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Zolol [24]
3 years ago
6

Noah added yeast and sugar to lukewarm water and placed it in a flask. He stretched a balloon over the opening of the flask. Aft

er several minutes, he noticed small bubbles rising along the side of the flask as the balloon slowly began to inflate. Noah concluded that —
Chemistry
1 answer:
Tasya [4]3 years ago
7 0

Answer:

There was a chemical reaction

Explanation:

there was bubbles on the side of the flask

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A cell has a standard emf of + 0.135 v at 298 k. part a what is the value of the equilibrium constant for the cell reaction if n
Irina-Kira [14]
To look for the value of the equilibrium constant for the cell where n=1, it is computed by:
Eo = RT / nF * ln(K) 
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(0.135 * 1mol* e- * 9.65E4C/mol*e) / (8.314J / molK * 298K) = ln(K) 
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A sample in the lab is found to contain 0.450 g magnesium and 2.95 g bromine. what is the empirical formula of the sample?
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We need to find the number of moles that each of the given substances. The molar mass of magnesium is 24.3 g/mol and Bromine has a molar mass of 79.90 g/mol. From the given mass of each species, the moles of Mg and Br are 0.018 and 0.369 respectively. There are 2 Br in one Mg. The sample is MgBr2. 
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g

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