*Question*
Q: Reducing the production of what gas, or removing it from the air, are practices that could reduce global warming? Read this paragraph and choose the correct option from the provided answers: Efforts to reduce future global warming mainly involve energy use. We need to use less energy, for example, by driving more fuel-efficient cars. We also need to switch to energy sources that produce less carbon dioxide, such as solar and wind energy. At the same time, we can increase the amount of carbon dioxide that is removed from air. We can stop destroying forests and plant new ones. Choices: - helium - hydrogen - oxygen - carbon dioxide A:
**Answer**
carbon dioxide

*Question*
Q: What are passed from one generation to the next so species can survive? Read this paragraph and choose the correct option from the provided answers: Choices: - selections - mutations - fluctuations - adaptatioins A:
**Answer**
adaptatioins

*Question*
Q: Because the nuclei of each h atom contain protons, the electrons in the bond are attracted to the nuclei (opposite charges attract). but because the two atoms involved in the covalent bond are both h atoms, each nucleus attracts the electrons by the same amount. thus the electron pair is equally shared by these? Read this paragraph and choose the correct option from the provided answers: Because the nuclei of each H atom contain protons, the electrons in the bond are attracted to the nuclei (opposite charges attract). But because the two atoms involved in the covalent bond are both H atoms, each nucleus attracts the electrons by the same amount. Thus the electron pair is equally shared by the two atoms. The equal sharing of electrons in a covalent bond is called a nonpolar covalent bond. Now consider the HF molecule:. Choices: - four atoms - one atom - nine atoms - two atoms A:
**Answer**
two atoms

*Question*
Q: When we neutralize a weak base with a strong acid, the product is ________ containing the conjugate acid of the weak base. Read this paragraph and choose the correct option from the provided answers: Salts of Weak Bases and Strong Acids When we neutralize a weak base with a strong acid, the product is a salt containing the conjugate acid of the weak base. This conjugate acid is a weak acid. For example, ammonium chloride, NH4Cl, is a salt formed by the reaction of the weak base ammonia with the strong acid HCl: NH 3(aq) + HCl(aq) NH 4 Cl(aq) A solution of this salt contains ammonium ions and chloride ions. The chloride ion has no effect on the acidity of the solution since HCl is a strong acid. Chloride is a very weak base and will not accept a proton to a measurable extent. However, the ammonium ion, the conjugate acid of ammonia, reacts with water and increases the hydronium ion concentration: NH 4 +(aq) + H 2 O(l) H 3 O +(aq) + NH 3(aq) The equilibrium equation for this reaction is simply the ionization constant. Ka, for the acid NH 4 + :. Choices: - an electron - an ion - water - salt A:
**Answer**
salt