**BRAINLIEST** I already figured out half of it.

1. Calculate the actual yield of magnesium oxide for each trial.
Trial 1: 0.585g
Trial 2: 0.417

2. Magnesium is the limiting reactant in this experiment. Calculate the theoretical yield of MgO for each trial.

Trial 1: 0.357g
Trial 2: 0.254

3. Determine the percent yield of MgO for your experiment for each trial.

Trial 1:
Trial 2:

4. Determine the average percent yield of MgO for the two trials.
Trial 1 Trial 2
Mass of empty crucible with lid 26.679g 26.679g
Mass of Mg metal, crucible, and lid 27.036g 26.033g
Mass of MgO, crucible, and lid 27.264g 27.096

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.