Balancing

Chemistry

1 answer:

Kruka [31]3 years ago

5 0

2 in front of H2. Technically nothing in front of O2 otherwise put a 1 then a 2 in front of H2O

2H20 + 1O2 —— > 2H2O

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Cacl2+2AgNO3(aq)-> Ca(No3)2 (aq)+2AgCl (s) if 25.0mL of a 2.00 m CaCl2 solution is used for the reaction shown above how many

antiseptic1488 [7]

Answer:

$n_{Cl^-}=0.1molCl^-$

Explanation:

Hello,

In this case, given the 2.00 M solution, we can compute the moles of calcium chloride that reacted:

$n_{CaCl_2}=2.00\frac{mol}{L} *25.0mL*\frac{1L}{1000mL}=0.05molCaCl_2$

Then, since in one mole of calcium chloride, we find two moles of chloride ions (see subscript), we can compute the moles of chloride ions that were involved in the reaction as shown below:

$n_{Cl^-}=0.05molCaCl_2*\frac{2molCl^-}{1molCaCl_2}\\ \\n_{Cl^-}=0.1molCl^-$

Best regards.

4 0

3 years ago

Read 2 more answers

How to find pH value

yuradex [85]

Answer:

take the log of a given hydrogen ion concentration and reverse the sign.

Explanation:

6 0

3 years ago

Solid iron combines with oxygen gas to form solid iron(III) oxide. Which of the following equations best describes this reaction

Alexus [3.1K]

Answer:

B. 4 Fe + 3 0₂---> 2 Fe₂O3

Explanation:

(A) Ir + O₂--> IrO₂ No: Ir is iridium

(B) 4 Fe + 3 0₂---> 2 Fe₂O3 Yes: Fe is iron and O is oxygen, and the equation is balanced.

(D) 3 Ir + 0₂ -> 6 Ir₂03 No: I is iodine

3 0

2 years ago

0.65 moles of O2 originally at 85°C is cooled

soldier1979 [14.2K]

Answer:

2.09 atm

Explanation:

We can solve this problem by using the equation of state for an ideal gas, which relates the pressure, the volume and the temperature of an ideal gas:

$pV=nRT$