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True or false for these questions

We, know molecular mass of water is, M = 16 g/mol .

Given mass of water, m = 18 g.

We know, number of moles is given by :

[tex]n = \dfrac{18\ g}{16 \ g/mol}\\\\n = 1.125\ moles[/tex]

Now, 1 mole of any compound contains 6.022 × 10²³ molecules.

So, number of moles in 1.125 moles of water is 1.125 × 6.022 × 10²³ =

6.77 × 10²³ molecules.

Hence, this is the required solution.

Answer:

32.06 grams

Explanation:

One mole of sulfur is equal to 32.06 grams of sulfur.

Answer:ok

Explanatio

heres the answer 32.065 grams because 1 mole is equal to 1 moles Sulfur

this is just 60 divided by 15, which is 4

so your answer is 4A :)

Answer:

60 divided by 15? That's 4 if that's what you're asking

Answer: How hydroelectric plant is better over thermal power plant in creating less pollution?

Explanation:

The thermal power plant utilizes the coal as a fuel. The heat energy so produce after burning coal is used for generating electrical energy. The burning of the coal results in the production of pollutants. The carbon dioxide is also a chief pollutant of coal burning. This can pollute the air.

The hydroelectric plant is better than thermal power plant in the sense no fuel is required for this purpose the energy from water currents are used for generating electrical energy.  

So, the citizens should research about hydroelectric plant and try to know how it is efficient in providing routine energy supply and impact it exerts on the environment if used as a source of energy generation.

Answer:

i dont need

Explanation:

do u know ......

Answer:

X₃Z₂

Explanation:

A metal ion (X) with a charge of 2+  =  X²⁺

nonmetal ion (Z) with a charge of 3-   = Z³⁻

In a neutral compound, the charges but balance each other to remain neutral. However in this case, the charges are not balanced.

A simple way to make the charges balance is by tweaking the number of the ions present in the compound.

We do this by multiplying the metal ion with 3 and the non metal ion by 2.

That way we have;

Metal ion = 3X2⁺   (Total charge - 6⁺)

Non metal ion = 2Z3⁻  (Total charge -  6⁻)

The charges are now balanced. The formular of the compound is;

X₃Z₂

Answer:

Final pressure of the air inside is 0.83atm

Explanation:

Boyle's law is the gas law that relates the change in volume when pressure change at constant temperature and vice versa. The equation is:

P₁V₁ = P₂V₂

Where P is pressure and V is volume of 1, initial state and 2, final state of the gas

Replacing:

P₁ = 0.5atm

V₁ = 2.5L

P₂ = ?

V₂ = 1.5L

P₁V₁ = P₂V₂

0.5atm*2.5L = P₂*1.5L

0.83atm = P₂

Answer:

Autotrophs

Explanation:

They are responsible for the production of food. Root words "auto" for self and "troph" for food.

Answer:

The interdependence of agriculture and industry helps the development of both the sectors. The most important aspect of this inter dependence is that the products of one serve as important inputs for the other. Growth of one sector, thus means ample supply of inputs for the other.

Explanation:

Answer:

aluminum nitride

Explanation:

i think

mass of pentane : = 30.303 g

moles of Al₂(CO₃)₃ : = 0.147

Given

1. Reaction

C₅H₁₂+8O₂→6H₂O+5CO₂.

45.3 g water

2. 2AlCl₃ + 3MgCO₃ → Al₂(CO₃)₃ + 3MgCl₂

37.2 MgCO₃

Required

mass of pentane

moles of Al₂(CO₃)₃

Solution

1. mol water = 45.3 : 18 g/mol = 2.52

From equation, mol ratio of C₅H₁₂ : H₂O = 1 : 6, so mol pentane :

= 1/6 x mol H₂O

= 1/6 x 2.52

= 0.42

Mass pentane :

= mol x MW

= 0.42 x 72.15 g/mol

= 30.303 g

2. mol MgCO₃ : 37.2 : 84,3139 g/mol = 0.44

mol Al₂(CO₃)₃ :

= 1/3 x mol MgCO₃

= 1/3 x 0.44

= 0.147

Answer:

Balance

Explanation:

hope i helped

Answer:

19.5g

Explanation:

Given parameters:

Volume of propane gas = 9.95L

Unknown:

Mass of propane gas =  ?

Solution:

To solve this problem, find the number of moles first.

    At STP;

        22.4L of gas makes up 1 mole

         9.95L of gas will have a [tex]\frac{9.95}{22.4}[/tex]    = 0.44mole

So;

   Mass of propane gas  = number of moles x molar mass

Molar mass of propane  = 3(12) + 8(1)  = 44g/mol

    Mass  = 0.44 x 44  = 19.5g

Answer:

??

Explanation:

I can't tell, you don't have the answer choices up I can't see them

what are the in the drop-down boxes?

Answer:

A, 4,3,2

B, 1,1,2

C, 1,1,1,2

Answer:

C

I think not positive good luck tho

A heavily forested area is one that has a dense and large number of trees. The areas like mountainous tracks or the protected frosts areas of wildlife.

Hence the option D is correct, trees need to to be cleared for working efficiently.

Learn more about the  area that needs additional solar collectors to meet energy demand.

brainly.in/question/40583530.

Answer:

Kinetic - Kinetic energy is the energy of motion

Explanation:

Thermal energy - heat energy

Potential energy - energy that is stored

Hope this helped!

Have a supercalifragilisticexpialidocious day!

Answer:

I don't know if this is what you are looking for but maybe making paints out of things you find outside??? sry if this isn't what you were looking for

Answer:

Option 3: They are known as solutions

Explanation:

Examples of homogenous mixtures include:

I hope this helps :)

Answer:

1: X and Y

2: A

Explanation:

Answer:

how many grams of NH3 can be prepared from 77.3 grams of N2 and 24.2 grams of H2?

=80.4 g

Explanation:

I think.

Answer:

okay

Explanation:

I can help u u can ask question .....