Chemistry and Measurements

A fish company delivers $22 \mathrm{kg}$ of salmon, $5.5 \mathrm{kg}$ of crab, and $3.48 \mathrm{kg}$ of oysters to your seafood restaurant. (2.3,2.6 )

a. What is the total mass, in kilograms, of the seafood?

b. What is the total number of pounds?

In Mexico, avocados are $48$ pesos per kilogram. What is the cost, in cents. of an avocado that weighs $0,45 lb$ if the exchange rate is $18$ pesos to the dollar? (2.6)

Bill's recipe for onion soup calls for $4.0$ lb of thinly sliced onions. If an onion has an average mass of $115 \mathrm{g}$, how many onions does Bill need? (2.6)

The price of $1\mathrm{lb}$ of potatoes is $1.75$. If all the potatoes sold today at the store bring in $\$1420$, how many kilograms of potatoes did grocery shoppers buy? (2.6)

The water level in a graduated cylinder initially at $215\mathrm{ml}$, rises to $285\mathrm{ml}$. after a piece of lead is submerged, What is the mass, in grams, of the lead (see Table 2.8)? (2.7)

A graduated cylinder contains $155 \mathrm{mL}$ of water. A $15.0 - E$ piece of iron and a $20.0-g$ piece of lead are added. What is the new water level, in milliliters, in the cylinder (see Table 2.8)(2.7)

How many milliliters of olive oil has the same mass as $1.90 \mathrm{L}$ of gasoline (see Table 2.8) ? (2,7)

The following nutrition information is listed on a box of crackers: (2.6)

Serving size $0.50$ ) 02 ( 6 crackers)

Fat $4$ g per serving; Sodium $140 mg$ per serving

a. If the box has a net weight (contents only) of $8.000$, about how many crackers are in the box?

b. If you ate $10$ crackers, how many ounces of fat did you consume?

c. How many servings of crackers in part a would it take to obtain the Daily Value (DV) for sodium, which is $2.4 \mathrm{g}$ ?

A dialysis unit requires $75000 mL$ of distilled water. How many gallons of water are needed? (2.6)

To treat a bacterial infection, a doctor orders $4$tablets of amoxicillin per day for $10$ days. If each tablet contains $250$ mg of amoxicillin, how many ounces of the medication are given in $10$ days? (2.6)

Celeste's diet restricts her intake of protein to $24 g$ per day. If she eats $1.2 oz$ of protein, has she exceeded her protein limit for the day? (2.6)

A doctor orders $5.0 \mathrm{mL}$ of phenobarbital elixir, If the phenobarbital elixir is available as $30, mg per$ $7.5\mathrm{ml}$. how many milligrams is given to the patient? (2.6)

A doctor orders $2.0$ mg of morphine. The vital of morphine on hand is $10, mg ml$. How many milliliters of morphine should you administer to the patient? (2.6)

A balance measures mass to $0.001 \mathrm{g}$. If you determine the mass of an object that weighs about $31 \mathrm{g}$, would you record the mass as $31 g, 31.1 g, 31.0 S g, 31.075 g, or 31.0750$ ? Explain your choice by writing two to three complete sentences that describe your thinking. (2.3)

When three students use the same meterstick to measure the length of a paper clip, they obtain results of $5.8 \mathrm{cm},5.75 \mathrm{cm}$. and $5.76 \mathrm{cm}$. If the meterstick has millimeter markings, what are some reasons for the different values? (2.3)

A car travels at $55 \mathrm{mi}/\mathrm{h}$ and gets $11 \mathrm{km}/\mathrm{L}$ of gasoline. How many gallons of gasoline are needed for a $3.0$-h trip? (2,6)

A $50.0$-g silver object and a $50.0$-g gold object are both added to $75.5 \mathrm{mL}$ of water contained in a graduated cylinder. What is the new water level, in milliliters, in the cylinder (see Table 2.8) ? (2.7)

A sunscreen preparation contains $2.50\sqrt{x}$ benzyl  salicylate by mass. If a tube contains $4.0$ ox of sunscreen, how many kilograms of benzyl salicylate are needed to manufacture $325$ tubes of sunscreen? (2.6)

During a workout at the gym, you set the treadmill at a pace of 55.0 m/min. How many minutes will you walk if you cover a distance of 7500ft?

How many millilitres of gasoline has a mass of 1.2 kg (see Table 2.8)? (2.7)

What is the volume, in quarts, of 3.40kg of ethanol (see Table 2.8)? (2.7)

a. An athlete with a body mass of 65kg has 3% body fat. How many pounds of body fat does that person have? (2.6)

b. In liposuction, a doctor removes fat deposits from a person's body. If body fat has a density of 0.909 g/ml and 3.0L of fat is removed, how many pounds of fat were removed from the patient?

A mouthwash is $21.6\%$ ethanol by mass. If each bottle contains $0.358 \mathrm{pt}$ of mouthwash with a density of $0.876 \mathrm{g}/\mathrm{ml}$, how many kilograms of ethanol are in $180$ bottles of the mouthwash? 

In France, grapes are $2.20 \mathrm{lb}$ per kilogram. What is the cost of grapes, in dollars per pound, if the exchange rate is $1.14 \text{dollars/euro}$.