11. What is the mass number

of an element if its atom

contains 10 protons, 10

electron, and 12 neutrons?

A 12

C20

D. 32

Which part of the nervous system includes the brain and spinal cord? nervous system

NaCl + AgNO3 - > AgCl + NaNO3 How much AgNO3 is consumed during the reaction with 78 g of NaCl?

If the temperature of a 1.75 liter sample of gas is changed from 30.0°c to 20.0°c at constant pressure, what will be the new volume? question 3 options:

Where the use of energy is concerned (in scientific sense), when is work done?

A 3.60-g sample of a salt dissolves in 7.70 g of water to give a saturated solution at 21°C. What is the solubility (in g salt/100 g of H2O) of the salt?

Use the unbalanced equation NH3+O2--> NO+H2O to find the mole ratio between NH3 ad O2

Explică rolul chimiei în protejarea mediului înconjurător?

A sample of neon gas has a volume of 2.85 L and a temperature of 15 °C, under a constant pressure. What is the new temperature (in °C), if the volume is decreased to 1.45 L?

Which type of chemical reaction occurs in Ca+CI2 CaCI2

Which of the following organisms are carnivores? Producers Omnivores Consumers Decomposers