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zmey [24]
2 years ago
9

ls zinc qnd hydrogen chloride combining into sinc chloride and hydrogen gas a chemical or physical change?​

Chemistry
1 answer:
rewona [7]2 years ago
3 0

Answer:

chemical because it turned into a new compound

Explanation:

is zinc and hydrogen chloride combining into zinc chloride and hydrogen gas a chemical or physical change?​

physical change is like  boiling, melting, freezing, and shredding

but its still the same compound

chemical is like it turns into something else like a new compound

Zn + 2HCl = ZnCl2 + H2(g)

Metal + Acid → Hydrogen + Acid Anion

new compound forms in this reaction

quora

Les McLean

toppr

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Which law relates to the ideal gas law?
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The equation of state for a hypothetical ideal gas is known as the ideal gas law, sometimes known as the general gas equation. i.e. PV = nRT or P1V1 = P2V2.

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3 0
1 year ago
Which substance is an electrolyte?<br><br> (1) O2 <br> (2) Xe <br> (3) C3H8<br> (4) KNO3
defon

(1) O2  Is a Nonelectrolyte: because it does not ionize when dissolved in a solution

(2) Xe Is a Nonelectrolyte: because it does not ionize when dissolved in a solution

(3) C3H8 Is a Nonelectrolyte: because it does not ionize when dissolved in a solution

(4) KNO3 Is an electrolyte: because it ionizes when dissolved in a solution

Electrolytes:

Electrolytes are the substance whose aqueous solution conducts electricity. These are mainly two types:

1. Strong electrolytes

2. Weak electrolytes:

Strong electrolytes:

Strong electrolytes have following properties:

1. They are ionic compounds.

2. They are completely separates into their ions when dissolved in water.

3. In solution form they conduct electricity due to present of ions but in solid form means neutral molecule does not conduct electricity.

Weak electrolytes:

Weak electrolytes are partially ionizes in water.

In general strong electrolytes are strong acid  and  strong base while weak electrolytes are weak acid and weak bases.

Nonelectrolyte:  

The substance which does not ionize when dissolved in a solution is called non-electrolyte. It is a  poor conductor of electricity.

3 0
3 years ago
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Use the word react and product in a sentence that explains what a chemical reaction is
SashulF [63]

Answer:

hihihihihihihihihihihihihiihihihihihihihihihihihihiih

Explanation:

8 0
3 years ago
) determine the theoretical yield and the percent yield if 21.8 g of k2co3 is produced from reacting 27.9 g ko2 with 29.0 l of c
Airida [17]
The Balanced Chemical Equation is as follow;

                         4 KO₂  +  2 CO₂    →    2 K₂CO₃  +  3 O₂

First find out the Limiting Reagent,
According to equation,

         284 g (4 moles) KO₂ reacted with  =  44.8 L (2 moles) of CO₂
So,
                  27.9 g of KO₂ will react with  =  X  L of CO₂


Solving for X,
                          X  =  (44.8 L × 27.9 g) ÷ 284 g

                          X  =  4.40 L of CO₂

Hence, to consume 27.9 g of KO₂ only 4.40 L CO₂ is required, while, we are provided with 29 L of CO₂, it means CO₂ is in excess and KO₂ is is limited amount, Therefore, KO₂ will control the yield of K₂CO₃. So,

According to eq.

         284 g (4 moles) KO₂ formed  =  138.2 g of K₂CO₃
So,
         27.9 g of KO₂ will form  =  X g of K₂CO₃

Solving for X,
                        X  =  (138.2 g × 27.9 g) ÷ 284 g

                        X  =  13.57 g of K₂CO₃

So, 13.57 g of K₂CO₃ formed is the theoretical yield.

%age Yield  =  13.57 / 21.8 × 100

%age Yield  =  62.24 %
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