the one that starts with (-2,-2)
Answer:
Amount of NaCl = 23.376 gram
Step-by-step explanation:
Given:
Molarity = 4M
Volume of solution = 100 ml
Find:
Amount of NaCl
Computation:
Molar mass of Na = 22.99 g/mole
Molar mass of Cl = 35.45 g/mole
Molar mass of NaCl = 22.99 + 35.45
Molar mass of NaCl = 58.44 g/mole
Molarity = [moles of solute / volume of solute(ml)]1,000
4 = [moles of solute / 100]1000
Moles of solute = 0.4
moles of solute = Mass of solute / molar mass
0.4 = Amount of NaCl / 58.44
Amount of NaCl = 23.376 gram
20/32 10/16 5/8 The simplest way is to just half each number
Answer:
Step-by-step explanation:
a² - b² = (a +b)(a - b)
a = 525 & b = 475
525² - 475² = (525 + 475) (525 - 475)
=1000 * 50
= 50,000
