How does the law of conservation of mass apply to this reaction: mg + hcl → h2 + mgcl2 ?

the law of conservation of mass has already been applied. there is an equal number of each element on both sides of the equation.

only the hydrogen needs to be balanced. there are equal numbers of magnesium and chlorine.

the equation needs to be balanced. there are fewer hydrogen atoms in the equation than magnesium or chlorine.

hydrogen and chlorine need to be balanced. there is an equal amount of magnesium on each side

Utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must available hint(s)utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must pump water back into their cells to counter its loss due to osmosisactively pump water back out of their cells to counter its inflow due to osmosissynthesize membranes that are impermeable to substances that upset osmotic balanceactively pump salt back out of their cells to counter its inflow due to osmosis

An object's buoyant force and weight mean the same thing.a. trueb. false

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.