Question 6 (1 point) A highway engineer is researching de-icing compounds for clearing ice from streets in winter. She wants a
compound that has +2 ions and 1 ions in it. Which would work?
aluminum combined with sulfur
potassium combined with iodine
magnesium combined with chlorine
silicon combined with oxygen
Question 7 (1 point)
When CaCl, dissolves in water, which is true?
GIVING BRAINLIEST HELP ASAP

See explanation

Explanation:

The balanced reaction equation is;

2CH3OH + 302 --> 2C02 + 4H20

Number of moles of of methanol = 6.40g/32.04 g/mol= 0.1998 moles

2 moles of methanol yields 2 moles of CO2

0.1998 moles of methanol also yields 0.1998 moles of CO2

Number of moles of oxygen = 10.2g/32g/mol = 0.3188 moles

3 moles of oxygen yields 2 moles of CO2

0.3188 moles of oxygen yields 0.3188 × 2/3= 0.2125 moles of CO2

Hence, methanol is the limiting reactant

Mass of CO2 produced = 0.1998 moles of CO2 × 44g/mol = 8.79g

Theoretical yield = 8.79g

%yield = actual yield/theoretical yield × 100

% yield = 6.12/8.79 × 100

%yield = 69.6%