5. Which of the following best describes an atomic number? An element's identity is defined by its number of
O A. protons plus neutrons in its nucleus.
O B. protons in its nucleus.
O C. electrons in the element.
O D. neutrons in its nucleus.

A+b→2c when the reaction begins, the researcher records that the rate of reaction is such that 1 mole of a is consumed per minute. after making changes to the reaction, the researcher notes that 2 moles of a are consumed per minute. what change could the researcher have made to effect this change?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest