A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together. (0.050)-5 8 cm ロ･ロ X H 0° Ś

A chemist adds 525.0 mL of a 0.00153 g/L magnesium fluoride (MgF₂) solution to a flask. Calculate the mass in milligrams of magnesium fluoride the chemist has added to the flask. Be sure your answer has the correct number of significant digits. mg x10 X Ś

Measurement and Matter Adding or subtracting and multiplying or dividing measurements 1/3 B A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: The label on the graduated cylinder says: empty weight: 7.2 g . She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 63.517 g. . She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 91.0 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. g-mL G

You are on a road trip. Your car travels at an average speed of 65 miles/hr, with an average gas use of 17.8 km/L.       1 liter = 1,000 mL = 0.264 gallons. 1 km = 0.621 miles.  1) If your trip takes 2.6 hours, determine how many total liters and gallons of gasoline are used on this trip. 2) How many mL (milliliters) of gasoline are used by the car each minute during this trip? 3) The density of the gasoline used on your trip is 0.755 g/mL. What is the total mass in grams, and in ounces of the gasoline used on your trip?

Ethanol has a density of 0.789 g cm‐3. Calculate the volume in mL that must be poured into a measuring cylinder to give 19.8 g of ethanol. Note 1 mL = 1 cm3.

A chemist prepares a solution of calcium bromide (CaBr₂) by measuring out 0.599 kg of calcium bromide into a 400. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's calcium bromide solution. Be sure your answer has the correct number of significant digits. e mol/L Xx 扁 ol

Earth's oceans have an average depth of 3800 m, a total area of 3.63 x 10 km², and an average concentration of dissolved gold of 5.8 × 10. If a recent $987.00 troy oz what is the value of gold in the oceans? (I troy oz 31.1 g) Round your answer to 2 significant figures. Note: Reference the SI prefixes and Unit conversions for derived SI units tables for additional information. price of gold was 0

A student sets up the following equation to convert a measurement. (The  ?  stands for a number the student is going to calculate.)   Fill in the missing part of this equa

A chemistry student weighs out 0.0960 g of phosphoric acid (H,PO4), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1100 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. |mL ola х10 Ar

A A chemistry student weighs out 0.130 g of phosphoric acid (H,PO,), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. mL x10