Answer:
1.2 x 10²⁴atoms
Explanation:
Given parameters:
Molar mass of Mg = 24.3g/mol
Mass of Mg = 48.6g
Number of atoms in 1 mole = 6.02 x 10²³ atoms
Solution
We know that
1 mole contains 6.02 x 10²³ atoms
Now we have to find the number of moles that are in the given mass of the magnesium atom.
Number of moles =
Number of moles = = 2mole
Now 2 moles of Mg will contain 2x 6.02 x 10²³ atoms = 1.2 x 10²⁴atoms
The percentage of dissolved salt in saltwater
is 3.5%. We are given the amount seawater sample. <span>We would just multiply the two values together.
750 g (0.035) = 26.25 g NaCl
26.25 g NaCl ( 1 mol / 59.44 g ) ( 1 mol Na / 1 mol NaCl ) ( 22.99 g / 1 mol ) = 10.15 g Na
Hope this answers the question. Have a nice day.</span>
Answer:
D. Waste management issues
Explanation:
Answer A: The five major types of pollution - water pollution, air pollution, land pollution, light pollution, noise pollution - have negative effects on the environment, on human health, and our planet as a whole.
Answer B: Urban Heat Island (UHI) is an urban area that is significantly warmer than its surrounding rural areas due to human activities. UHI decreases air quality.
Answer C: The increased use of surrounding land is the main cause of biodiversity loss.
Answer D: Any field of environmental management help people to solve pollution problems. So, D is the correct answer.
....
Hope this answer can help you. Have a nice day!
Answer:
Overpopulation will strain current water resources to their limits, cause an increase in water pollution, and lead to an increase in civil and international conflicts over existing water supplies. ... Growths in regional and global population will also lead to increased cases of water pollution