Complete the following table. Round each of your answers to 3 significant digits. energy content when eaten food cal kcal kJ 4 a kiwi fruit 4.50 X 10 a cup of cooked white rice 225. 356. an ear of cooked corn

8.42×104 J  to Cal Express the value in Calories to three significant figures, please.

O MEASUREMENT Adding or subtracting and multiplying or dividing measurements 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: 1.5 g • She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 36.669 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 37.11 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 Explanation -1 Check 99+ 0/5 VUDU © 2023 McGraw Hill LLC. All Rights…

Convert the following measurement. -5 kg, g 7.6 x 10 x10 mol-dL mol·L X

Consider the two spheres shown here, one made of silver and the other of aluminum. The spheres are dropped from a height of 1.7 m. Composition - aluminum Density= 2.70 g/cm³ Volume 196 cm³ Composition - silver Density 10.49 g/cm³ Volume=196 cm³ What is the kinetic energy of the silver sphere at the moment it hits the ground? (Assume that energy is conserved during the fall and that 100%% of the sphere's initial potential energy is converted to kinetic energy the time impact occurs.) Express your answer to two significant figures and include the appropriate units. Ek = Value Units

Mass of Calorimeter (g) Mass of Calorimeter + Cold Water (g) Mass of Cold Water (g) (A2- A1) Temperature of Cold Water (°c Temperature of Hot Water (°C) Final Temperature of Water (°C) A1: 52.7 A2: 107.7 21.4 44.3 30.1 Mass of Calorimeter + Cold Water + Hot A3: 215.1 Water (g) Mass of Hot Water (g) (A3 – A2) Determine the heat capacity of the calorimeter. (Remember C, = 4.18 Jg1 °C)

Automobiles are often implicated as contributors to global warming because they are a source of the greenhouse gas CO2. How many pounds of CO2 would your car release in a year if it was driven 110. miles per week? Gasoline is a complex mixture of hydrocarbons. In your calculations, assume that gasoline is octane (molecular formula C8H18) and that it is burned completely to CO2 and H2O in the engine of your car. Also assume that the car averages 27.3 miles per gallon and that the density of octane is 0.703 g cm-3.

For the reaction 2A(g) s B(g) K. = 69 For the reaction A(g) = ½ B(g) Kc = For the reaction ½ B(g) A(g) Kc = Report each answer to two significant figures. Do NOT use scientific notation.

What steps do I take to convert .00368 x 103 kJ to microJ?

A solution of 5.00% glucose (C6,H12,O6) solution is used in many medical settings. If you are given 75.0 g of this solution, how many grams of glucose did you receive? Write the value to the correct significant figures.