A compound has a molar mass of 90 grams per mole and the empirical formula CH2O. What is the molecular formula of this compound?

Write a balanced equation for the following by inserting the correct coefficients. KOH (aq) + Al (NO3) 3 (aq) - -->Al (OH) 3 (s) + KNO3 (aq) -

When the [H+] in a solution is 1.7 * 10-9 M, what is the pOH? 8.80 5.23 14 8.60

Which of the following represents an ion? Ca Na^+ Mg ^4He

The molar volumes of solid and liquid lead at the normal melting temperature of lead are, respectively, 18.92 and 19.47 cm3. calculate the pressure

What is the bond that forms between two ions and why does this bond form?

what is the volume of 0.98 mol oxygen (O2) gas at 275 K and a pressure of 2.0 atm? (the universal gas constant is 0.0821 L*atm/mol*K)

Which element is classified as an alkali metal? Rb Sr Zr Cl

Which statements about a neutral atom are correct? Check all that apply. The positively charged particles in the nucleus are positrons. The radius of the electron cloud is twice as large as the radius of the nucleus.

The STP conditions are ... a) 0C and 1 atm b) 0C and 760 kPa C) 0K and 1 atm d) 0K and 760 kPa

Which of these radioactive waste elements would be stored at New Mexico's Waste Isolation Pilot Plant? A) Carbon: C (atomic number 6) B) Lead: Pb (atomic number 82) C) Uranium: U (atomic number 92) D) Plutonium: Pu (atomic number 94)