How does the law of conservation of mass apply to this reaction: Mg + 2HCl → H2 + MgCl2? The equation needs to be balanced. There are fewer hydrogen atoms in the equation than magnesium or chlorine.

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.

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

Adoctor is trying to diagnose a patient with dry skin. which of the following resources would be the most ? a magazine ad about soft skin a growth chart online articles about dry skin medical books

Determine if the following statement is true or false. if true, choose true. if false, choose the rewording that is true. according to the law of independent assortment, alleles for each gene are inherited together so that they always stay together. according to the law of independent assortment, offspring express a combination of their parents' traits. according to the law of independent assortment, alleles for a characteristic split during meiosis and combine during fertilization. true according to the law of independent assortment, alleles for each gene are inherited independently so that no two alleles stay together.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area