Answer the following question given this paragraph: In our calculation, we have ignored the reaction of the weakly basic anion with water, which tends to make the actual solubility of many salts greater than the calculated value. Exercise One crystalline form of calcium carbonate (CaCO3) is the mineral sold as "calcite" in mineral and gem shops. The solubility of calcite in water is 0.67 mg/100 mL. Calculate its Ksp. Answer: 4.5 109. Q: One crystalline form of calcium carbonate is the mineral sold as what? Choices: - quartz - basalt - salt - calcite A:
calcite
(Question)
Answer the following question given this paragraph: Upwelling brings nutrients to the surface from the ocean floor. Nutrients are important resources for ocean life. However, they aren't the only resources on the ocean floor. Q: What process brings nutrients from the ocean's floor to its surface? Choices: - Down welling - coastal swell - Tides - upwelling A:
(Answer)
upwelling
Ques: Answer the following question given this paragraph: The planets make slightly elliptical orbits around the Sun. Q: What is the shape of the orbits that planets make around the sun? Choices: - conical - variable - elongated - elliptical A:
Ans: elliptical
(Q).
Answer the following question given this paragraph: When chemists synthesize a new compound, they may not yet know its molecular or structural formula. In such cases, they usually begin by determining itsempirical formula, the relative numbers of atoms of the elements in a compound, reduced to the smallest whole numbers. Because the empirical formula is based on experimental measurements of the numbers of atoms in a sample of the compound, it shows only the ratios of the numbers of the elements present. The difference betweenempirical and molecular formulas can be illustrated with butane, a covalent compound used as the fuel in disposable lighters. The molecular formula for butane is C4H10. The ratio of carbon atoms to hydrogen atoms in butane is 4:10, which can be reduced to 2:5. The empirical formula for butane is therefore C2H5. The formula unit is the absolutegrouping of atoms or ions represented by the empirical formula of a compound, either ionic or covalent. Butane, for example, has the empirical formula C2H5, but it contains two C2H5 formula units, giving a molecular formula of C4H10. Because ionic compounds do not contain discrete molecules, empirical formulas are used to indicate their compositions. All compounds, whether ionic or covalent, must be electrically neutral. Consequently, the positive and negative charges in a formula unit must exactly cancel each other. If the cation and the anion have charges of equal. Q: All compounds, whether ionic or covalent, must be what? Choices: - abnormal neutral - organic neutral - metallic neutral - electrically neutral A:
(A).
electrically neutral
Ques:Answer the following question given this paragraph: An element is a pure substance that cannot be broken down into different types of substances. There are almost 120 known elements ( Figure below ), each with its own personality. The chemical and physical properties of one element differ from any other. Elements are arranged according to their properties in the Periodic Table . Q: What do you call a pure substance that cannot be broken down into different types of substances? Choices: - molecule - sample - compound - element A:

Ans:element
Ques:Answer the following question given this paragraph: A lipid is an organic compound such as fat or oil. Organisms use lipids to store energy, but lipids have other important roles as well. Lipids consist of repeating units called fatty acids. There are two types of fatty acids: saturated fatty acids and unsaturated fatty acids. Q: What are the two types of fatty acids? Choices: - saturated and biodegradable - saturated and endogenous - hydrochloric and carboxylic - saturated and unsaturated A:

Ans:
saturated and unsaturated