Which event is endothermic?

a) the burning of a match

b) the change of water vapor to a liquid

c) the combustion of propane gas

d) the melting of ice

An experiment calls for 10.0 mL of bromine (d = 3.12 g/mL). Since an accurate balance is available, it is decided to measure the bromine by mass. How many grams should be measured out? Multiple Choice 3.21 32.1 3.12 31.2 0.312

Find the total mass of three diamonds that have masses of 14.2 grams, 8.73 grams, and 0.912 gram. A. 24 g B. 23.84 g C. 23.8 g D. 23.842 g

1. At what temperature is a gas if 0.108 moles of it are found to have a pressure of 172.6 in a 1274 cm^3 container? 2. Hydrogen gas = 0.0149 g/l, what will the pressure be at the temperature of 33.5°c? 3. If a 1.

How many moles of nitrate ions are present in exactly 275 ml of a 1.25 m copper (ii) nitrate solution, cu (no3) 2 (aq) ?

Which of the following is not used to determine your body composition? O A. Dominant gland O B. Basal metabolic rate (BMR) O O C. Body mass index (BMI) D. Body type

Which weathering process involves physical forces but not chemical reactions or dissolving of minerals

Convert 4.57X-3m to the equivalent length in nanometers

A rock falls off a cliff and hits the ground after three seconds. What is its velocity right before it hits the ground? 9.8 m/s 0.31 m/s 29.4 m/s 3.3 m/s

Which compound is an isomer of pentane? (1) butane (3) methyl butane (2) propane (4) methyl propane

Which of the following has primary responsibility for eliminating alcohol from the bloodstream