Ask question

Ask question

All categories

3 years ago

5

A chemistry student needs 75.0ml of pentane for an experiment. by consulting the crc handbook of chemistry and physics, the stud

ent discovers that the density of pentane is 0.626·gcm−3 . calculate the mass of pentane the student should weigh out.

1 answer:

vagabundo [1.1K]3 years ago

3 0

Mass=density x volume
0.626 x 75
46.95

You might be interested in

What are 3 ways the turtle has adapted to survive?

Andrei [34K]

Adapted to the climate change, pollution

6 0

3 years ago

Correct first answer= Brianliest!PLEASE WOULD REALLY APPRECIATE IF YOU’D HELP ME OUT:’(

sveticcg [70]

Answer:

The answer to your question is: 2 grams of methane

Explanation:

Data

V = 9.15 l

P = 1.77 atm

T = 57° C = 330 °K

Ar mass = 19 g

CH4 mass = ?

Formula

PV = nRT

Process

$n = \frac{PV}{RT}$

$n = \frac{(1.77)(9.15)}{(0.082)(330)}$

$n = \frac{16.26}{27.06}$

n = 0.6

Argon

40 g of Ar -------------------- 1 mol

19 g --------------------- x

x = 0.475 mol of Ar

moles of CH4 = 0.6 - 0.475

= 0.125

Methane

16 g of CH4 --------------- 1mol

x ---------------- 0.125 mol

x = 2 grams

3 0

3 years ago

If you use 19 mL of 0.100 M KMnO4, how many moles have you used? The answer has to be in four decimal places (do not forget the

Scorpion4ik [409]

1)

Volume = 19 / 1000 = 0.019 L

n = M * V

n = 0.100 * 0.019

n = 0.0019 moles
__________________________

2)

M₁ * V₁ = M₂* V₂

5.0 * V₁ = 1.0 * 152

5.0 V₁ = 152

V₁ = 152 / 5.0

V₁ = 30.4 mL
______________________________________

<span>hope this helps!</span>

3 0

3 years ago

Sediment spreads horizontality and it goes from youngest on top to oldest on bottom. When sediment deposits in water, it also sp

Ad libitum [116K]

My answer will be C. Law of Original lateral continuity. :)

7 0

3 years ago

Read 2 more answers

What is gluecose used for

Amanda [17]

Glucose is used by intestinal cells and red blood cells, while the rest reaches the liver, adipose tissue and muscle cells, where it is absorbed and stored as glycogen.

(it is saved to be used later)

4 0

3 years ago