How do I calculate the molecular formula for a compound with an empirical formula CH2O and a molar mass of 90 g/mol?

What elements fill the d orbitals on the periodic table?

4. How does the change in temperature affect the speed of the molecules?

A rock from the moon contains 12.5 percent of the potassium-40 it began with. how old is the rock

A certain gas occupies a volume of 26L when the applied pressure is 5.7atm. find the pressure in the system when the gas is compressed to a volume of 6.5L at a constant temperature

Water molecules form which type of bond with other water molecules? a. disulfide bridges b. covalent bonds c. hydrogen bonds d. ionic bonds e. van der waals bonds

Which of the following statements correctly describes the relationship between fossils and rock strata? Fossils found in the rock strata are all the very small in size. Fossils are all found only in the top layers of the rock strata.

The trend for ionization energy is a general increase from left to right across a period. However, magnesium (Mg) is found to have a higher first ionization energy value than aluminum (Al).

A man is about to receive a bone marrow transplant. He is taking pills to suppress his immune system so that: A. his immune system does not attack the transplanted marrow. B. his immune system can recover after surgery. C.

Nickel (ii) chloride dissolves in water to form a light green solution. what ions are present in solution-that is, what is "swimming around" in the aqueous solution? write the formulas

Calcium sulfide forms when calcium loses 2 valence electrons to sulfur. What type of a bond is formed? Select one of the options below as your answer: A) covalent B) ionic