Select the correct mass for each of the samples described below. 3.01 × 1023 molecules H2O

8.32 × 1020 formula units CaBr2

1.93 × 1026 molecules XeF6

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?