What is the empirical formula of a compound that contains 50.0% carbon, 6.7% hydrogen, and 43.3% oxygen by mass?

A.

CH3O

B.

C3H5O2

C.

C2H2O5

D.

C3H205

E.

C1H3O5

Sodium is an atom represented as na+. what does the "+" represent?

Would you obtain the same results if you reacted Al + FeCl2 compared to Al+FeSO4 Would you obtain the same results if you reacted Cu + FeCl2 compared to Cu+FeSO4

What are two important differences in the structures of DNA and RNA?

Element: calcium symbol: Ca Atomic weight: g Mass of one mole: g/mol

A smoke sample contains dust particles and several different gases, which have different combinations of molecules. the dust particles are suspended in the gases.

What mass of H2SO4 is contained in 60.00 mL of a 5.85 M solution of sulfuric acid

One isotope has 6 protons and 8 neutrons which reference names this isotope

When an atom that has no charge loses two electrons, it becomes a: A: positive ion. B: negative ion. C: positive isotope. D: negative isotope.

A 155.0 9 piece of copper at 182 °C Is dropped into 2500 g of water at 23.9 °C. (The specific heat of copper is 0.385 1/9°C.) Calculate the final temperature of the mixture. (Assume no heat loss to the surroundings.)

Which state of matter is characterized by having an indefinite shape, but a definite volume? Gas Liquid Solid None of the above