If a substance cannot be seperated physically or chemically, it is?

Why did Rutherford conclude that the atom was mostly empty space?

Two different ionic compounds each contain only copper and chlorine. Both compounds are powders, one white and one brown. An elemental analysis is performed on each powder.

72.983 rounded to 2 significant figures

If i rub a balloon on a piece of paper then hold it against my head my hair will stand up why is that?

The gas left in a ussd aerosol can is at a pressure of 103kPa at 25.0 °C. if the can heats up to 50.0°C what is the pressure of gas inside the can assuming the volume of the can is constant

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?

For the complete combustion of 5.6dm3 of a gaseuos hydrocarbon CxHy. 28.0dm3 of oxygen gas were used, 16.8dm3 of CO2 gas and 18.0gof liquid water were produced all gases measurement were made at stp. Determine the chemical formula of the hydrocarbon

What kind or plate tectonic boundary is the san anfreas fault?

What is it called when the state of matter that keeps its shape and volume when it's placed in a different container