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3 years ago

A substance that contains hydrogen that may be replaced by a metal is a/an

2 answers:

3 0

<span>The substance that contains hydrogen that may be replaced by a metal is called an acid. The answer therefore to this item is letter A. When the compound is dissolved in water, it forms H+ ion and the anion that is part of the compound. It may be classified as strong or weak. </span>

mote1985 [20]3 years ago

3 0

<span>The correct answer is option A. A substance that contains hydrogen that may be replaced by a metal is an acid. An acid is of the form RCOOH. For example, if it is made to react with a metal, then the by-product of the reaction will be a salt. RCOOH + Na (Sodium) = RCOONa (salt).</span>

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Describe how you would make 6.0 L of a 0.100 M KCl solution from a 4.0 M stock KCl solution.

Galina-37 [17]

Answer:

0.15 l of 4.0 m stock KCl solution should betaken

Explanation:

N1V1=N2V2

6*0.1=V2*4

V2=0.15L

5 0

3 years ago

PEER COUNSELING 2 HELP! 13 POINTS

bija089 [108]

D. or C. I think it is more D. than anything else

8 0

3 years ago

Read 2 more answers

7. How many moles of mercury(ii) oxide, hgo, are needed to produce 12. 5 g of oxygen, o2? 2 hgo(s) --->2 hg(l) o2(g)

svetoff [14.1K]

Moles are the division of the mass and the molar mass. The moles of mercury (ii) oxide in the decomposition reaction needed to produce oxygen are 0.781 moles.

<h3>What is a decomposition reaction?</h3>

A decomposition reaction is a breakdown of the reactant into simpler products. The decomposition of mercury (ii) oxide can be shown as:

2HgO(s) → 2Hg(l) + O₂(g)

From the reaction, it can be said that 2 moles of mercury (ii) oxide decomposes to produce 1 mole of oxygen.

The moles of oxygen that needs to be produced are calculated as:

Moles = mass ÷ molar mass

= 12.5 gm ÷ 32 gm/mol

= 0.39 moles

0.39 moles of oxygen are needed to be produced.

From the stoichiometric coefficient of the reaction, the moles of HgO is calculated as: 2 × 0.39 = 0.781 moles

Therefore, 0.781 moles of HgO are required in the reaction.

Learn more about moles here:

brainly.com/question/3801333

#SPJ4

5 0

2 years ago

Facing the wind. A) windward B) subaric C) monsoon D) biotic

SpyIntel [72]

I think B
STEP-by STEP EXPLANATION

8 0

3 years ago

Indicate what happens to the concentration of Pb2+ in each half cell

Taya2010 [7]

Answer:

Your questions requires diagrams of the cell to get which one is on the left or right. However, see the attached file below

The correct answer is (d) the left half-cell will decrease in concentration; and the right half-cell will increase in concentration.

Explanation:

The concentration of the Pb2+ increases in the oxidation half cell while the concentration of the Pb2+ decreases in the reduction half cell during the reaction.

In the Left Beaker (Left half cell), their is less concentration

Pb(s) ---> Pb2+(aq) + 2 e- Concentration of Pb2+(aq) increase ; Electrons going out from this side

In the Right Beaker (right half cell), their is more concentration

Pb2+(aq) + 2 e- ---> Pb(s) Concentration of Pb2+(aq) decrease ; Electrons coming in to this side

Electrons will flow from Left to Right direction.

3 0

3 years ago