Calculate the number of atoms in a 3.31 x 10 g sample of lithium.
g

Answer:

Calculate the volume (in mL) of the 1.356 M stock NaOH solution needed to prepare 250.0 mL ... Glucose (molar mass=180.16 g/mol) is a simple, soluble sugar ... g of glucose in enough water to make 500.0 mL of solution. • Step 2: Transfer 18.6 mL of the

Explanation:

he required empirical formula based on the data provided is Na2CO3.H2O.

The term empirical formula refers to the formula of a compound which shows the ratio of each specie present.

We have the following;

Mass of sodium = 37.07-g

Mass of carbonate = 48.39 g

Mass of water = 14.54-g

Number of moles of sodium = 37.07-g/23 g/mol = 2 moles

Number of moles of carbonate = 48.39 g/61 g/mol = 1 mole

Number of moles of water = 14.54/18 g/mol = 1 mole

The mole ratio is 2 : 1: 1

Hence, the required empirical formula is Na2CO3.H2O

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Answer:

substance is related to the average kinetic energy of the particles of that substance

Explanation:

Answer:

As stated in the kinetic-molecular theory, the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles.

Explanation:

hope it will help you have a great day bye and Mark brainlist if the answer is correct

[tex]kai6417[/tex]

#carry on learning

Answer:

1.83 moles

Explanation:

1.83 moles

Answer:

Explanation:

Properties of Metal

1. Metals are ductile. ...

2. Metals are a good conductor of heat and electricity.

3. Metals have high tensile strength. .

4. Metals are sonorous.
5. Metals are hard.

Properties of non metal

1. High ionization energies.

2. High electronegativities.

3. Poor thermal conductors.

4. Poor electrical conductors.

5. Brittle solids—not malleable or ductile.

6. Little or no metallic luster.

7. Gain electrons easily.

This problem is providing us with the enthalpy of formation of Fe2O3 (s) and the enthalpy of reaction when it reacts with Al to form Al2O3 (s) and Fe. Thus, the enthalpy of formation of Al2O3 (s) is required and found to be -1675.7 kJ/mol as follows.

In chemistry, the heat involved in a chemical process can be quantified via the difference in the overall enthalpy of products minus that of reactants:

[tex]\Delta H_r=\Delta H_{products}-\Delta H_{reactants}[/tex]

Now, with the given reaction:

[tex]Fe_2O_3 (s) + 2 Al (s) \rightarrow 2 Fe (s) + Al_2O_3 (s)[/tex]

One can see both Al and Fe have zero as their enthalpies of formation for they are elements. In such a way, one can rearrange the previous formula as:

[tex]\Delta H_r=\Delta H_{Al_2O_3}-\Delta H_{Fe_2O_3}[/tex]

And hence plug in the given energies in order to find the required:

[tex]-851.5kJ/mol=\Delta H_{Al_2O_3}-(-824.2kJ/mol)\\\\\Delta H_{Al_2O_3}=-851.5kJ/mol+(-824.2kJ/mol)\\\\\Delta H_{Al_2O_3}=-1675.7kJ/mol[/tex]

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Answer:

29.5 days

Explanation:

How often does a full Moon occur? A full Moon happens roughly every 29.5 days. This is the length of time it takes for the Moon to go through one whole lunar phase cycle.

Answer:

648

Explanation:

what you're going to do your first is to convert the 192g to number of atoms

firstly you are going to convert 192 to moles using the formula reacting mass all over molar mass, into it that you're going to get 12 as your answer, you Dey multiply the 12 to avocados constant

in doing that you have I've gotten the number of atoms present in 192 g of oxygen

Answer:

Explanation:

Determining the Limiting Reagent

One reactant (A) is chosen, and the balanced chemical equation is used to determine the amount of the other reactant (B) necessary to react with A. If the amount of B actually present exceeds the amount required, then B is in excess, and A is the limiting reagent.

