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Alexxx [7]
4 years ago
14

You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred

- true or false
explain you answer stating facts that support your answer.

Chemistry
1 answer:
NeX [460]4 years ago
4 0

Answer:

False

Explanation:

It is not a chemical change, it is a physical change because the molecules of the bread didn't  change, the form of the bread did

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If 22.99 g of sodium and 35.45 g of chlorine fully react, how much sodium chloride forms?​
matrenka [14]

Answer:

The answer to your question is: HCl = 58.44 g

Explanation:

To solve this problem, we must remember the law of conservation of mass that says that, matter cannot be created or destroyed, only changes its form.

That means that, the mass of the reactants must be equal to the mass of the products.

               Process

                    Sodium (Na)  +    Chlorine (Cl)   ⇒     Sodium chloride (HCl)

                         22.99 g              35.45 g                            x

              22.99 + 35.45 = HCl

              HCl = 58.44 g

3 0
3 years ago
Write a balanced net ionic equation showing only the particles involved in the reaction and balancing the charges.Pb(s) AgNO3aq)
Alexus [3.1K]

Answer:

Pb(s) + 2Ag+(aq) → 2Ag(s) + Pb2+(aq)

Explanation:

Step 1: The unbalanced equation

Pb(s) + AgNO3aq) → Ag(s) + Pb(NO3)2(aq)

Step 2: Balancing the equation

Pb(s) + AgNO3aq) → Ag(s) + Pb(NO3)2(aq)

On the right side we have 2x NO3, on the left side we have 1x NO3.

To balance the amount of NO3 on both sides, we have to multiply AgNO3 (on the left side) by 2.

Pb(s) + 2AgNO3aq) → Ag(s) + Pb(NO3)2(aq)

On the left side we have 2x Ag, on the right side we have 1x Ag.

To balance the amount of Ag on both sides, we have to multiply Ag (on the right side) by 2. Now the equation is balanced.

Pb(s) + 2AgNO3(aq) → 2Ag(s) + Pb(NO3)2(aq)

The net ionic equation, for which spectator ions are omitted - remember that spectator ions are those ions located on both sides of the equation - will look like this

Pb(s) + 2Ag+(aq) → 2Ag(s) + Pb2+

8 0
4 years ago
What are the chemical symbols for the elements calcium, carbon, and chlorine respectively? es
laiz [17]
The answer is letter c
7 0
3 years ago
Empirical formula for C2H6O4
Charra [1.4K]

Empirical formula would be CH3O2. This is the multiple that can be multiplied by any number to get a molecule.

8 0
4 years ago
_____ resources are resources that cannot be replenished within a lifetime.
77julia77 [94]

Answer:

Non Renewable would be correct option

Explanation:

<u>Non </u><u>Renewable</u> resources are resources that cannot be replenished within a lifetime.

These resources cannot be replaced after once used.

Examples of Non Renewable resources are Coal , Petroleum & gas etc .

4 0
3 years ago
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