If you are younger than your best friend but older than another friend, do you know your absolute ages, relative ages, or both? A. relative ages only B. absolute ages only C. both relative and absolute ages

Which is a property of both alkenes and alkynes?

Which equation shows conservation of mass and energy for a reaction at 101.3 kpa and 298 k? a. 2h2 (g) + o2 (g) 2h2o (g) + 483.6 kj b. 2h2 (g) + o2 (g) 2h2o (l) + 285.8 kj c. h2 (g) + o2 (g) h2o (g) + 483.6 kj d. h2 (g) + o2 (g) h2o (l) + 285.8 kj?

Which of the following is a producer? A. a crow that consumes a dead animal on the side of a road B. a fish that eats smaller fish for its food C. a giraffe that eats the leaves of trees D. a plant that has insect larvae feeding on its roots

In a campfire, carbon from wood reacts with oxygen in a combustion reaction. If you've ever started a campfire, you know you must begin by lighting small pieces of wood (called kindling) instead of logs.

Which grouping of the three phases of bromine is listed in order from left to right for increasing distance between bromine molecules? (1) gas, liquid, solid (3) solid, gas, liquid (2) liquid, solid, gas (4) solid, liquid, gas

What is the mass of 1.0 x 10-3 mole of Zn? 3.9 x 1022 0.065 0.000015

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Sodium and chlorine can bond together. sodium gives chlorine a needed electron. what is chlorine's charge after accepting the electron?

What astronomical equiptment did hypatia use?

Name each activity or observation as either physical or chemical change. 1) Boiling water for pasta 2) Digesting food 3) Soda goes "flat" 4) Stretching a rubber band 5) Grilling a hamburger 6) Adding sugar to tea 7) Adding lemon to tea 8) Mowing the