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
Alex_Xolod [135]
3 years ago
8

How many grams are in 4.23E44 particles of PbO2

Chemistry
1 answer:
ASHA 777 [7]3 years ago
3 0

1.679 × 10²³ g of PbO₂ is present in 4.23×10⁴⁴ particles of PbO₂.

<u>Explanation:</u>

First the number of particles is converted into moles by dividing it by the Avogadro's number and then moles multiplied by the molar mass, we will get the mass of PbO₂ in grams.

4.23×10⁴⁴/ 6.022×10²³ = 7.02×10²⁰ moles

Now we have to multiply this by the molar mass of PbO₂, that is 239.2 g/mol, we will get the mass in grams.

7.02×10²⁰ moles × 239.2 g/mol = 1.679 × 10²³ g of PbO₂

You might be interested in
A student sees a commercial that claims a new dishwasher is energy efficient. Compared to less efficient dishwashers, this means
zaharov [31]
It’s either a or b but I’m not sure
4 0
2 years ago
Pls answer quickkk :)))
postnew [5]

Answer:

c turns back when iodine is added result indicated a chemical reaction

4 0
3 years ago
What charge does nitrogen have
professor190 [17]

Answer:

3-

Explanation:

5 0
2 years ago
When heating a flammable or volatile solvent for a recrystallization, which of these statements are correct? More than one answe
Citrus2011 [14]

Answer:

You should not use an open flame to heat the solvent and the solvent should be heat in a stoppered flask to vapour away from the open flame

Explanation:

6 0
3 years ago
Read 2 more answers
Caffeine, a stimulant found in coffee and soda, hasthe mass percent composition: C. 49.48%, H, 5.19%. N. 28.85% 0. 16.48% The mo
borishaifa [10]

We have the next % composition:

C. 49.48%

H, 5.19%.

N. 28.85%

0. 16.48%

We assume 100 g of sample

1) As we have 100 g of sample of Caffeine, we calculate the mass of each element involved here.

C. 49.48 g

H, 5.19 g

N. 28.85 g

0. 16.48 g

2) We calculate the number of moles of each element (we need the mass per mole of each element)

For C) 12.01 g/mol

49.48 g x (1 mol/12.01 g) = 4.120 moles

For H) 1.007 g/mol

5.19 g x (1 mol/1.007 g) = 5.154 moles

For O) 15.99 g/mol

16.48 g x (1 mol/15.99 g) = 1.030 moles

For N) 14.00 g/mol

28.85 g x (1 mol/14.00 g) = 2.060 moles

3) We choose the smallest number from 2) and divide the rest of them by it.

For C) 4.120 moles/1.030 moles= 4

For H) 5.154 moles/1.030 moles= 5

For O) 1.030 moles/1.030 moles= 1

For N) 2.060 moles/1.030 moles= 2

4) The numbers in 3) represents the subindex from the empirical formula of caffeine:

C_4H_5O_1N_2

5) We calculate the molar mass of our empirical formula, 97.06 g/mol.

We already have the molar mass of the molecular formula, so we proceed like this:

n= the molar mass of the molecular formula/the molar mass of the empirical formula

n = 194.19 g/mol/97.06 g/mol = 2 approx.

We use "n" and we multiply our empirical formula by n = 2:

Therefore, our molecular formula:

C_8H_{10}O_2N_4

8 0
1 year ago
Other questions:
  • What is an empirical formula for a compound that is 82.2% nitrogen and 17.8% hydrogen
    13·1 answer
  • Two lab assistants measured a metal rod. One reported the measurement as 250 cm, and the other measured it as 250. cm. These mea
    9·1 answer
  • A solution containing a nonvolatile solute will have
    15·1 answer
  • _____ Contains hydrolytic enzymes associated with the intracellular digestion of macromolecules
    6·1 answer
  • At the end of an experiment, the product is a mixture of the starting material, which is benzoic acid and the product, which is
    11·1 answer
  • What is the definition of a covelant bond?
    7·1 answer
  • Tissues are grouped together to form varius what?
    8·1 answer
  • HELP ASAP!! if given the following balanced equation, circle one of the following calculations that shows how to correctly deter
    12·1 answer
  • Can someone please explain Hydrogen bonding to me?
    7·1 answer
  • 11) If you have a density of 100 kg/L,, tell me the following:
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!