If there are 70 million tons of ore, and that gonna produce about 7 metric million tons of zinc metal over a country in 24 years.
sphalerite is a mineral that is the chief ore of zinc. it consists largely of zinc sulfide in crystalline form but almost always contains variable iron.
if cadmium (cd) content of four sphalerite samples at the country averaged about 110,000 ppm.
if cd can cause kidney damage to human, and the drinking water stander for cd in drinking water is under 0.005 (mg/l)2
answer the following questions:
a. what's the amount (in metric tons) of sphalerite gonna be mined to obtain that 6.96 metric million tons of zinc metal?
b. what's the amount (in metric tons) of refined cd metal were produced over the years at the country?
c. does the drinking water standard apply?
d. what's the max contaminant level allowed?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

What is the relationship between wind and ocean waves? question 17 options: wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves. wind moving at higher speeds will transfer energy over a larger part of the ocean water, resulting in waves with a shorter wavelength. winds moving at higher speeds with cause water to move forward at faster rates, causing larger ocean waves. winds moving at higher speeds will affect deeper water, resulting in waves that move at a faster rate. how do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water