The Sun provides energy to the Earth through which of the following processes?

Chemistry

2 answers:

scoundrel [369]3 years ago

5 0

Answer:

I believe your answer is D)...

strojnjashka [21]3 years ago

4 0

The sun provides energy through nuclear fusion by fusing the atoms of hydrogen and helium in the suns core, so the answer is D

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1. Factorise 3х - 10x +8

lara [203]

Answer:

This question is incomplete, it should read 3x² - 10x + 8. The answer is (3x-4) (x-2).

Please find the solved explanation to this question attached

Explanation:

To factorize means to write an expression as a product of its factors using brackets. It is the opposite of expanding an algebraic expression i.e. it involves contracting it using factors common to the variables.

In this question, 3x² - 10x + 8 is given

For the sum, which is -10x, and product, which is 24x², -6x and -4x are the two variables whose sum will give rise to -10x and also whose product will give rise to 24x².

We have;

3x² - 10x + 8

3x² - 6x - 4x + 8

Next, we look for factors of each pair of expression.

3x (x - 2) - 4 (x - 2)

(3x - 4) (x - 2)

3 0

3 years ago

The information below describes a redox reaction.

lord [1]

Answer: option 1) 2Cr3+(aq)+6Cl-(aq) ------> 2Cr(s)+3Cl2(g)

Explanation:

1) Write the oxidation half-reaction:

$2Cl^-(aq)---\ \textgreater \ Cl_2(g)+2e^-$

2) Write the reduction half-raction:

$Cr^{3+}(aq)+3e^{-}---\ \textgreater \ Cr(s)$

3) Multiply each half-reaction by the appropiate coefficient to equal the number of electrons of both half-reactions.

$6Cl^{-}(aq)---\ \textgreater \ 3Cl_2(g)+6e^{-}

2Cr^{3+}(aq)+6e^{-}---\ \textgreater \ 2Cr(s)$

4) Add both half-reactions

$2Cr^{3+}+6Cl^{-}(aq)---\ \textgreater \ 2Cr(s) +3Cl_2(g)$

And that is the answer. You can count the atoms and charges on every side and check they are equal.

5 0

3 years ago

Given the reaction: 4 NH3(g) + 5 O2(g) → 4 NO (g) + 6 H2O When 1.20 mole of ammonia reacts, how many moles of water are produced

Ganezh [65]

Answer:

When 1.20 mole of ammonia reacts, 1.8 moles of water are produced.

Explanation:

The balanced reaction is:

4 NH₃(g) + 5 O₂(g) → 4 NO (g) + 6 H₂O

By stoichiometry of the reaction, the following amounts of moles participate in the reaction:

NH₃: 4 moles
O₂: 5 moles
NO: 4 moles
H₂O: 6 moles

Then you can apply the following rule of three: if by stoichiometry 4 moles of ammonia produce 6 moles of water, 1.2 moles of ammonia will produce how many moles of water?

$moles of water=\frac{1.2 moles of ammonia*6 moles of water}{4 moles of ammonia}$