CHEMISTRY
HIGH SCHOOL

Answer: I think it’s Carbon-14 dating

Answer:

Answer:

carbon-12carbon-14
HIGH SCHOOL

How many grams of ethane gas (C2H6) are in a 12.7 liter sample at 1.6 atmospheres and 24°C? Show all work used to solve this problem.

For this problem, we assume that ethane gas is an ideal gas so we can use the ideal gas equation which is expressed as:

PV = nRT

We first find the number of moles using the above equation.

n = PV / RT

n = (1.6 atm) (12.7 L) / (0.08206 L atm/mol K) (24 + 273.15 K)

n = 0.83 mol C2H6

M = 0.83 mol C2H6 ( 30.08 g / 1 mol ) = 2.97 g C2H6

PV = nRT

We first find the number of moles using the above equation.

n = PV / RT

n = (1.6 atm) (12.7 L) / (0.08206 L atm/mol K) (24 + 273.15 K)

n = 0.83 mol C2H6

M = 0.83 mol C2H6 ( 30.08 g / 1 mol ) = 2.97 g C2H6

MIDDLE SCHOOL

What is the chemical balance of C4H10+O2-CO2+H2O

Answer: 2 C4H10 + 13 O2 => 8 CO2 + 10 H2O

Explanation: The equation is now balanced. There is an equal amount of atoms on each element in the reactant and product side.

MIDDLE SCHOOL

Is a sugar cube dissolved in water a pure substance or mixture? Explain.

A mixture because the sugar and water molecules remain as sugar and water

MIDDLE SCHOOL

In the unit 2 lab, what combination produced a brown bubbly liquid that looks like root-beer? (Select the two parts of the combination) Chalk

NaCl

KCl

Baking Soda

Sugar

Vinegar

Water

Citric Acid

Vegetable Oil

NaOH

Baking soda and maybe Citric acid or Vegetable oil