Based on the formulas, select the compounds below that are covalent: KBr SiF4 Al2O3 CO2 NaCO3 S7O2 PCl3 Fe3N2 H2O S2F10

Balancing Equations aluminum nitrate + sodium hydroxide → aluminum hydroxide + sodium nitrate

Alison wants to record a song she wrote. The music studio records the music using digital technology instead of analog technology. Why does the music studio likely use digital technology for recording rather than analog technology? A.

A 250-gram solution of alcohol contains 180 mL of water. What is the mass percent of alcohol? (Remember water's density.)

Most of an atom's mass is contained in the what

Hydrazine (n2h4) is used as rocket fuels. it reacts with oxygen to form nitrogen and water. write the balanced equation for this reaction.

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum