Which is true of chemicals?

A. Things containing chemicals always cost a lot of money.

B. Chemicals are never dangerous.

c. Chemicals are in many substances in a home.

D. Chemicals are rarely found on Earth.

Is it correct to say that dissolving a packet of juice powder in water makes a new substance, fruit punch, so it must not be a physical change?

An element's identity can be determined from its

What elements are being fused in a main sequence star?

Explain why boats made of iron are able to float. The density of iron is 7.86x10^3 g/L

As you move left to right across a period, which of the following always increases

Which of the following compounds is the most soluble in water? a) propanoic acid b) propane c) propanal d) l-bromopropane

What mass of solid Na2CO3 is required to make 250.0mL of a 0.125M solution of Na2CO3?

The atomic mass of carbon is 12.011 g/mol. how many atoms of carbon have that exact mass? why?

Which option is true about the effect of polarity on solubility? Select all that apply. Polar solutes dissolve better in water than in oil. Polar solutes have the greatest solubility in nonpolar solvents.

Which change results in a release of energy? 1. The melting of H₂O (S) 2. The boiling of water (L) 3. The evaporation of H₂0 (L) 4. The condensation of H₂0 (G)