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attashe74 [19]
3 years ago
11

Help! please

Chemistry
1 answer:
borishaifa [10]3 years ago
3 0

Answer:

The correct answers are : A neutron has no charge; Neutrons travel around the nucleus of an atom.

Explanation:

The neutrons correspond to subatomic particles present in the nucleus of the atoms, together with the protons. Neutrons do not have an electric charge and have similar mass to protons. The difference in neutrons between atoms of the same element is called an isotope (they differ in mass numbers from one another, for example Hydrogen and Deuterium).

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What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen?
rusak2 [61]

Answer:

The empirical formula is C3H3O

Explanation:

Step 1: Data given

Suppose the mass of the molecule = 100 grams

The molecule contains:

65.5 % Carbon = 65.5 grams

5.5 % Hydrogen = 5.5 grams

29.0% Oxygen = 29.0 grams

Molar mass of C = 12 g/mol

Molar mass of H = 1.01 g/mol

Molar mass of O = 16 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles C = 65.5 grams / 12 g/mol = 5.46 moles

Moles H = 5.5 / 1.01 g/mol = 5.45 moles

Moles O = 29.0 grams / 16 g/mol = 1.8125 moles

Step 3: Calculate mol ratio

We divide by the smallest amount of moles

C: 5.46 / 1.8125 = 3

H = 5.45 / 1.8125 = 3

O = 1.8125/1.8125 = 1

The empirical formula is C3H3O

8 0
3 years ago
Calcium electron configuration
otez555 [7]

Answer:

1s2 2s2 2p6 3s2 3p6 4s2

shorthand: [Ar] 4s2

Explanation:

the end number values are exponents, so 1s^2

3 0
3 years ago
A substance which is made up of identical atoms is a(n):
Troyanec [42]

Answer:

A chemical compound

So probably A

4 0
3 years ago
Read 2 more answers
Give the name and formula for the acid derived from each of the following anions: (a) perchlorate (b) N03- (c) bromite (d) H2PO4
Vlada [557]

Answer:

(a) Perchloric acid (HClO₄)

(b) Nitric acid (HNO₃)

(c) Bromous acid (HBrO₂)

(d) Phosphoric Acid (H₃PO₄)

Explanation:

Acids are the species which furnish hydrogen ions in the solution. The other specie produced with the hydrogen ion is called its conjugate base.

Thus,

(a) Perchlorate (ClO₄⁻) ion:

The acid that furnish perchlorate ion is <u>perchloric acid (HClO₄)</u>.

(b)  NO₃⁻ ion:

The acid that furnish NO₃⁻ ions is <u>Nitric acid (HNO₃)</u>.

(c) bromite (BrO₂⁻) ion:

The acid that furnish BrO₂⁻ ions is <u>Bromous acid (HBrO₂)</u>.

(d)  H₂PO₄⁻ ion:

The acid that furnish H₂PO₄⁻ ions is <u>Phosphoric Acid (H₃PO₄)</u>.

6 0
3 years ago
What is the volume occupied by 35.4 grams of nitrogen gas at 35 degrees celsius and 735 torr?
Umnica [9.8K]
735 torr = 1 atmosphere(atm)
Temperature in Kelvin = 273 + 35 = 308 K

Moles of Nitrogen gas = mass of N2 / molar mass of N2
                                       =  35.4/28.014
                                       =  1.26 moles

Using Ideal gas equation,

PV = nRT
1 x V = 1.26 x 0.082 x 308

V = 31.822 liters.

Hope this helps!
7 0
4 years ago
Read 2 more answers
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