1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PtichkaEL [24]
3 years ago
6

Someone pls help with this

Chemistry
1 answer:
Anettt [7]3 years ago
5 0
Question 3 is uniformitarianism
Question 4 is sedimentary rock
You might be interested in
THE LAST QUESTION I NEED, PLEASE HELP! WILL MARK BRAINLIEST IF CORRECT!
maw [93]

Answer: The answer is critical point

Explanation:

Took the quiz and got it right

6 0
3 years ago
(Atomic masses used are C = 12.0 g mol–1, O = 16.0 g mol–1, H = 1.01 g mol–1, Cu = 63.5 g mol–1,)
alex41 [277]

<u>Question 1</u>

The formula mass of methanol is 12.0+3(1.01)+16.0+1.01=32.04 g/mol.

Therefore, in 5.0 grams of methanol, there are 5.0/32.04=\boxed{0.16} moles.

<u />

<u>Question 2</u>

The formula mass of copper(II) carbonate is 63.5+12.0+3(16.0)=123.5 g/mol.

This means that in 9.0 grams of copper(II) carbonate, there are 9.0/123.5=0.072874493927126 moles.

Using Avogradro's number, there are (0.072874493927126)(6.022 \times 10^{23})=\boxed{4.4 \times 10^{22}} molecules.

<u>Question 3</u>

The formula mass of cyclohexane is 12.0(6)+1.01(12)=84.12 g/mol.

So, 3.0 grams of cyclohexane is the same as 3.0/84.12=\boxed{0.036} moles.

<u>Question 4</u>

The formula mass of benzene is 12.0(6)+1.01(6)=78.06 g/mol.

This means that 4.00 moles of benzene has a mass of (78.06)(4.00)=\boxed{312} grams.

<u>Question 5</u>

1000 atoms of calcium is the same as \frac{1.000}{6.022 \times 10^{23}} moles.

This is equal to \frac{1000}{6.022 \times 10^{23}} \cdot 40.078=\boxed{6.7 \times 10^{-20}} grams.

6 0
1 year ago
g If a sample of 50 mL of ethyl benzene (bp = 136 C) was contaminated with 10 mL of ethyl acetate (bp = 77 C) what effect would
PolarNik [594]

Answer:

melting point will be higher than that of pure ethyl acetate

Explanation:

6 0
3 years ago
How an atom of an element reacts chemically is based on its what?
iragen [17]
How an atom reacts chemically depends on how willing it is to share electrons with others.

It’s electrons
8 0
2 years ago
Hi can u help me pls? I'm totally stuck . The natural source of acidity in rain water is _____.
kykrilka [37]

Answer-The correct option is option d with says all of the above.

Explanation- All three acids that are given combined together to form acid rain in which nitric and sulphuric acid are stronger acids present while carbonic acid is a weaker one.

The carbon dioxide admitted in air combines with water to form carbonic acid and gives a weak acidic nature to rainwater. Pollution in nature makes sulphur and nitrogen present in air react to form the stronger acids responsible for acid rain.

5 0
3 years ago
Other questions:
  • A yield of NH3 of approximately 98% can be obtained at 200°C and 1,000 atmospheres of pressure.
    12·1 answer
  • Give the name of the following molecule. EXTRA POINTS PLEASE HELP
    14·1 answer
  • What is the temperature of o3 gas if the average speed(actually the root mean square speed of the molecules is 750 m/s
    13·1 answer
  • Which of these is not an ecosystem service that benefits people?
    11·1 answer
  • What is a pure substance​
    5·1 answer
  • Please answer! will mark brainiest for correct answer!
    11·2 answers
  • A cougar with a mass of 80 kg is standing at the edge of a cliff. Find the cougar’s potential energy if the cliff is 70 m high
    13·2 answers
  • How does the lithosphere affect wildfires
    6·1 answer
  • What is the position of the dog
    11·2 answers
  • What is the best way to learn radicals ?​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!