Humber 1 2 Mg= 0= d speaker notes Ca= 0= Reactants Mg+ 0₂ Ca+ 0₂ Yield → → Mg= 0= Ca= 0= Products MgO CaO

Predict the chemical formulas of the compounds formed by the following pairs of ions.

Ex. 110 - Calculating Mass of 3 attempts left Check my work What mass of oxygen is needed to react with 1.79 gal of methanol according to the balanced equation below? (1.00 gal = 3.79 L, and the density of methanol is 0.793 g/mL.) 2 CH3OH() + 3 02g) – 2 CO2g) + 4 H2O(g) If appropriate, express your answer in scientific notion. (Click on the answer box to show the pallet.) < Prev 3 of 5 ***** ****

How can we find the percentage? And the produced?

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Fumaric bromination 2.5 mL 10% bromine was added to 0.200g of fumaric acid. Calculate the limiting reagent and % yield of the reaction. NB: use density to find the mass of bromine.

Q) A student misreads the directions and adds 4.0 g of benzoic acid instead of 0.4 g. What do you expect to happen? Would the experiment still be valid? Explain your reasoning.     Pure Lauric Acid Lauric Acid + 0.4 g Benzoic Acid Lauric Acid + 0.5 g Benzoic Acid Mass of Lauric Acid   3.03g 3.00g 3.00g Mass of Benzoic Acid   0 g 0.40g 0.50g Freezing Point   43’C 39’C 38’C Freezing Point Depression *   4’C 5’C Molality of Benzoic Acid in Lauric Acid*   1.026 mol/kg 1.282 mol/kg Moles of Benzoic Acid *   0.003 moles 0.004 moles Experimental Molar Mass of Benzoic Acid *   133.3g/mol 125 g/mol Average Molar Mass *   129.15g/mol   Percent Error *   5.75%

0.10 M formic acid (HCHO₂) Ka = 1.8 x 104 0.10 M sodium formate (NaCHO₂) 0.10 M acetic acid (HC2H302) Ka = 1.8 x 10¹5 0.10 M sodium acetate (Na C₂H30₂) 0.10 M carbonic acid (H₂CO3) Ka = 4.3 x 107 0.10 M sodium bicarbonate (NaHCO3) 0.10 M KOH 0.10 M HCI 0.10 M boric acid (H3BO3) Ka = 5.8 x 10-10 0.10 M sodium borate (NaH₂BO3) 4. Which reagents listed above should be mixed to result in a buffer of about pH 6-8?

All the following reactions follow the law of conservation of mass except--- 4CO2 + 2H2O 2Fe2O3 2C2H2 +502 4Fe +302 NaHCO3 Na2CO3 + H2O + CO2 2CH3OH + 302 2CO2 + 4H₂O

Answered -Correct! U8HW Question 15 == Homework 11:59 PM Answered Due Mar 19th, Resubmit Reacting water with magnesium nitride produces ammonia (NH3) and magnesium hydroxide. If this process is 70% efficient, what mass of ammonia (in kg) can be prepared from 19.5 kg of magnesium nitride? Type your numeric answer and submit 2.28 Answered - Incorrect U8HW Question 16 K Answered Due Mar 19th, == Homework 11:59 PM ⭑ You are incorrect Resubm Open in Reading