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
VikaD [51]
3 years ago
13

Determine the number of moles in 4.50 g of H2O

Chemistry
1 answer:
Irina18 [472]3 years ago
7 0

0.25 moles of water (H₂O)

Explanation:

To calculate the number of moles of a particular substance we use the following formula:

number of moles = mass / molecular weight

molecular wight of water (H₂O) = number of H atoms × atomic weight of H + number of O atoms × atomic weight of O

molecular wight of water (H₂O) = 2 × 1 + 1 × 16 = 18 g/mol

number of moles of water (H₂O) = 4.5 / 18

number of moles of water (H₂O) = 0.25 moles

Learn more about:

number of moles

brainly.com/question/10165629

brainly.com/question/9081560

#learnwithBrainly

You might be interested in
A Doppler radar _________. *
Mnenie [13.5K]
1.) can detect precipitation as well as the movement of small particles which can be used to approximate wind speed.
5 0
3 years ago
The number of _______ in an atom of an element is the element's atomic number
const2013 [10]
The number of protons in an atom is the atom's atomic number.
In a neutral atom the number of protons is equal to the number of electrons.
There is possibility of losing the electrons, but the number of protons are not loosed, except in nuclear chemistry.
So the number of protons is equal to the atom's atomic number.
5 0
3 years ago
What is produce in all chemical reactions?
bazaltina [42]

Answer: Reactants and Products

Explanation:

The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

6 0
3 years ago
Humans exhale carbon dioxide when they breathe. If the concentration of carbon dioxide in the air that
Verizon [17]

Answer:

4 people

Explanation:

In order to know this, we need to gather the data.

First we have 3.5x10⁴ g of LiOH. This grams are to be last for the whole 9 days mission shuttle.

So, we first need to know how much of CO₂ will be neutralized by this mass. This can be done calculating the moles of LiOH, and then, the moles of CO₂

The molecular weight of LiOH is 23.94 g/mol and for CO₂ is 44 g/mol so:

CO₂ + 2LiOH -------> Li₂CO₃ + H₂O

moles of LiOH = 3.5x10⁴ / 23.94 = 1461.988 moles

We have a mole ratio of 1:2 so the moles of CO₂:

moles CO₂ = 1461.988 / 2 = 730.994 moles

The mass of CO₂ for the 9 days will be:

m CO₂ = 730.994 * 44 = 32163.74 g

Now, let's see how much it has to be used per day:

m CO₂/d = 32163.74 / 9 = 3573.75 g per day

This means that we can only take a few astronauts, and this number is:

n° astronaut = 3573.75 / 8.8x10²

<h2>n° astronaut = 4.06</h2><h2>In other words, only 4 astronaut</h2>
3 0
3 years ago
Explain why insects are considered to be the most diverse organism? Insects can survive in all extreme environments. Insects are
Xelga [282]

I think the answer is teh first choice. Cockroaches  can live through atomic radiation!

8 0
3 years ago
Other questions:
  • Calculate the specific heat (J/g∘C) for a 18.5-g sample of tin that absorbs 183 J when temperature increases from 35.0 ∘C to 78.
    10·2 answers
  • Curd is not kept in copper and brass , why?
    10·1 answer
  • I need help with this problem
    13·1 answer
  • Which of the following configurations would form a bent molecule?
    6·1 answer
  • Question 1 (1 point)
    7·2 answers
  • I would really appreciate help with this
    15·1 answer
  • Ethylene glycol (antifreeze) has a density of 1.11 g/cm3. what is the volume in liters of 3.46 kg of ethylene glycol?
    11·1 answer
  • Explain how subshells are related to electrons, and describe the size of each subshell.
    9·1 answer
  • What is the formula for the stable binary ionic compound formed between Barium and Oxygen?
    12·1 answer
  • In the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water, which of the following is a
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!