He improved and followed from the works of Luigi Galvani, which used a 'frog galvanoscope' as a prototype of measuring current. He recognized that a compass could actually measure current, given that it is placed near coil of wire.
Glycerol will react with 3 butanoic acid molecule to produce glyceryl tributyrate.
Explanation:
You may find the chemical reaction and the structure of molecules in the attached picture.
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Answer:
Answers are given below.
Explanation:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1) 0.680 moles of H₂S
0.680 mol × 6.022 × 10²³ molecules / 1mol
4.09× 10²³ molecules
2) 8.96 moles of KI
8.96 mol × 6.022 × 10²³ molecules / 1mol
53.96 × 10²³ molecules
3) 6.500 moles of KClO
6.500 mol × 6.022 × 10²³ molecules / 1mol
39.143 × 10²³ molecules
4) 0.950 moles of NaOH
0.950 mol × 6.022 × 10²³ molecules / 1mol
5.721 × 10²³ molecules
5) 4.73 moles of Na₂CO₃
4.73 mol × 6.022 × 10²³ molecules / 1mol
28.48 × 10²³ molecules
From one mole of MnWO4, we get one mole of tungsten. Therefore 10.88 mol of tungsten will be obtained from 10.88 mol of MnWO4.
Molar mass MnWO4 = 54.94 + 183.84 + 4(16.0) = 302.78 g.mol-1
Therefore mass of MnWO4 required = mole x molar mass = 10.88 mol x 302.78 g.mol-1 = 3294.24 grams
And, 3294.24 grams = > 3.29424 kg
On rounding off to two significant digits, we get 3.3 kg.
Rounds a number to 3 significant digits the same way it rounds to 3 decimal places. Count up to 3 digits from the first non-zero digit. Then round off the last digit. Pad the remaining digits to the right of the decimal point with zeros. 0.0560 has 3 significant digits. In accordance with scientific conventions, leading zeros in decimal numbers are not treated as significant. So exclude 0.0 from 0.0560.
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The answer to that is: F A L SE
