The Atomic Mass of calcium, Ca is 40.1. First we calculate the amount in moles of calcium in a 98.5g pure sample.Amount of Ca = 98.5/40.1 = 2.46mol
So there are 2.46 moles of Ca (or Ca atoms).
77.4 gCa x 1 Mole Ca/40.08 gCa = 1.931 mol Ca
801 g Ca * (1 mole Ca/40.08 g Ca) = 19.985 moles
There are about 20 moles of calcium atoms in 801 grams of calcium
0.688 grams Ca (1mole Ca/40.08 grams)(6.022 X 10^23/1 mole Ca)(1mol Ca/6.022 X 10^23)
= 0.0172 moles of calcium atoms in 0.688 grams of calcium.
84.7 grams Ca (1 mole Ca/40.08 grams)(6.022 X 10^23/1 mole Ca)
= 1.27 X 10^24 atoms of Calcium
6.022 x 10^23
40.1g Ca * 1 mole Ca/40.1g Ca * 6.02x10^23 atoms Ca/1 mole Ca = 6.02x10^23 atoms Ca.
-KG1
Calcium, Ca has atomic mass of 40.1
Amount of Ca = 77.4/40.1 = 1.93mol
There are 1.93 moles of calcium in a 77.4 gram sample.
The molar mass of Sr(OH)2 is
1.93 mol
15.3
There are 1000mm per meter. So, 985 mm = 985/1000 = 0.985m
5280 / 985 = 5.36
985 grains = about 63.826 grams.
1 lb = 16 oz 985 = 985 x 16 = 15760 oz
585+250+150=985
There are 1.609344 kilometres in one mile. Therefore, 985 miles is equal to 985 x 1.609344 = 1585.20384 kilometres.
No UFO sighting was reported in AD 985...
985
985 / 2 = 492 985 / 3 = 328 985 / 5 = 197 in all cases just round down to get your answer. if you mean how many numbers are divisible by all 3 numbers at the same time: 2x3x5 = 30 985 / 30 = 32
20% of 985 = 20% * 985 = 0.2 * 985 = 197
There are 1609.344 metres in one mile. Therefore, rounded to three decimal places, 985 metres is equal to 985/1609.344 = 0.612 miles.
985