INTRO TO CHEMISTRY OBJECTIVE ASSESSMENT WGU D425 ACTUAL EXAM WITH QUESTIONS AND CORRECT VERIFIED ANSWERS GRADED A+ || 100% GUARANTEED PASS NEWEST VERSION

INTRO TO CHEMISTRY OBJECTIVE ASSESSMENT WGU D425 ACTUAL EXAM WITH QUESTIONS AND CORRECT VERIFIED ANSWERS GRADED A+ || 100% GUARANTEED PASS NEWEST VERSION describe the study of mass relationships btwn reactants and products in a chemical reaction - Answer ️quantitative relation btwn the number of moles and mass of various products and reactants in a chemical reaction calculate the limiting reactant in the chemical equation , knowing that 3.25g of NH3 reacts with 3.50g of O2 4NH3 (g) + 5O2 (g) - 4NO (g) + 6H2O (l) - Answer ️O2. 4 NH3+5O2 - 4 NO+6H2O 3.25g of NH3= 3.25g/ 17g mol-1 = 0.19 mol of NH3. available mass of O2 is 3.50 or 3.50g/32 mol-1 =0.11 mol of O2. Since (0.11 mol) is less than NH3 (0.19 mol) , the limiting reagent is O2 what is the theoretical yield - Answer ️maximum amount of product that can be formed in a chemical reaction. Formed based on the amount of limiting reactant in a chemical reaction 45.599g of phosphorous (P4) were allowed to react w/ 67.900g of oxygen (O2). If 95.201g of P4O10 were actually produced in the lab what is the percent yield (%yield=actual yield/theoretical yield x 100) molar mass (g/mole): P4= 123.88, O2= 31.998, P4O10= 283.87 P4 + 5O2 - P4O10 - Answer ️ which reaction represents a double-replacement reaction - Answer ️ the equitation represents Ba(NO3) + Na2SO4(aq) - BaSO+2NaNO3(aq) - Answer ️ which group does mercury belong to - Answer ️ which group 14 element is a metalloid - Answer ️ what is the correct formula of aluminum iodide - Answer ️ what is the correct formula of the ionic compound formed from Co3+ and O2- - Answer ️ why does water have tetrahedral electron geometry - Answer ️ what is the geometry of HCN - Answer ️ what equation represents the reaction btwn aqueous sodium chloride and aqueous lead (ll) nitrate to form aqueous sodium nitrate and solid lead (ll) chloride - Answer ️ equation correctly represents the reaction btwn mercury and sulfuric acid to form mercury (ll) sulfate, sulfur dioxide, and water - Answer ️ a person combines 6 moles of hydrogen (H2) and 3 moles of oxygen (O2) to produce water (H2O) what is the theoretical yield of water - Answer ️ chlorine gas (Cl2) occupies 250. ml within a tank at STP (273 K and 1 atm) how many moles of chlorine are contained in the tank - Answer ️ 0.9 g of sodium iodide (NaI), ). 0.5g of manganese (ll) oxide (MnO2) and 0.3g of sulfuric acid (H2SO4) are mixed to produce sodium sulfate (NaSO4), 0.02g of manganese (ll) sulfate (MnSO4), water, and iodine (I2) what are the limiting reactant and the percent yield for manganese (ll) sulfate - the following reaction for producing iodine gas : 2NaI+ MnO2+ 2H2SO4- NaSO4 + MnSO4 + 2H2O + I2 - Answer ️ which parts of a solution are correctly paired 50ml H2O (solute) + 25ml of acid (solvent) = 75ml of solution 50ml H2O (solvent) + 25ml of acid (solute) = 75ml of solute 50ml H2O (solution) + 25ml of acid (solute) = 75ml of solvent 50ml H2O (solvent) + 25ml of acid (solute) = 75ml of solution - Answer ️50ml H2O (solvent) + 25ml of acid (solute) = 75ml of solution. solution is made of a solute being dissolved in a solvent how would the solubility of solid Calcium Carbonate (CaCO3) in water be correctly described - Answer ️Insoluble. solubility rules state that carbonates are only soluble when combined with ammonium or alkali metals. Calcium is a group 2 metal and is insoluble when combined with carbonate what types of compounds will be soluble in water - Answer ️polar compounds bc water is polar. describe the characteristics of a type of solution - Answer ️an unsaturated solution contains less than the maximum amount of solute that is capable of being dissolved. unsaturated solution can dissolve more solute what happens to the solubility of most liquids and solids as the temperature increases - Answer ️the solubility increases. increasing temperature put a stress on the equilibrium of the particular solid or liquid, causing more solubility in a closed system that allows transfer of energy but not matter with the surroundings, what happens to a gas in a liquid when pressure is increased - Answer ️gas volume decreases & gas concentration increases. Henry's law states that the solubility of gases in liquids is proportional to the gases above the liquid. this means that there is a decrease in the gas volume and an increase in the gas concentration