Chemistry Ch 1

A bottle of cough syrup contains 500 mL. How many bottles of cough syrup should a mother buy if each of her 3 kids is prescribed 2 tsp of cough syrup every 4 hours for 5 days (5 mL = 1 tsp)?

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Children's Tylenol contains 32 mg of acetaminophen per milliliter of liquid. The recommended dose of this medicine for a 23kg child is 2 tsp. How many milligrams of acetaminophen should be given to a child who weighs 100 pounds? 2.20 lb = 1 kg 1 tsp = 5mL

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The doctor orders 1000 mL D5W@ 32 gtts/min. You have an IV tube that delivers 15 gtts/cc. How many hours will it take for the 1000 cc bottle to infuse?

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The doctor orders 900 units/hr of Heparin. There are 25,000 units of Heparin in 250 mL of D5W. How many ml/hr should the IV pump be set at?

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The doctor orders a patient to have 1.5 mg of Decadron. You have 0.75mg Decadron/tablet. How many tablets do you give the patient?

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How many kilograms are there in 8.89 grams?

.00889 check in class

How many kilograms are in 23000 mg?

.02300 check in class

The doctor orders Methozamine HCl 0.015 gram. You have Methozamine HCl 10 mg/mL. How many mL of the drug do you give the patient?

.15mL

The doctor orders 125 mg Dicloxacillin. You have Dicloxacillin 6.25mg/5mL. How many mL of the drug do you give the patient?

100mL

groups: 1A, 2A, 7A, and 8A. what are group Bs what is a period

1A alkaline metals 2A alkaline earth metals, 7A the halogens, 8A the noble gases B- transitional elements period- horizontal blocks

1 cc (cubic centimeters)=

1cc=1mL

A bottle of cough syrup lists the recommended adult dosage as 1.5 tablespoons. Convert this dosage into milliliters. (1 tbsp = 15 mL)

22.5ml

Stavudine is an antiviral drug that has been tested as a treatment for AIDS. The daily recommended dosage is 1.0 mg/kg of body weight. How many grams of the drug should be administered to a 150 lb patient? (1 kg = 2.20 lb)

68180 kg

Calculate the number of meters in 8.55 kilometers.

8550

A chemical equation

A chemical equation is the chemist's way of writing a sentence about what happens in a chemical reaction. Charcoal burns in oxygen to produce carbon dioxide.

chemical reaction

A chemical reaction results in a change in the chemical identity of the substance or substances involved (ex. Baking a cake, digestion, burning charcoal).

decimal to percent

A decimal number can be converted to a percent by multiplying by 100 and adding a percent sign.

fraction to percent

A fraction can be converted to a percent by dividing the numerator by the denominator, multiplying by 100, and adding a percent sign.

physical change

A physical change results in a change in the form of matter, but its identity remains unchanged.

Sig Figs (Lab Only)

All nonzero digits are significant - 9.897 Zeros between non digits are significant - 1.002 Zeros at the beginning of a number are never significant - 0.02 Zeros at the end of a number that contains a decimal point are always significant - 2.000

classify the following: H20 hydrogen kool aide sand water

H20 compound hydrogen element kool aide homogenious mixture sand water heterogenious mixture

metric unit conversion acronym

Kilo, Hecto, Deka, Meter, Deci, Centi, Milli. King henry drank (base) delicious chocolate milk (micro) (nano)

Matter categories and subcategories

Matter has 2 categories 1. Pure substance a) element b) compounds 2. Mixtures a) Homogeneous (uniform same throughout) b) Heterogeneous (not uniform throughout)

Addition and Subtraction

The answer is given to the same number of decimal places as the term with the fewest decimal places

sig fig rules for multiplication and division

The answer should have the same number of sig figs as there are in the number with the fewest sig figs

law of conservation of mass.

The number of each reactant element equals the number of each element in the products. This illustrates the law of conservation of mass. For any chemical equation, the number of each element or compound must be the same on both sides of the equation. We can balance chemical equations when necessary by adding a number, called a coefficient, in front of the chemical formula for a substance in the chemical equation.

zero is not signigicant if

at the beginning of a decimal number and end of a number that doesn't have a decimal point

Density (d)

d=m/V less dense object floats, can use density as conversion factor because it does not change

Solid

definite shape and volume - particles packed close

Periodic table- groups

groups vertical column bloacks

Gas

no definite shape or volume - particles are disordered and rapidly moving

Liquid

no definite shape, definite volume - particles are less ordered and move about freely

percent equation

percent= part/whole x100

0.0098 2,000 500. 0.050

what is the number of sig figs