Which of the following are supported by many observations

A - hypothesis

B - laws

C - theories

What kind of matter is smoke?

Consider the following reaction: 2CH3OH - - - > 2CH4+O2 delta H = + 252.8kJ. Calculate the amount of heat transferred when 22.0g of CH3OH (g) is decomposed by this reaction at constant pressure. Include units

How many formula units are in 21.8 grams of iron (|||) dioxide

Which compound will conduct electricity when it is dissolved in water? a. CH4 b. CuSO4 c. C6H6 d. C6H12O6

When you go down the food chain by asking the question "what does it eat" at what Category of living things do you always end up Subject: mystery science chapter: food chains

Which of the following statements about monosaccharide structure is true? A) Aldoses and ketoses differ in the position of their hydroxyl groups. B) Monosaccharides can be classified according to the spatial arrangement of their atoms.

Examples of chemical and physical changes

Is when hot parts of the earth rise as cooler parts sink due to differences in density.

Distinguish between the structures of arteries, capillaries, and venies. what is the function of each.

Which phase of matter has a fixed volume but variable shape