Help please I will give brainliest ASAP

Answer:

???

Explanation:

i would help answer but your post has no diagrams or at least there not showing up

Answer:

I believe the answer is A: *It is the simplest form of matter" not 100% sure but I think that's correct

Explanation:

I believe it's better for it to be more abundant because it's better to have more then less. Take water as an example. Water is an important factor to our survival and if we didn't have enough of that we would be in trouble.  Or if we needed food but there wasn't enough more people would be dying from starvation. It's better to have a little more than a little less.

For the Question "Which of the following represents a covalent compound?" we have

From the Question we are told

'3. c

Generally

a covalent compound is a kind of bond in which valence electrons are shared b/w the party atoms forming the bond

Therefore

We see covalent compound in CO_2 as they match perfectly the phenomenon that is covalent bonding

Therefore

For the Question "Which of the following represents a covalent compound?" we have

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Answer:

C is the correct answer

I hope this helps you:)

Explanation:

C slower, and the substance will be a liquid

Answer:

25.0g is the mass of sulfur

Explanation:

The sulfur and the oxygen are 50:50. That means there is 1 mole of S per mole of O.

To solve this question we need to convert the mass of O to moles, as moles of O = Moles of S, we can find the moles of S and its mass:

Moles O = Moles S:

12.5g O * (1mol / 16g) = 0.781 moles

Mass S:

0.781 moles * (32g / mol) =

Answer:

6 moles

Explanation:

According to stoichiometry and given chemical equation 2C₂H₆(g)+7O₂(g)→4CO₂(g)+6H₂O(l), 9 moles of water are produced when 3 moles of ethane are burned.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations.

In the given problem , as 2 moles of ethane produce 6 moles of water so according to stoichiometry

∴ 3 moles of ethane will produce 3×6/2=9 moles

Thus, 9 moles of water are produced when 3 moles of  ethane are  burned.

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Answer:

where is the question i can't see it

The outer shell of electrons is full, so there is no need to gain or lose electrons.

The hydrogen and oxygen atoms are more stable in water molecules as they get a complete valence shell when they bonded with other atoms.

In a chemical reaction, two or more reactants react with each other under the chemical condition to form two or more products. The Chemical reaction is defined as a reaction two or more reactant components react with each other to form two or more products.

The water is formed by reacting hydrogen and oxygen. The chemical reaction of water formation is shown below.

[tex]H_2(g)+O_2(g)\longrightarrow H_2O(l)[/tex]

The balanced chemical equation can be defined as a reaction where the number of moles of reactants is equal to the number of moles of products.

[tex]H_2(g)+ \frac{1}{2}O_2(g)\longrightarrow H_2O(l)[/tex]

The hydrogen atoms have one electron and the oxygen has two electrons less than the complete valence shell. But in the water molecule, every atom has a complete valence shell so atoms become more stable.

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Answer:

0.125L or 125 mL

Explanation:

0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

A stock solution is a concentrated solution that will be diluted to a solution of lower concentration.

stock solution = diluted solution

Where, M1 = concentration in molarity (moles/Litres) of the   concentrated solution

V2 = volume of the concentrated solution,

M2 = concentration in molarity of the dilute solution

V2 = volume of the dilute solution.                                

The volume of 3.00M KI solution can be calculated using the dilution equation:

Given:

M1 = 3.00M, M2 = 1.25M, V1 = x, V2 = 0.300L

M1V1 = M2V2

3.00M(x) = 1.25M(0.300L)

           x = 0.125L

Hence, 0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.

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Answer:

48.2 Fahrenheit

Explanation:

Temperature change = 9*C

By how many degrees Fahrenheit did the temperature change?

The relationship between Fahrenheit and degree Celsius is given as;

F = (9 / 5) C + 32

Inserting the value of C;

F = (9 / 5) * 9 + 32

F = 48.2 Fahrenheit

Answer:

N203

Explanation:

Answer:

n203

Explanation:

In the 23rd century, the mass ratio of H:S:O in sulfuric acid will remain 1:8:32.

We know from the law of definite proportions that irrespective of the path through which a chemical compound is obtained, it has a fixed composition by mass.

As such, the composition of a chemical substance does not vary. Therefore, in the 23rd century, the mass ratio of H:S:O in sulfuric acid will remain 1:8:32.

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Answer:

+2.5

Explanation:

So the oxidation number of S in Na2S4O6is +2.5.

Answer:

Explanation:

Oxidation number of Na = 1+   There are two of them, so it is 2*1 = 2

Oxidation number of O =  2-    There are 6 of them so 6 * 2-    =  -12

There are 4 S's so the oxidation number is 4*S

Now set up a small equation

2 + 4s - 12 = 0

And solve.

2 - 12 + 4s =0

-10 + 4s =   0

4s = 10

4s/4 =10/4

s = 2.5

Answer:

negative attraction

Explanation:

because a copper ion looses electrons, meaning it's negatively charged, and positives and negatives attract.

Answer:

S A T. NV

Explanation:

Answer:

3. They allow us to take energy from natural processes

Explanation:

There are two major sources of energy namely: renewable and non-renewable. Renewable sources of energy are those natural sources that gets replenished faster than they are utilized, which is contrary to non-renewable sources. Examples of renewable sources of energy are wind energy, solar energy, hydro (water) energy.

According to the question, one advantage or merit that renewable sources have over their counterparts is that they allow us to take energy from natural processes e.g. wind, sunlight etc.

Answer:

THE SUN!

Explanation:

Answer:

A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow. In a balanced chemical equation, the numbers of atoms of each element and the total charge are the same on both sides of the equation.

Answer:

chemical equation and chemical reaction

Explanation:

chemical equation is the symbolic representation Of a chemical reaction in the form of symbols

Answer: 10 always love yourself

Explanation:

Answer:

you need to include the bottom portion, not enough info

Explanation:

Answer:

15 g of CaCo₃

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CaO + CO₂ —> CaCo₃

From the balanced equation above,

1 mole of CaO reacted to produce 1 mole of CaCo₃.

Next, we shall determine the number of mole of CaCo₃ produced by the reaction of 0.15 mole of CaO. This can be obtained as follow:

From the balanced equation above,

1 mole of CaO reacted to produce 1 mole of CaCo₃.

Therefore, 0.15 mole of CaO will also react to produce 0.15 mole of CaCo₃.

Finally, we shall determine the mass of 0.15 mole of CaCo₃. This can be obtained as follow:

Mole of CaCo₃ = 0.15 mole

Molar mass of CaCo₃ = 40 + 12 + (16×3)

= 40 + 12 + 48

= 100 g/mol

Mass of CaCo₃ =?

Mole = mass / Molar mass

0.15 = Mass of CaCo₃ / 100

Cross multiply

Mass of CaCo₃ = 0.15 × 100

Mass of CaCo₃ = 15 g

Thus, 15 g of CaCo₃ were obtained from the reaction.

Answer:

If you're asking for the mass (grams)

then 739.21 g

Explanation:

No. of mols = mass/molar mass

Mass= Molar mass x No. of mols

Mass= 101.96 g/mol x 7.25 mols

Mass= 739.21 g