Which of the following indicates that an exothermic reaction has taken place?

A. a change in color

B. release of heat and/or light energy

C. cooling of the surroundings

D. absorption of heat by the reaction ... ?

The density of carbon tetracoride is 1.58 g/mL. What is the mass of 95.7 mL of carbon tetrachloride?

Is petrolatum ionic or covalent

Which of the following most likely happens when astronauts go to space? 1. Their heart rate speeds up because the blood vessels have less blood to circulate. 2. Their heart rate speeds up because the blood vessels have more blood to circulate. 3.

Match each base with its common use. 1. magnesium hydroxide A. laxative 2. sodium hydroxide B. soap 3. calcium hydroxide C. plaster 4. aluminum hydroxide D. deodorants 5. ammonium hydroxide E. household cleaner

What does the arow mean in a chemical equation

Which is the molar mass of BF3?

Mg3 (Si2O5) 2 (OH) 2 There are. 0893 moles of magnesium how many moles of silicon are there in the sample?

The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change? It increases by a factor of two. It increases by a factor of eight. It decreases by a factor of eight.

Write the complete balanced equation for the decomposition of sodium chloride (NaCl)

What is the term for the different phases water can take?