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777dan777 [17]
4 years ago
13

Help ASAP please. I don’t understand.

Chemistry
1 answer:
WARRIOR [948]4 years ago
4 0

Answer:

a

Explanation:

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HELP ASAP!!
dalvyx [7]
I think it is Botany.
7 0
3 years ago
Even though we have known of many nuclear energy technologies for about one century some of these technologies have not yet been
Romashka [77]

<u>Answer:</u> The nuclear fission reaction of U-234.043 is written below.

<u>Explanation:</u>

In a nuclear reaction, the total mass and total atomic number remains the same.

For the given fission reaction:

^{234.043}_{92}\textrm{U}\rightarrow ^{137.159}_{54}\textrm{Xe}+^{A}_{38}\textrm{Sr}+3^{1.0087}_0\textrm{n}+180MeV

<u>To calculate A:</u>

Total mass on reactant side = total mass on product side

234.043 = 137.159 + A + 3(1.0087)

A = 93.858

Now, the chemical equation becomes:

^{234.043}_{92}\textrm{U}\rightarrow ^{137.159}_{54}\textrm{Xe}+^{93.858}_{38}\textrm{Sr}+3^{1.0087}_0\textrm{n}+180MeV

Hence, the nuclear fission reaction of U-234.043 is written above.

7 0
3 years ago
What kind of properties can only be observed when a substance changes into a different substance?
Shkiper50 [21]
<h3>Answer:</h3><h2>Chemical properties</h2><h3>Explanation:</h3>

By its very definition, a chemical property is one which is exhibited as a result of a chemical reaction. This may happen during or after the reaction. This is because in a chemical reaction there is a transformation in the physical composition of the components and this directly affects its chemical properties.

4 0
3 years ago
A weightlifter can lift 495 lbs. How many kg is that? Please provide a step-by-step procedure.
iogann1982 [59]

Answer:

Explanation:

2.2 pounds = 1 kg

495 pounds = x

2.2/495 = 1/x               Cross multiply

2.2*x = 495 * 1             Divide by 2.2

2.2x/2.2 = 495/2.2

x = 225 kg

5 0
3 years ago
Which of the following statements is false?
jeka94

Answer:

a is write

Explanation:

Why are all ionic compounds crystalline in structure?

Ionic compounds are generally hard, but brittle. ... The repulsive forces between like-charged ions cause the crystal to shatter. When an ionic crystal breaks, it tends to do so along smooth planes because of the regular arrangement of the ions.

6 0
3 years ago
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