Radon gas has a half-life of 3.83 days. If 3.01 g of radon gas is present at time t = 0, what mass of radon will remain after 1.40 days have passed?

Calculate the enthalpy of the following reaction: 4 b (s) + 3 o2 (g) → 2 b2o3 (s) given the following pertinent information: (a) b2o3 (s) + 3 h2o (g) → 3 o2 (g) + b2h6 (g), δhoa = +2035 kj (b) 2 b (s) + 3 h2 (g) → b2h6 (g), δhob = +36 kj (c) h2 (g) + latex: \frac{1}{2} 1 2 o2 (g) → h2o (l), δhoc = −285 kj (d) h2o (l) → h2o (g), δhod = +44 kj

How many grams of n2h4 will be consumed by 23 g of n2o4

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false