jaki9
07.10.2019 •
Mathematics
What is the equation of the graphed line in point-slope form?
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Ответ:
the first option
Step-by-step explanation:
the actual equation is y=2x+3 fully simplified and y + 3=2(x + 3) simplifies to y=2x+3 take y + 3=2(x + 3) distribute the 2 to make y + 3=2x+6 then subtract 3 from both sides to make y=2x+3
Ответ:
There are 0.16 g of sulphur in 3.0 × 10²¹ atoms.
Explanation:
One mole of a substance contains 6.02 × 10²³ particles
One mole of sulphur atom contains 6.02 × 10²³ atoms
Number of moles of sulphur present in 3.0 × 10²¹ atoms = 3.0 ×10²¹/6.02 10²³
Number of moles of sulphur atom = 0.00498 moles of sulphur atom
The mole of a substance is related to its mass by a quantity known as molar mass which is defined as the mass of one mole of that substance.
Molar mass of sulphur atom = 32 grams per mole (g/mol)
Mass of 0.00498 moles of sulphur atom = 0.00498 moles × 32 g/mol
Mass of sulphur = 0.16 g
Therefore, there are 0.16 g of sulphur in 3.0 × 10²¹ atoms.