# How do you calculate the percent composition of lactose, #C_12H_22O_11#?

You add up the masses of all the atoms, and then you calculate the percentage of each element.

The molecular mass of lactose can be determined using the formula below:

Each element's mass percentage is as follows:

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The molar mass of lactose (C12H22O11) is equal to 12 * the molar mass of carbon + 22 * the molar mass of hydrogen + 11 * the molar mass of oxygen. Next, calculate the percent composition of each element: - Percent composition of carbon = 12 * the molar mass of carbon / (molar mass of lactose) * 100 - Percent composition of hydrogen = (22 * the molar mass of hydrogen) / (molar mass of lactose) * 100 - Percent composition of oxygen = (11 * molar mass of oxygen) / (molar mass of lactose) * 100

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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