Can someone please do a True or false for these PLEASE

Answer:

The mass percentage composition of nitrogen in the sample of the cleaning detergent is approximately 16.78%  

Explanation:

The given mass of the sample of the cleaning detergent, m₁ = 20.5 g

The mass of the ammonium hydroxide, NH₄OH in the detergent, m₂ = 8.61 g

The molar mass of NH₄OH = 35.04 g/mol

The molar mass of nitrogen, N = 14.01 g/mol

Therefore, the mass, m₃ of nitrogen, N, in 8.61 g of ammonium hydroxide, NH₄OH, is found as follows;

m₃ = (14.01/35.04) × 8.61 g = (402,087/118,800) g ≈ 3.44 g

The mass of nitrogen, N, in the ammonium hydroxide, NH₄OH, contained in the 20.5 g sample of the cleaning agent, m₃ ≈ 3.44 grams

The percentage composition of nitrogen in the sample of the cleaning detergent, %N is given as follows;

[tex]\% Composition = \dfrac{Mass \ of \ component}{Total \ mass \ of \ cleaning \ detergent} \times 100[/tex]

Therefore;

%N ≈ ((3.44 g)/(20.5 g)) × 100 ≈ 16.78 %

The percentage composition of nitrogen, %N ≈ 16.78%.

Answer: A. ( VO2)

Explanation:

Answer:

B) VO

Vanadium(II) oxide is the inorganic compound with the idealized formula VO.

Answer:

H20is water andN20is nitrogen 4 oxide

Answer:

It's about mass of 40.1⋅g

Explanation:

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Answer:

there are 4 possible isomers

Answer:

Chemistry is a branch of a science which explain about study of composion properties and the transformation or change of matter.

Answer:

No change

Explanation:

Since rubber are elastic in nature, there's no change in it's state even if it is hammered. So, it will be in it's initial state as it was before.

Water is the solvent in the saline solution. Hence, option D is correct.

A solute is something being dissolved, a solvent is a thing dissolving the item, and the solution is the mixture of the two items.

In a hospital, bags of saline solution are used to rehydrate patients. They are made by dissolving a specific amount of salt in water. Water is the solvent in the saline solution.

Hence, option D is correct.

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Answer:

2. Chemical reactions changes occur when the bonds between atoms in a molecule are created or destroyed.

3. When you reach your its boiling point, the molecules in liquid have enough energy to become a gas.

4. When you have a solid with more than one type of compound, it is called a mixture.

5. A Crystal is a form of solid where the atoms are arranged is a very specific order.

6. If you have different types of molecules dissolved in a liquid, it is called a solution

Answer:

I think it's positive charge

Answer:

The SI system : The international system of units.

It is a scientific method of expressing the magnitudes or quantities of important natural phenomena.

Benefits of SI system

Answer:

increase temperature, increase surface areas, add catalyst, stir

The rate of reaction can be increased with the increase in temperature, surface area, adding catalyst and allowing stirring. Thus, option C is correct.

The rate of reaction is given as the rate of formation of product or the rate of disappearance of reactant in unit time.

The rate of reaction can be affected with:

Thus, the rate of reaction can be increased with the increase in temperature, surface area, adding catalyst and allowing stirring. Thus, option C is correct.

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Answer:

Well one characteristic is electical energy transforms into  thermal energy and gases and the state of matter(one of the distinct form i which  matter exist)

Answer:

Sodium.  

Explanation:

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na.

Answer:

sodium

atomic mass 22.99

atomic number 11

period 3 group 1 1a

sodium is also an Alkali metal

Explanation:

I have a periodic table on my computer I hope I helped

Answer:

Thermal energy transfers hear from the students hand to the ice

Answer:

The answer is below

Explanation:

1.

Tap water - Mixtures

Sodium - Compound

Nitrate - Compound

Rust - Compound

Distilled - Compound

Water - Compound

Paint - Mixture

Sugar - Compound

Carbon dioxide  - Compound

Brine - Mixture

Apple Juice - Mixture

Petrol - Mixture

Ink - Mixture

Alcohol - Compound

____________________________________________

A) - Chromatography

B) - Fractional Distillation

C) Simple Distillation

D) Filtration

Q.1 Classify the following as mixture or compound :

MIXTURE :

COMPOUND :

Q.2

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Answer:

The cathode is the electrode where reduction takes place.

so

reduction occur in Cathode in an electrochemical cell.

Answer: Cathode

Explanation:

.

Answer:

B. Biosphere.

Explanation:

Answer:

C

electrons are negatively charged particles

Answer: D

Explanation:

just took the test

Answer:

don't know..............

Answer:

can only form one hydrogen bond each

Explanation:

can only form one hydrogen bond each

Answer:

MgO2

H202

NH4)2SO4

Explanation:

hope this helps you

Answer:

a measuring cylinder containing water only.

Explanation:

If we want to measure the volume of an irregular object. We need a properly calibrated measuring cylinder filled with water of known volume.

The irregular object is now inserted into the measuring cylinder containing water and the change in the volume of water is noted. The volume of the irregular object is now obtained as;

New volume of water - initial volume of water.

Hence, only a measuring cylinder filled with water is required to measure the volume of a small irregularly- shaped stone.

Answer:

a

Explanation:

the rat felt the normal diet with vitamin are gain weight than the rat felt with diet

Answer:

О

because it has the fewest number of electrons

Answer:

1) atomos. 2) uncuttable.

Explanation:

none

Answer:

Amino Acid

Explanation:  

It's part of the Amino group, which are substituted hydrocarbons.

When NH₂  and  COOH  replaces hydrogens on the same carbon atom in a molecule, an Amino acid is formed.

What group is a COOH?

COOH : a Carboxylic Acid group!

The pots and other articles made from clay hardened by heat is called ceramics..

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