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3 years ago

The law of blank of mass states that in any physical or chemical change, matter is neither created nor destroyed.

Chemistry

2 answers:

riadik2000 [5.3K]3 years ago

6 0

Answer:

conservation

Explanation:

the law of conservation of mass

Leokris [45]3 years ago

5 0

Answer:

The Law Of Conservation Of Mass

Explanation:

Heat is never created nor destroyed it just changes form.

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Which of the following is a renewable source of energy?

Pani-rosa [81]

Answer: D

Explanation:

Hydropower

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3 years ago

What is the equation for potassium chloride

Lina20 [59]

The equation for this is:
<span>KCl</span>

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3 years ago

Read 2 more answers

One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million years. How long will it tak

VashaNatasha [74]

Answer:

1.49 × 10⁹ years

Explanation:

Step 1: Calculate the rate constant (k) for the nuclear decay of U-235

The decay follows first-order kinetics with a half-life (t1/2) of 703 × 10⁶ years. We can calculate "k" using the following expression.

k = ln2/ t1/2 = ln2 / 703 × 10⁶ y = 9.86 × 10⁻¹⁰ y⁻¹

Step 2: Calculate the time elapsed (t) so that the final amount ([U]) is 23.0% of the initial amount ([U]₀)

For first order kinetics, we will use the following expression.

ln ([U]/[U]₀) = -k × t

ln (0.230[U]₀/[U]₀) = -9.86 × 10⁻¹⁰ y⁻¹ × t

ln 0.230 = -9.86 × 10⁻¹⁰ y⁻¹ × t

t = 1.49 × 10⁹ y

6 0

3 years ago

Naproxen (sold under the name Aleve) is a nonsteroidal anti-inflammatory drug (NSAID), and is used to treat different types of p

alexandr1967 [171]

It is true it is used for inflammation and pain in muscle and joints it is also used for muscle and bone disorders

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3 years ago

The cis configuration has the substituted groups on opposite side of the double bond

rewona [7]

Answer:

False.

Explanation:

Hello there!

In this case, according to the attached picture, it is possible for us to evidence that cis- isomers have the substituted groups on the same side of the double bond whereas the trans- isomers have the substituted groups on the opposite side of the double bond.

In such a way, we infer that the given statement is FALSE, because that is the definition for the trans configuration.

Regards!

7 0

3 years ago