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ValentinkaMS [17]
3 years ago
14

Can anyone help me with any of the questions

Chemistry
1 answer:
Dafna11 [192]3 years ago
7 0
Use the chart to help you look carefully at the numbers and the volumes to figure the questions out hope this helps
You might be interested in
A latex balloon at sea level and room temperature (25°C) has a volume of 2.42 L. When the balloon is released by the child holdi
yarga [219]

Answer:

The answer to your question is: V2 = 1.94 l

Explanation:

Data

V1 = 2.42 l

T1 = 25°C

P1 = 1 atm

V2 = ?

T2 = 25 -11 = 14°C

P2 = 1(0.7) = 0.7 atm

Formula

P1V1/T1 = P2V2/T2

Clear V2 from the equation

V2 = P1V1T2/ P2T1

V2 = (1)((2.42)(14) / (0.7)(25)

V2 = 33.88 / 17.5

V2 = 1.94 l

6 0
3 years ago
A sucrose solution is prepared to a final concentration of 0.250 M . Convert this value into terms of g/L, molality, and mass %.
MArishka [77]

Answer:

A. 85.6 g

= 0.0856 kg.

B. 0.00027 mol/g

= 0.27 mol/kg.

C. 8.39 %

Explanation:

Given:

Molar concentration = 0.25 M

Molar weight of sucrose = 342.296 g/mol

Density of solution = 1.02 g/mL

Mass of water = 934.4 g.

Density in g/l = 1.020 g/ml * 1000ml/1 l

= 1020 g/l

Mass of solution in 1 l of solution = 1020 g

Mass of solution = mass of solvent + mass of solute

Mass of sucrose = 1020 - 934.4

= 85.6 g of sucrose in 1 l of solution.

A.

Density of sucrose = mass/volume

= molar mass/molar concentration

= 342.296 * 0.25

= 85.6 g/l

Number of moles = mass/molar mass

= 85.6/342.296

= 0.25 mol

B.

Molality = number of moles of solute/mass of solvent

= 0.25/934.4

= 0.00027 mol/g

C.

% mass of sucrose = mass of sucrose/total mass of solution * 100

= 85.6/1020 * 100

= 8.39 %

6 0
3 years ago
Nitrogen has the atomic number 7. an isotope of nitrogen containing seven neutrons would be
BigorU [14]
An isotope of nitrogen containing 7 neutrons would be nitrogen-7
8 0
4 years ago
What do scientists fear the effect of continued logging will be on the rain forests??
shutvik [7]
What do you think will happen if trees are cut down? What do you think will happen to the surrounding area on the rainforests? What are found in rainforests?
5 0
3 years ago
Which of the following is one way to prevent the corrosion of iron? 
Drupady [299]
B: Painting over a metal surface in order to prevent rust is known as rust proofing and it works by preventing oxygen and water from reaching the metal surface thus preventing a redox reaction which would result in rusting.
4 0
3 years ago
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