How many Atoms are in H2COCH? Need asap pleassseee!

A buffer is prepared by adding 12.0g of ammonium chloride (NH4Cl) to 250mL of 1.00 M NH3 solution?The pH is 9.3 Write the net io

solniwko [45]

Answer:- $NH_3(aq)+H^+(aq)\rightleftharpoons NH_4^+(aq)$

Explanations:- The solution we have is a buffer solution and we know that a buffer solution resists a change in its pH if a strong acid or base is added to it.

Here, the buffer solution we have is of a weak base and it's conjugate acid. So, a strong acid(nitric acid) is added to this buffer then it reacts with the base present in the buffer so that the acid could be neutralized. This is called buffer action.

The net ionic equation is written as:

$NH_3(aq)+H^+(aq)\rightleftharpoons NH_4^+(aq)$

Note that $HNO_3$ is a strong acid and nitrate ion is the spectator ion so it is not included in the net ionic equation.

8 0

3 years ago

HELP PLZ ITS A TEST.

tensa zangetsu [6.8K]

Answer:

The answer to your question is below

Explanation:

1 ) Which of the following is a chemical property.

A. Ability to become magnetic this is wrong, it's a physical property

B. Ability to conduct electricity this is wrong, it's a physical property

C. Ability to conduct heat this is wrong, it's a physical property

D. Ability to react with acid This is the right answer

2 ) You heat two substances, A and B. Both substances change color. When cooled, substance B returns to its original color, but substance A does not. What most likely happened?.

A. Physical change occurred in both substances This is wrong, a physial change only happens in substance B

B. A physical change occurred in substance A, and a chemical change occured in substance B. This is wrong, a physical change occurred in substance B and a chemical change occurred in substance A.

C. A chemical change occurred in substance A, and a physical change occurred in substance B. This is the right answer is exactly what happens

D. A chemical change occurred in both substances This answer is wrong.

3 ) how many grams are in 2.5 pound sample? Express your answer in scientific notation with three significant figures. ( 1 pound= 453.592 grams).

Rule of three

1 pound ------------------- 453.592 g

2.5 pounds --------------- x

x = 2.5(453.592)/1

x = 1133.98 g = 1.13 x 10³ g letter D

7 0

3 years ago

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10. The Proton is special! What does it tell us? The proton tells me..

Dovator [93]

Answer:

These two numbers are fixed for an element. The mass number tells us the number the sum of nucleons of protons and neutrons in the nucleus of an atom. The atomic number also known as the proton number is the number of protons found in the nucleus of an atom. ... The atomic number uniquely identifies a chemical element.

Explanation:

8 0

4 years ago

Which change favors the products in this reversible reaction n2o4(g)+58 kj 2no2 (g)?

Ksenya-84 [330]

According to Le Chatelier's Principle, the position of equilibrium moves to counteract the change, the position of equilibrium will move so that the concentration of products of chemical reaction increase, if:

1) increase temperature, because this endothermic reaction.

2) increase concentration of reactant.

3) decrease pressure of the system, so reaction moves to direction where is more molecules.

7 0

3 years ago

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Balance the following equations

Shtirlitz [24]

2K + Cl₂ ⇒ 2KCl

2Ca + O₂ ⇒ 2CaO

6 0

4 years ago