How long have people studied chemistry?

A. Since chemicals were discovered

B. Since fire was discovered

C. Since the atom was discovered

D. Since gravity was discovered

Is a microvilli is a tiny finger like projection that kills bacteria in the lymphatic system? true or false

12 liters of ammonia (NH3) weighs how much at room temperature and pressure (293 K and 100 kPa) ? • O A. 12 grams • O B. 0.5 grams • O C. 17 grams • O D. 8.5 grams

Define law of conservation

How does temperature affect the rate constant for a reaction? A. increasing temperature exponentially increases the rate constant B. increasing temperature linearly increases the rate constant C.

Why is electron capture accompanied by the emission of an X-ray?

How many moles are in. 12 grams of gold.

When lithium reacts with bromine to form the compound LiBr, each lithium atom: (1) gains one electron and becomes a negativelycharged ion (2) gains three electrons and becomes a negativelycharged ion (3) loses one electron and becomes a

Based on what you know about matter, explain why the food coloring mixes at different rates

What does the variable A stand for in the Arrhenius equation? A. activation energy B. frequency factor C. rate constant D. reactant concentration

Name 3 sets of elements that have been added to the periodic table since mendeleev's time