Answer:
the bread rising shows that it’s baking which is a chemical reaction
Explanation:
The answer is 1s2 2s2 2p6
Answer:
The answer is D.
Explanation:
Just took the unit test and got it right.
PH is the negative logarithm of the hydrogen ion concentration (more exactly the activity), or algebraically pH = −log10 [H+] or pH= log101/[H+]. This notation was invented by Sorensen to make very small numbers fit into a more comprehensible range; thus a hydrogen ion concentration of 0.0000007 molar or 10−7M is pH 7.0. In doing so however he introduced an important peculiarity: the pH scale is exponential. Therefore, a solution at pH 6.0 contains ten-times less H+ than at pH 7.0 and a wort at pH 5.2 contains nearly four times as much H+ as a wort at pH 5.8.
Answer:2.27 g H2O
Explanation:
Step 1. Get the limiting reagent
1.24 atm of H2 would react completely with 1.24 x (1/2) = 0.62 atm of O2, but there is more O2 present than that (0.98). O2 is in excess and H2 is the limiting reactant.
If the reaction goes to completion:
(1.24 atm H2) x (2 mol H2O / 2 mol H2) = 1.24 atm H2O vapor
n = PV / RT = (1.24 atm) x (2.5 L) / ((0.08205746 L atm/K mol) x (28 + 273)K) = 0.126 mol H2O
(0.126 mol H2O) x (18.01532 g H2O/mol) = 2.27 g H2O