Which of the following represents the molecules of one compound and
atoms of one element?

Answer: c

Explanation:

Answer:

The nucleus is surrounded by the endoplasmic reticulum, which is covered in spots by ribosomes.

Explanation:

When the animal cell divides, the nucleus breaks up, and the nuclear envelope falls apart.

Answer:

i do believe its 7

Explanation:

Answer:84

Explanation:

Answer:

No.

Explanation:

We can't build a fire on the moon, because moon's atmosphere lacks oxygen.

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No lightning of a fire on the surface of the moon is impossible..

[tex] \huge \green {reasons - }[/tex]

Answer:

3.60X10^-12 is equal to 0.360X10^-11 (move decimal one place left)

Now you can add 3.60X10^-11 and 0.360X10^-11:

3.60X10^-11 + 0.360X10^-11 = 3.96X10^-11

You're really just adding 3.60 to 0.36 since the "X10^-11" is the same for both.

Answer:

Sr-84 + He-2  -> Na-25 + Pm-61

Explanation:

Answer:

6.022  ×10(index 23) / 7.5 = 0.8293 ×10(index 23)

Explanation:

molar mass of C =  12gmol

therefore in 12g of C there is one mole or an amount of 6.022 ×10(index 23)

∴12g/6.02210(index 23) ×1.6g

Answer:

C.  662.60

Explanation:

the mass of Mn is about 54 grams/mol, (multiply that by 2 since there are 2 Mn's).

the mass of Se is about 79 grams/mol, so multiply that by 7

if you add them, you get 662.60 (approxamitly)

Answer:

C) 662.60

Explanation:

~~55*2 + 79*7 = 110 + 553 = 663 (~~662.60)

Answer:

hope u umderstood ! if explanation needed then conta t

Nitrogen and hydrogen react to form ammonia and is a combination reaction. The grams of hydrogen used in the reaction with nitrogen to form ammonia is 2.0 grams.

Mass is the weight or the product of the volume and density of the substance. It can be calculated as, [tex]\rm volume \times density.[/tex]

Given,

Mass of nitrogen = 10.0 grams

Mass of ammonia = 12.0 grams

Mass of hydrogen = x gram

Solving for x:

[tex]\begin{aligned}\rm 10 + x &= 12\\\\\rm x &= 12.0 - 10.0\\\\&= 2.0 \;\rm grams\end{aligned}[/tex]

Therefore, 2.0 grams of hydrogen is required to react with 10.0 grams of nitrogen to produce 12.0 grams of ammonia.

Learn more about mass here:

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Answer: Ca^2+ and P^3-

Explanation:

Answer:

See Explanation

Explanation:

i) The equation of the dissolution of BF2 is;

BaF2(s)⇄Ba2+(aq)+2F-(aq)

ii) Ksp =[Ba2+]  [2F-]^2

iii) Let the concentration/solubility of [Ba2+] and [2F-] be x

Ksp = [x] [2x]^2

Ksp = 4x^3

iv) x =∛Ksp/4

Answer:

because life would have use fossil for their benefits.

Answer:

it most likely increases

Answer:

2na+o2

Pls mark as brainliest

Answer:

A

Explanation:

2NA + 02

These are your reactants, which are always on the left side of the chemical equation.

hope this helped mark brainliest pls xx

Answer:

Different properties

Explanation:

They are different.

Answer:

12

Explanation:

i feel like its 12 because moles are medium sized but are they adult moles or baby moles or growing moles

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.803moles of nitrogen gas  are there in  a 18 L tank of nitrogen gas at STP.

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.

Mathematically,

number of moles of any ideal gas =given volume ÷Volume occupied by one mole of a ideal gas at STP

Volume occupied by one mole of a ideal gas at STP=22.4L

given volume of nitrogen gas= 18 L

substituting all the given values in the above equation we get,

number of moles of nitrogen gas =18 L ÷22.4L

number of moles of nitrogen gas =0.803moles

Therefore, 0.803moles of nitrogen gas  are there in  a 18 L tank of nitrogen gas at STP.

To know more about mole, here:

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Answer:

D. Nal

Explanation:

Took a K12 test and it was correct! :3 Hope this helps!

Answer:

Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms.

Answer:compound

Explanation:

Answer:

15

Explanation:

because since the outer shell has 5 electron then add 5 and 10 to get 15

Answer:

355.2 grams

Explanation:

m = M×n= (40 + 2(16+1))×4.8= 355.2 (g)

Answer:

4L

Explanation:

Explanation:

Transmutation, conversion of one chemical element into another. A transmutation entails a change in the structure of atomic nuclei and hence may be induced by a nuclear reaction (q.v.), such as neutron capture, or occur spontaneously by radioactive decay, such as alpha decay and beta decay (qq. v.).

Answer:

3 moles

Explanation:

3 moles atoms are needed to react with 50 grams of O2 gas.

Answer:

An aqueous solution is water that contains one or more dissolved substances. The dissolved substances in an aqueous solution may be solids, gases, or other liquids.