Respuesta :

Edufirst

Answer:

  • 193 g

Explanation:

The mass percent of a component in a mixture is the mass of the component divided by the total mass of mixture multipled by 100.

  • % of component A = (mass of component A / mass of mixture) × 100

Substitute and solve for the mass of carbon:

  • 74.13 = (mass of carbon / 260 g of sample) × 100

  • 74.13 × 260.g / 100 = mass of carbon

  • Mass of carbon = 193g (rounded to 3 significant figures)

Answer: 176 g

Explanation:

Background

Units part/ Units total (100)

240g x (73.14g / 100g)

240 x 73.14 = 17553.6 /100 = 175.536

There are only three sig figs so you must round to three. Getting 176.

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