How many atoms are in 0.075 mol of helium

When zinc is exposed to air, zinc oxide is produce. What happens in this reaction

What is the salute and sweetened iced tea

The temperature of a 500 ml sample of gas increases from 150 k to 300 k. what is the final volume of the sample of gas, if the pressure in the container is kept constant?

Discuss the environmental problems caused by the combustion of fossil fuels (a few lines only)

An ideal gas is one that a gas whose particles exhibit no attractive interactions whatsoever a gas whose particles exhibit strong attractive interactions a gas whose particles exhibit behaviors that closely resemble hydrogen a gas whose particles

In a titration 25.0 ml of a. 20 M NaOH solution is used to neutralize 10.0 ml of HCl. Write the equation for this neutralization reaction and calculate the molarity of the acid.

4*C: 4cm 8*C: 10cm 12*C: 14cm 16*C: 18cm 20*C:24cm 24*C: 12cm what is the independent variable, dependent variable and three constant variables?

In the chemical laboratory, why do scientists use a mortar and pestle? a. to increase surface area of a solute b. to decrease surface area of a solute c. to increase temperature of a solute d. to decrease temperature of a solute

Is a mixture being separated into two elements a chemical change

Which electrons are lost by an atom of iron when it forms the Fe3 + ion? A. One s orbital electron and two d orbital electrons B. Two s orbital electrons and one d orbital electron C. Three s orbital electrons D. Three d orbital electrons