All categories

3 years ago

URGENT!!!! I WILL GIVE BRAINLIEST!! HELP ASAP!

Chemistry

2 answers:

mars1129 [50]3 years ago

5 0

Yes it does because it is matter

Luba_88 [7]3 years ago

4 0

law of conservation of matter states in any given system that is closed the transfer of matter in and out the amount of matter stays constant. the amount of matter in the system is conserved

You might be interested in

What does increase mean in science

snow_tiger [21]

Make more of, make it higher

6 0

3 years ago

Read 2 more answers

What is a polyatomic ion? Also, how do I identify that sulphate is a polyatomic ion?

n200080 [17]

polyatomic ion consists of more than one atom

sulphate is polyatomic ion

7 0

3 years ago

A substance is tested and has a pH of 8.4. What would you classify it as?

Leviafan [203]

Answer:

Explanation:

7 is neutral on a PH scale. Anything less is an acid and anything higher is a base. A Ph scale goes from 1-13. 8.4-7=1.4. This is a small change so it is considered a weak base. Can I get brainliest?

5 0

3 years ago

Read 2 more answers

Which reaction most accurately represents the dissociation of nitrous acid (hno2) in water?

yanalaym [24]

When nitrous acid (HNO₂) dissociates in water (H₂O), the reaction that best captures this process is:

HNO₂ (aq.) + H₂O ↔ H₃O⁺ (aq.) + NO₂⁻ (aq.)

How does one know about HNO₂?

The chemical designation for nitrous acid is HNO₂, and it is a monoprotic acid. Three elements—hydrogen(H), oxygen(O), and nitrogen(N), all compose it.
It is highly fragile in nature and only occurs in solutions.
It is employed to convert amines into diazonium salts.

Is HNO₂ a basic or an acid?

Acidity is assigned to nitrous acid (HNO₂). Once dissolved in water, it gives out H+ ions. Acid is a chemical that produces H+ ions in a water-based solution or gives the protons to other molecules.

Thus, HNO₂ is acid because it causes a mixture of water to contain H+ ions. In a 10 mM concentration, it possesses a pH of 2.67.

Learn more about nitrous acid here:

brainly.com/question/17055219

#SPJ4

8 0

2 years ago

Classify these substances? More than one answer may apply in each case.

dalvyx [7]

Answer:

N2 element, pure substance

O2 element, pure substance

N2O Compound, pure substance

Air (mostly N2 and O2 ) homogeneous mixture

Explanation:

N2, Nitrogen is known as the chemical element that is characterized by having atomic number 7 and that is symbolized by the letter N, in its molecular version, it is recognized as N2.

O2, Oxygen is the chemical element of atomic number 8, this molecular form is composed of two atoms of this element.

A chemical element is a type of matter, consisting of atoms of the same class.

N2O, Nitrous oxide is formed by the union of two molecules of nitrogen and one of oxygen, which is considered a chemical compound since it is a substance formed by the chemical combination of two different elements of the periodic table.

A pure substance is one that cannot change state or divide into other substances, except for a chemical reaction.

Air (mostly N2 and O2 ), it is a homogeneous mixture of gases that constitutes the earth's atmosphere. A homogeneous mixture is a type of mixture in which its components are not distinguished and in which the composition is uniform and each part of the solution has the same properties.

3 0

3 years ago