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3 years ago

Organisms on earth are what-based life forms oxygen hydrogen carbon

Chemistry

2 answers:

slavikrds [6]3 years ago

8 0

Answer:

oxygen, and hydrogen and carbon... those are all things that make up the elements.

Explanation:

laila [671]3 years ago

5 0

I think that the answer is oxygen, oxygen plays a huge role in the evolution of organisms.

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Which scientist performed the cathode ray experiment leading to the discovery of electrons?

Mrrafil [7]

Answer:

E. Thomson

Explanation:

J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons.

https://www.khanacademy.org/science/chemistry/electronic-structure-of-atoms/history-of-atomic-structure/a/discovery-of-the-electron-and-nucleus

8 0

4 years ago

Read 2 more answers

Write the balanced nuclear equation for the following. (Use the lowest possible coefficients. Omit states-of-matter in your answ

olga55 [171]

Answer:

$_{93}^{232}\text{Np} + _{-1}^{0}\text{e} \longrightarrow _{92}^{232}\text{U}$

Explanation:

The unbalanced nuclear equation is

$_{93}^{232}\text{Np} + _{1}^{0}\text{e} \longrightarrow ?$

It is convenient to replace the question by an atomic symbol, $_{x}^{y}\text{Z}$ , where x = the atomic number, y = the mass number, and Z = the symbol of the element.

$_{93}^{232}\text{Np} + _{1}^{0}\text{e} \longrightarrow _{x}^{y}\text{Z}$

Then your equation becomes

$_{93}^{232}\text{Np} + _{1}^{0}\text{e} \longrightarrow _{x}^{y}\text{Z}$

The main point to remember in balancing nuclear equations is that the sums of the superscripts and of the subscripts must be the same on each side of the equation.

Then

93 – 1 = x, so x = 92

232 + 0 = y, so y = 232

Element 92 is uranium, so the nuclear equation becomes

$_{93}^{232}\text{Np} + _{-1}^{0}\text{e} \longrightarrow _{92}^{232}\text{U}$

3 0

3 years ago

Why do people talk wouldnt it be better if all we did was be quiet

Aleksandr [31]

Yes, it would. For a while. But then, as is human nature, we would long for socialization with other humans. But I do understand where you’re coming from.

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4 years ago

Identify the principle or law that identifies the relative age of the intrusion compared to layer Q.

Darya [45]

Answer:

The answer is C (law of superposition)

Explanation:

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3 years ago

How many molecules are produced when 59.4 g of water is decomposed by electrolysis to make oxygen and hydrogen?

BabaBlast [244]

The answer will be

.
.
.
4.88 x 1023 molecules of O2

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3 years ago