2 years ago

What is 25 °C in °F?

Chemistry

1 answer:

kifflom [539]2 years ago

7 0

Answer:

77°F

Explanation:

(25°C × 9/5) + 32 = 77°F

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What is a negatively charged subatomic particle?

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I think its electrons

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3 years ago

The Sun radiates energy through space and to the Earth's surface. Most of this energy is in the _______ part of the light spectr

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Ultra violet light
The sun radiates UV waves to the earth and the earths atmosphere absorbs most of them.

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2 years ago

Which of the following statements is true about what happens during a chemical reaction?

tiny-mole [99]

Answer: The correct option is A.

Explanation: In a chemical reaction, reactants react to form a number of products.

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For example: Formation of water from hydrogen gas and oxygen gas. Reaction follows:

$2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$

The Bonds of hydrogen and oxygen molecule are broken and new bonds between hydrogen and oxygen atoms are formed to give water molecule.

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2 years ago

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The OH- ion concentration is greater than the H3o+ ion concentration in a water solution of

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Answer:

B) CH₃OH

Explanation:

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3 years ago

Radium has a half-life of 1,620 years. In how many years will a 1 kg sample of radium decay and reduce to 0.125 kg of radium?

Tasya [4]

We can calculate years by using the half-life equation. It is expressed as:

A = Ao e^-kt

where A is the amount left at t years, Ao is the initial concentration, and k is a constant.

From the half-life data, we can calculate for k.

1/2(Ao) = Ao e^-k(1620)
k = 4.28 x 10^-4

0.125 = 1 e^-4.28 x 10^-4 (t)
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2 years ago

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