What type of reaction absorbs heat from the surrounding environment?

A. Endothermic

B. Exothermic

C. Heterothermic

D. Homothermic

how many grams of solid lithium must be added to liquid after in order to obtain 15.0 L of hydrogen gas at STP?

Which statement best describes an ionic bond? A. An ionic bond involves a metal that transfers one or more electrons to a nonmetal B. An ionic bond involves two metals that exchange electrons C.

Sand is more likely than shale to preserve fossils. True False

Which correctly defines a basic solution? a. [H+] is not present. b. [H+] is equal to [OH-]. c. [H+] is less than [OH-]. d. [H+] is greater than [OH-].

Combustion analysis of 0.300 g of an unknown compound containing carbon, hydrogen, and oxygen produced 0.5213 g of co2 and 0.2835 g of h2o. what is the empirical formula of the compound?

The elements selenium and oxygen are both poor electrical conductors in which section of the periodic table are they found

What is the mole ratio of NaOH to Al (OH) 3

What is Atomic mass A: the mass of the atom based on the mass of an atom of oxygen-16 B: the mass of an atom based on the mass of an atom of carbon-12 c: the average mass of all isotopes d: the mass of the atom based on the mass of an atom of

What are the top 2 risk Maryland faces due to climate change

Which atom has the weakest attraction for electrons in a chemical bond? (1) a boron atom (3) a fluorine atom (2) a calcium atom (4) a nitrogen atom