Question

Помогите пожалуйста Поставьте вместо знаков вопроса пропущенные формулы и уравняйте реакции: a) P+? → P₂O5; 6) ? + Cl2 → AlCl3; B) C+? → CO₂; г) ? + O2 → MgO

Answer 1

а) 4 P + 5 O2 = 2 P2O5

б) 2 Al + 3 Cl2 = 2 AlCl3

в) C + O2 = CO2

г) 2 Mg + O2 = 2 MgO

Answer 2

a)2O

6)Al

B)O2

г)mg

......

Answer 3

a) P ? → P₂O₅

To balance the equation, we need to ensure that the number of each type of atom is the same on both sides of the equation.

The unbalanced equation is:

P ? → P₂O₅

First, let's balance the phosphorus (P) atoms. There is only one phosphorus atom on the left side, so we need to put a 4 in front of the P₂O₅ on the right side to balance the equation:

P + O₂ → P₂O₅

Next, let's balance the oxygen (O) atoms. There are 5 oxygen atoms on the right side, so we need to put a 5/2 coefficient in front of the O₂ on the left side to balance the equation:

P + (5/2) O₂ → P₂O₅

To simplify the coefficients, we can multiply the entire equation by 2 to get rid of the fractional coefficient:

2P + 5O₂ → 2P₂O₅

So, the balanced equation is:

2P + 5O₂ → 2P₂O₅

b) Cl₂ + ? → AlCl₃

To balance the equation, we need to ensure that the number of each type of atom is the same on both sides of the equation.

The unbalanced equation is:

Cl₂ + ? → AlCl₃

First, let's balance the chlorine (Cl) atoms. There are two chlorine atoms on the left side, so we need to put a 2 in front of the AlCl₃ on the right side to balance the equation:

Cl₂ + ? → 2AlCl₃

Now, let's balance the aluminum (Al) atoms. There are already two aluminum atoms on the right side, so we don't need to change anything.

So, the balanced equation is:

Cl₂ + ? → 2AlCl₃

c) C ? → CO₂

To balance the equation, we need to ensure that the number of each type of atom is the same on both sides of the equation.

The unbalanced equation is:

C ? → CO₂

There is one carbon atom on the left side, so we need to put a 1 in front of the CO₂ on the right side to balance the equation:

C + O₂ → CO₂

So, the balanced equation is:

C + O₂ → CO₂

г) ? + O₂ → MgO

To balance the equation, we need to ensure that the number of each type of atom is the same on both sides of the equation.

The unbalanced equation is:

? + O₂ → MgO

There is one magnesium atom on the right side, so we need to put a 1 in front of the MgO on the right side to balance the equation:

? + O₂ → 1MgO

Next, let's balance the oxygen (O) atoms. There are two oxygen atoms on the right side, so we need to put a 2 in front of the O₂ on the left side to balance the equation:

? + 2O₂ → 1MgO

So, the balanced equation is:

? + 2O₂ → MgO