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3 years ago

Question 13 (1 point)

Chemistry

2 answers:

mr Goodwill [35]3 years ago

7 0

Answer 1) : Option A) Compound

Explanation : When a substance is made up of two or more atoms which are from different elements then they are called as compound. which are chemically inseparable. But if the atoms are combining with the atoms of the same element then it is called as element.

Answer 2) : Option A) Compound

Explanation : The compound is formed when atoms from different elements and get combined to form a new substance. It cannot be easily physically separated. It can be chemically separated. A molecule is formed when two or more atoms join together chemically. A compound at least two different elements.

arsen [322]3 years ago

4 0

<span>Water is formed when two hydrogen atoms bond to an oxygen atom.
When a substance is made of two or more atoms like this, we call it AN ELEMENT

</span><span>Water is formed when two hydrogen atoms bond to an oxygen atom.
When a substance is made of two or more atoms like this, we call it A COMPOUND</span>

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How many molecules are in 83.2 g of chlorine gas (Cl2)?

Alisiya [41]

Answer:

1. 1.8 mol or the 2 one (B)

Explanation:

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3 years ago

Answer these questions based on 234. 04360 as the atomic mass of thorium-234. The masses for the subatomic particles are given.

nikdorinn [45]

The mass defect for the isotope thorium-234 if given mass is 234.04360 amu is 1.85864 amu.

<h3>How do we calculate atomic mass?</h3>

Atomic mass (A) of any atom will be calculated as:

A = mass of protons + mass of neutrons

In the Thorium-234:

Number of protons = 90

Number of neutrons = 144

Mass of one proton = 1.00728 amu

Mass of one neutron = 1.00866 amu

Mass of thorium-234 = 90(1.00728) + 144(1.00866)

Mass of thorium-234 = 90.6552 + 145.24704 = 235.90224 amu

Given mass of thorium-234 = 234.04360 amu

Mass defect = 235.90224 - 234.04360 = 1.85864 amu

Hence required value is 1.85864 amu.

To know more about Atomic mass (A), visit the below link:

brainly.com/question/801533

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2 years ago

Conceptos de agentes químicos

iogann1982 [59]

If you need to translate, the answer is
Chemical agents concept

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3 years ago

n the periodic table, the atomic mass of oxygen is listed as 15.9994 amu. Based on this, one can deduce that the most common ___

Anit [1.1K]

Isotope- variation of an element

Sixteen- atomic number of oxygen

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3 years ago

Read 2 more answers

Hypochlorous acid decays in the presence of ultraviolet radiation. Assume that degradation occurs accord- ing to first-order kin

Dennis_Churaev [7]

Answer:

35.75 days

Explanation:

From the given information:

For first-order kinetics, the rate law can be expressed as:

$\mathsf{In \dfrac{C}{C_o} = -kt}$

Given that:

the rate degradation constant = 0.12 / day

current concentration C = 0.05 mg/L

initial concentration C₀ = 3.65 mg/L

$\mathsf{In( \dfrac{0.05}{3.65})= -(0.12) t}$

㏑(0.01369863014) = -(0.12) t

-4.29 = -(0.12)

t = -4.29/-0.12

t = 35.75 days

3 0

3 years ago