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ioda
3 years ago
11

Please help me with this question the image is attached

Chemistry
1 answer:
artcher [175]3 years ago
3 0

Answer:thats confusing

Explanation:

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What is the mass in grams of a single atom of Pt?
Triss [41]

Answer:

3.23945533x10^{-22}g

Explanation:

mass of 1 atom Pt = mass of a mole of atom Pt / 6.022 x 10^{23} = 195.08/6.022 x 10^{23}  = 3.23945533x10^{-22}g

7 0
3 years ago
Calculate the empirical formula of a compound that is 42.9% Carbon and 57.1% Oxygen.
Marrrta [24]

Answer:

CO.

Explanation:

Assuming the given percentages are by mass, we can solve this problem via imagining we have <em>100 g of the compound</em>, if that were the case we would have:

  • 42.9 g of C
  • 57.1 g of O

Now we <u>convert those masses into moles</u>, using the<em> elements' respective molar masses</em>:

  • 42.9 g of C ÷ 12 g/mol =  3.57 mol C
  • 57.1 g of O ÷ 16 g/mol =  3.58 mol O

As the number of C moles and O moles is roughly the same, the empirical formula for the compound is <em>CO</em>.

4 0
3 years ago
Which of the following is a physical change?
Lina20 [59]
C. Rust forming on an iron fence
3 0
3 years ago
Give formula for iron (III) oxide​
Paraphin [41]

Answer:

Fe2O3

Explanation:

6 0
3 years ago
Read 2 more answers
Choose the statements below that are correct regarding the nature of protons and neutrons. Choose ALL statements that are correc
V125BC [204]

Answer:

c. protons and neutrons are found in the nucleus

d. protons and neutrons have approximately the same mass

Explanation:

There are three fundamental particles within an atom which are the protons, neutrons and electrons.

The protons are the positively charged particles within an atom

Neutrons do not carry any charges

Electrons are the negatively charged particles.

  • Both the protons and neutrons occupy the tiny nucleus at the center of the atom.
  • The electrons moves round the nucleus through the orbital space.
  • The mass of the protons and neutrons are similar and are assumed to be approximately the same.
5 0
3 years ago
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