Which is an example of pseudoscience? A. use of X-rays to observe the bones of the arm B. use of DNA analysis to determine paternity C. use of vaccines to prevent the occurrence of disease D. use of astrology to predict the personality of a child

Which medium allows sound to travel faster, air or water?

What is the position of an element in the periodic table if its electron configuration is 1sÆ 2sÆ 2pÒ 3sÆ 3p¢?

A mass of 21.5 grams of calcium hydroxide reacts with an excess of phosphoric acid. what mass of calcium phosphate could be recovered from solution?

3. List the three main parts of an atom and their electrical charges.

Which atom is involved in giving your heat energy to beat

Which would exhibit characteristics of both a metal and a nonmetal? select one: a. si b. ge c. sb d. po e. all of the above exhibit characteristics of both a metal and a nonmetal?

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Which of the following is the most likeley example of an favorable mutation A. A mutation that makes a rabbit able run faster B. A mutation that changes the rabbit's fur to bright orange C. A mutation that changes the color of the rabbit's eyes D.

Which of these mole ratios is possible for this reaction? FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl 1:1 1:3 3:1 2:3

The chemical equation for reduction of phosphorite Ca3 (PO4) 2