanced chemical equation for the
Vedmedyk [2.9K]
<span>Answer: Enthalpy Change = (6 x -393.5) + (7 x -285.8) - (-204.6) + (19/2) 0.....??? like.. (6 x Enth CO2) + ( 7 x Enth H2O) - (Enth C6H14) + (19/2) Enth O2</span>
3 0
4 years ago
Suppose that 7.25 x 10^22 atoms of a hypothetical element have a mass of 3.88 g. What would be the molar mass (g/mol) of this el
S_A_V [24]

Answer:

32.23 to 4 significant figures.

Explanation:

The molar mass of the element is the mass of 6.022 * 10^23 atoms (Avogadro's number).

So by proportion it is 6.022 * 10^23 * 3.88 / 7.25 * 10^22

= 32.23 to 4 significant figures.

4 0
4 years ago
Kareem wants to dissolve rock salt in a glass of water at
Mars2501 [29]
Add hot water into the glass
5 0
3 years ago
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