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3 years ago

Record the volume of solution that will be delivered from the pipet pictures below in units of mL

Chemistry

1 answer:

zloy xaker [14]3 years ago

7 0

Answer:

2a. 3mL.

2b. 10mL.

3. 38°C.

Explanation:

2a. We read the volume under the meniscus i.e under the curve.

The volume of the solution is 3mL.

2b. The volume of the pipette 10mL and the solution is at the calibration mark. Therefore, the volume of the solution is 10mL.

3. From the diagram given, we can see that 1 line represents 1 unit.

Now a careful look at the picture shows that the temperature is 38°C.

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3 years ago

The chemical formula of ordinary sugar is C12H22O11. Calculate the mass of 7.35 mol of sugar.

ch4aika [34]

First, you need to find the mass of 1 mol of sugar. Mass, or molar mass, can simply be found by adding the masses of the individual elements. These are given to you on the periodic table.

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3 years ago

A 75.0-liter canister contains 15.82 moles of argon at a pressure of 546.8 kilopascals. What is the temperature of the canister?

alexandr1967 [171]

Answer:

312 K

Explanation:

1) Data:

a) V = 75.0 liter

b) n = 15.82 mol

c) p = 546.8 kPa

d) T = ?

2) Formula:

Ideal gas equation: pV = nRT

Where:

n = number of moles
V = volume
p = absolute pressure
T = absolute temperature
R = Universal Gas constat: 8.314 kPa - liter / K-mol

3) Solution:

a) Solve the equation for T:

T = pV / (nR)

b) Substitute and compute:

T = 546.8 kPa × 75.0 l iter / (15.82 mol × 8.314 kPa-liter/K-mol) = 312 K

(since the volume is expressed with 3 significant figures, the answer must show also 3 significant figures)

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4 years ago

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4 years ago

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