The digestive system changes the food we eat into usable materials go until disposal

The volume of carbon dioxide, CO2, gas created in the reaction below at STP occupies 66 L. How many kilojoules are released in the reaction that produces this quantity of CO2? HCl (aq) + NaHCO3 (s) → H2O (l) + NaCl (s) + CO2 (g) + 70kJ

van der Waals bonding can be important to the modulus of which of the following? Select one: a. metals only b. some polymers c. ceramics only d. hydrogen bonded materials e. metals and polymers

Radiation is the most penetrating type of radiation

Which response includes all the following that are properties of most metals, and no other properties? Z1) They tend to form cations. Z2) They have high first ionization energies. Z3) They have outer electronic shells that are more than half-filled.

How would you use density to identify an unknown substance?

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume

Which of the following statements about igneous rocks is correct A. intrusive igneous rocks are formed when magma is called above the ground. B. Extrusive igneous rocks are formed when magma is cooled above the ground C.

The compound KOH is called

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?