Explain how to count the number of elements in a compound.

Answer:

so i think correct answer is chemmical

Answer:

94.9% yield

Explanation:

Percent yield = actual yield/theoretical yield x 100

So you will divide the actual yield (what they really produced) over the theoretical yield (what they expected to produce). This will give you a decimal answer, which you multiply by 100 to get a percent.

169g/178g = 0.949 x 100 = 94.9%

Answer:

Ionization energy, electronegativity, and lattice energy are the factors that influence the formation of ionic bonds of elements.

Answer:

60.5 L

Explanation:

If the gas temperature is constant, we can use Boyle's law:

P1V1 = P2V2

V2 = P1V1 / P2

P1 = 12.7 kPa

V1 = 40.0 L

P2 = 8.4 kPa

V2 = (12.7 kPa) (40.0 L) / (8.4 kPa) = 60.5 L

Actually If you look very close to a plant you see this:

And to answer your question leaves are green due to sun nutrients water and im not sure  what else

Answer:

Both in group 1

Explanation:

Sodium is a very reactive metal

Chlorine is a very reactive non metal

Both have one Valence electron

Answer:

D

Explanation:

Because the spin quantum number is right and the order of filling is right.

Answer:

Poop

Explanation:

Answer:

convergergent

Explanation:

Mountains form where two continental plates collide. Since both plates have a similar thickness and weight, neither one will sink under the other. Instead, they crumple and fold until the rocks are forced up to form a mountain range. As the plates continue to collide, mountains will get taller and taller.

Answer:

the answer is B

hope this is the answer you are looking for

Explanation:

Answer:

The solution is acidic.

Explanation:

To know which option is correct, we shall determine the pH of the solution. This can be obtained as follow:

Concentration of Hydrogen ion [H⁺] = 5.7×10¯⁷ M

pH =?

pH = –Log [H⁺]

pH = –Log 5.7×10¯⁷

pH = 6.2

pH scale reads as follow:

0 to 6.9 => Acidic

7 => Neutral

8 to 14 => Alkaline / basic

The pH of the solution (i.e 6.2) falls between 0 and 6.9 which indicates acidic.

Therefore, the solution is acidic.

Answer:

bohrs model ios inversly to the pressure an modren model is inversly to the force

Explanation:

Answer:

B because the particles of the container 2 is faster thus having more kinetic energy and heat

Explanation:

Answer:

pH is the number given to a substance of how powerful it is before 7 or beyond 7.

the solution is an acid.

Explanation:

Pls mark BRAINLIEST

Answer:

August 15, 1971

The nine sheikhdoms still had not agreed on terms of union by 1971, however, prompting Bahrain to declare itself fully independent on August 15, 197

1.A solution has a pH of 5, calculate the pOH, [H+], and [OH-]. Classify the solution as an acid, base, or neutral solution.

it's an acid

Explanation:

I hope that this helps

Answer:

balanced equation of glucose

6CO2 + 6H2O----------C6H12O6 + 6O2

in the presence of sun light.

Answer:

C. oil and vinegar

Explanation:

A heterogeneous mixture is a mixture where the components are not uniform in composition, like oil and water. They don't mix. When you mix oil and vinegar, you have 2 layers because oil is less dense than vinegar.

Answer:

this is a homework app, not a tell people to follow your ig app

Explanation:

Answer:

625.46 °C

Explanation:

We'll begin by converting 19 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

T(°C) = 19 °C

T(K) = 19 °C + 273

T(K) = 292 K

Next, we shall determine the Final temperature. This can be obtained as follow:

Initial volume (V₁) = 3.25 L

Initial temperature (T₁) = 292 K

Final volume (V₂) = 10 L

Final temperature (T₂) =?

V₁/T₁ = V₂/T₂

3.25 / 292 = 10 / T₂

Cross multiply

3.25 × T₂ = 292 × 10

3.25 × T₂ = 2920

Divide both side by 3.25

T₂ = 2920 / 3.25

T₂ = 898.46 K

Finally, we shall convert 898.46 K to celsius temperature. This can be obtained as follow:

T(°C) = T(K) – 273

T(K) = 898.46 K

T(°C) = 898.46 – 273

T(°C) = 625.46 °C

Therefore the final temperature of the gas is 625.46 °C

Answer:

nitrogen in atmospheres of a sample is 0.679

Answer:

82 g S

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 81.6 grams of sulfur are involved in this reaction.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

2 Fe + 3 S[tex]\rightarrow[/tex]Fe[tex]_2[/tex]S[tex]_3[/tex]

mass of iron = 95 grams

Molar mass of iron=55.8450 g/mol

number of moles of iron =Given mass÷ Molar mass of iron

number of moles of iron=95÷ 55.8

number of moles of iron=1.70 moles

The mole ratio between iron and sulfur is 2:3

moles of sulfur = (3/2) moles of iron

moles of sulfur = (3/2)×1.70

moles of sulfur=2.55 moles

Mass of sulfur= number of moles of sulfur× Molar mass of sulfur

                       =2.55× 32

                       =81.6g

Therefore, 81.6 grams of sulfur are involved in this reaction.

To know more about mole, here:

https://brainly.com/question/15209553

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Answer:

I think this is it. and 38 points??

Answer:

10 L

Explanation:

The equation of the reaction is;

2BaO2 = 2BaO + O2

Number of moles of  BaO2 = 114.7 g/169.33 g/mol = 0.677 moles

From the reaction equation;

2 moles of BaO2 yields 1 moles of O2

0.677 moles of BaO2 yields 0.677 * 1/2 = 0.3385 moles of oxygen

Hence;

PV=nRT

V = ?

P = 127400 Pa or 1.257 atm

T = 455 K

n = 0.3385 moles

R = 0.082 atmLmol-1K-1

V = nRT/P

V = 0.3385 * 0.082 * 455/1.257

V= 10 L

Answer: Its c

Explanation: i did it

what element is A??????

1,516.31168 grams of Magnesium Hydroxide