A sample of a substance has a mass of 78.9 g and a volume of 84.3 cm3 what is the density?

What is the empiracle formula of amylose?

Matter has both physical and chemical properties and can undergo physical or chemical changes. Physical properties are those that a substance displays without changing its composition, whereas chemical properties are evident only during a chemical

Which statements accurately describe volcanic landforms? Check all that apply

A mixture of xenon and carbon dioxide gases is maintained in a 5.33 l flask at a pressure of 2.20 atm and a temperature of 67 c. if the gas mixture contains 19.3 grams of xenon the number of grams of carbon dioxide in the mixture is

How many atoms of each element are in the chemical formula NH4NO3? 1 nitrogen, 1 hydrogen, and 3 oxygen 1 nitrogen, 4 hydrogen, and 3 oxygen 2 nitrogen, 4 hydrogen, and 3 oxygen 5 nitrogen, 1 hydrogen, and 1 oxygen

A gas made up of atoms escapes through a pinhole 0.155 times as fast as h2 gas. write the chemical formula of the gas.

Calculate the mass percent composition of lithium in Li3PO4. A) 26.75 % B) 17.98 % C) 30.72 % D) 55.27 % E) 20.82 %

What is the golden rule of lighting safety?

Select the correct answer. A man pours some hot coffee into a small cup from a large jug that contains enough coffee for several cups. Which statement correctly compares the coffee in the cup and in the jug? A.

Is sponge cake a heterogeneous mixture