a substance that undergoes a physical change like melting is still the same substance is it true or false

10. Hydrogen can exist as a liquid only at very low temperatures. This is primarily because the attractive forces between the molecules are A) van der Waals forces B) ionic bonds C) hydrogen bonds D) covalent forces

What kind of rocks are produced by a volcanic eruptions

What is the molarity of each ion in a solution prepared by dissolving 0.520 g of na2so4, 1.186 g of na3po4, and 0.223 g of li2so4 in water and diluting to a volume of 100.00 ml?

How many molecules are in 10.0 moles of H2O? 6.02 x 1022 molecules 6.02 x 1023 molecules 6.02 x 1024 molecules 1.8 x 1025 molecules

How many moles of aluminum in 108 grams of aluminum?

The structural level of a protein least affected by a disruption in hydrogen bonding is the

If 4.50 mol of ethane, C2H6, undergo combustion according to the unbalanced equation C2H6 + O2 CO2 + H20, how many moles of oxygen are required?

Is the O-H bond and C-O bond polar or nonpolar?

How do you find the density of copper

Which project was designed to visit the moon? A. Gemini B. Mercury C. Apollo D. Skylab