The Big Bang is responsible for the formation of two elements found in our universe, hydrogen and helium. The rest of the elements are created by stars during the various stages in their life cycle.

A. True

B. False

Which of the following combinations of reactants will result in a synthesis reaction? Cl2 + BaF2 Mg + HClO3 Li + H2O SO2 + H2O

Which of the following is an oxidation-reduction reaction? • SO2 (g) + H2O (1) H2SO3 (aq) • CaCO3 (s), Cao (s) + CO2 (g) Ca (OH) 2 (s) + H2CO3 (1) CaCO3 (aq) + 2H2O (1) • CsH1206 (s) + 602 (9) _, 6C02 (g) + 6H20 (7

What mineral has 2 sugar-cube sized, irregularly shaped pieces. Brassy-yellow in color with metallic luster. Flat surfaces look like little squares. Feels quite heavy. Has a blackish streak.

In this redox reaction identify the reducing agent 2MgO-> 2Mg+O2

Part A Determine the number of protons in each of the following isotopes of chr Enter your answers numerically separated by commas. DVI Aed 2 ? Cr - 50, Cr - 52, Cr - 53 Cr - 54 = Submit Request Answer

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

Synthesize What environmental effects are shared by all fossil fuels?