Answer:
False
Explanation:
No matter if something happened in the past year or so, it still should be included for safety reasons so it wont happen again
Answer:
Option D
Explanation:
As we know
Gravitational Constant (G) 
Mass of Earth (M) 
Weight of satellite (m) 
Kg
Radius of Earth (R) = 
Distance of satellite from Earth = 
Substituting the given values, we get
Km
or 635 m
The correct answer is option D
Answer:
58.44 g/mol The Molarity of this concentration is 0.154 molar
Explanation:
the molar mass of NaCl is 58.44 g/mol,
0.9 % is the same thing as 0.9g of NaCl , so this means that 100 ml's of physiological saline contains 0.9 g of NaCl. One liter of physiological saline must contain 9 g of NaCl. We can determine the molarity of a physiological saline solution by dividing 9 g by 58 g... since we have 9 g of NaCl in a liter of physiological saline, but we have 58 grams of NaCl in a mole of NaCl. When we divide 9 g by 58 g, we find that physiological saline contains 0.154 moles of NaCl per liter. That means that physiological saline (0.9% NaCl) has a molarity of 0.154 molar. We can either express this as 0.154 M or 154 millimolar (154 mM).