This problem is providing the initial volume and pressure of a gas in an engine cylinder and asks for the final pressure once the volume of the gas has decreased due to a compression. At the end, the result turns out to be 11.7 atm.

In chemistry, gas laws allow us to calculate pressure, volume, temperature or moles depending on a specified change and based on the concept and equation of the ideal gas, which derives the well-known gas laws; Boyle's, Charles', Gay-Lussac's and Avogadro's.

Thus, since this problem provides initial and final volume and initial pressure for us to calculate the final pressure, we understand we need to apply the Boyle's law as a directly proportional relationship between these two:

[tex]P_1V_1=P_2V_2[/tex]

Thus, we solve for the final pressure, P2, to get:

[tex]P_2=\frac{P_1V_1}{V_2}=\frac{1.0atm*175mL}{15mL}\\ \\ P_2=11.7atm[/tex]

Learn more about ideal gases: brainly.com/question/8711877

Answer:

How many moles KCl in 1 grams? The answer is 0.013413582325

1 mole is equal to 1 moles KCl, or 74.5513 grams.

447.3078 is the answer

Explanation:

~Cornasha_Weeb

Answer:

Explanation:uum i cant see anything but yeah I think its c

Answer:

4-methly-2-pentyne

Explanation:

Answer:

53.545803079954496

Explanation:

Brainliest pls

Lin never forgot how it felt to be left out

Answer:

to be left out

Explanation:

Lin never forgot how it felt to be left out.

In the paragraph given, we see Lin being left out of a play. She wanted to be Dorthy but was told she couldn't. This led to feelings of being left out.

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

Answer:

by using this formula you will get it

Explanation:

number of mole = number of particles÷ Avogadro's number

n=3.51×10^23÷ 6.02×10^23

n = 0.58 moles

Answer:

mole = reactingmass = 7.890= 0.142 mol

molarmass 55.8

atoms = mol × alvagadro constant

0.142 × 6.02 × 10^23

=8.5484 × 10^22 Atoms

Answer:

6 neutrons and 6 electrons

Explanation:

I got it right ;) good luck

Answer: the mass of 3.01 atoms of chlorine is 35.46/2 = 17.73 g.

Explanation: hope its correct

step by step: molar mass: (2 x 35.46) g/mol = 70.92 g/mol

1 mole chlorine = 6.02 x 10^23 molecules of chlorine.

Mass of 6.02 x 10^23 molecules chlorine = 70.92 g

Mass of 3.01 x 10^23 molecules chlorine = 70.92 x(3.01 x 10^23)/(6.02 x 10^23)g

= 35.46 g

ΔH₁ = ΔH₂ - ΔH₃

ΔH₁ = -635.1-(178.3) KJ

ΔH₁ = -813.4 KJ

Answer:

B

Explanation:

neutrons + atomic number/proton/electron for a neutral atom = mass number

e.g

mass number of Chlorine 35.5

proton number 17

neutron number will be 35.5-17 = 18.5

Therefore.....

your question deduced says

atomic number is 5

mass number is 11

neutron number is however mass number minus atomic number 11-5 =6

Answer:

1. combustion

2. decomposition

3. decomposition

4. combination

5. decomposition

6. decomposition

Explanation:

combination of a reaction is when 2 more or elements/ compounds combine to form a compound. example: (A+B→AB)

decomposition of a reaction is when a chemical breakdown. example: (AB→A+B)

a combustion reaction is when an element/ compound reacts with oxygen to form the product of water and carbon dioxide.

example: ( [tex]C_{x}[/tex] [tex]H_{y}[/tex] + [tex]O_{2}[/tex] → [tex]H_{2}[/tex]O + [tex]CO_{2}[/tex] )

Answer:

5

35 divided by 7 = 5

Explanation:

Hope this helps!!

Liyah

Answer:

The answer is true

Explanation:

the ovary is a tubular structure and contains ovules