Can I Plz Have help?!?!?!? (Q1) What is the correct value for coefficient (A)?

A. 1

B. 2

C. 3

D. 4

(Q2) What is the correct value for coefficient (B)?

A. 1

B. 2

C. 3

D. 4

(Q3) What is the correct value for coefficient (C)?

A. 1

B. 2

C. 3

D. 4

(Q4)What is the correct value for coefficient (D)?

A. 1

B. 2

C. 3

D. 4

(Q5) If there is enough energy and H2, then how many moles of Sn02 will react with 2 moles of H2 and produce 1 mole of Sn and 2 moles of H2O? How many moles of SnO2 does this balanced equation represent?

A. 0.5

B. 1.0

C. 1.5

D. 2.5

(Q6)The reactants in this equation are _.

A. SnO2 and Sn

B. Sn and H2O

C. SnO2 and H2

D. H2 and H2O

(Q7)The products in this equation are _.

A. SnO2 and Sn

B. Sn and H2O

C. SnO2 and H2

D. H2 and H2O

(Q8)This reaction is _.

A. endothermic

B. exothermic

1. A

2. B

3. A

4. B

5. B

6.C

7. B

8. A

Explanation:

SnO₂ + H₂ + energy → Sn + H₂0

The reaction is between Tin(iv) oxide and hydrogen gas to form tin and water molecules.

Notice the reaction is not balance therefore let us balance the equation. To balance the equation the number of atoms on both side (reactant and product)of the equation must be equal.

SnO₂ +2H₂ → Sn + 2H₂0

The equation is balanced .  SnO₂  has coefficient of 1 , H₂ has coefficient of 2, Sn has coefficient of 1 and H₂0 has coefficient of 2.

Q5

SnO₂ + 2H₂→ Sn + 2H₂0

1 moles of SnO₂ will balance the equation

Q6

The reactant is on the left side of the chemical equation. Therefore the reactants are Tin(iv) oxide and hydrogen molecules (SnO₂ and H₂)

Q7

The product is on the right side of the chemical equations .Therefore, the products are Tin and water molecules(Sn and H₂0).

Q8

The reaction is an endothermic reaction because it absorb heat from it environment.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.