How many moles of oxygen are needed to combine with 87 g of lithium according to the given equation: 4 Li + O2 - -> 2 Li2O

The main acid in the stomach is hydrochloric acid (HCl). Which chemical equations show a reaction that occurs when someone takes an antacid? Check all that apply.

An increase in the average kinetic energy of a sample of copper atomsoccurs with an increase in (1) concentration (3) pressure (2) temperature (4) volume

A small car with mass = 800 kg slows from 15 m/s to 10 m/s. What is the impulse? O A. - 150 kg-m/s O B. - 8,000 kg-m/s O O C. - 800 kg-m/s D. - 4,000 kg m/s

What is the percent concentration formula?

a chocolate chip cookie can be separated by physical means, and it is not the same throughtout. How would you classify it

Audrey is driving 50 miles in 2 hours what is her average speed?

Water has a specific heat of 4184 J / (kgK) how much energy is needed to increase the temperature os a kilogram of water 5C?

A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affect the final calculation for the δhneut of each reaction? would it be overestimated, underestimated or remain unaffected?

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

How is an animal cell related to tissue and organs