7. how many liters of nh3, at stp will react with 10.6 g o2 to form no2 and water? 4nh3(g) + 7o2(g) → 4no2(g) + 6h2o(g) *
a. 2.12 l
b. 3.03 l
c. 4.24 l
d. 6.49 l
8. what is the maximum number of grams ph3 that can be formed when 3.4 g of phosphorus reacts with 4 grams of hydrogen to form ph3? p4(g) + 6h2(g) → 4ph3(g) *
a. 3.7 g
b. 6.8 g
c. 45 g
d. 270 g
9. which of the following is not true about percent yield? *
a. percent yield is often less than 100%
b. percent yield measures the efficiency of a reaction carried out in a lab.
c. percent yield of 100% is unlikely when reactants or products were not carefully measured.
d. percent yield is the ratio of theoretical yield to actual yield expressed as a percent.

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

1. an experiment in your science class lists the materials needed for the lab. it is your job, as a lab partner, to measure out 25 ml of distilled water and 2.5 grams of magnesium. what lab measuring tools would you choose to measure each substance and how would you use each tool to get the correct amounts? be sure to describe the process you would follow step-by-step. (5 points) 2.which of the following is an si base unit for measuring mass? (2 points) ampere gram meter pound 3.which of the following is an si base unit for time? (2 points) decades hours minutes seconds 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer. 5.a pencil beside a metric ruler. the ruler is scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number. one end of the pencil is beside the 0 on the ruler, and the pencil point is beside the 5. which of the following measurements is accurate but not precise? (2 points) 5 mm 5 cm 50 mm 50 cm 6. which of the following prefixes represents the largest value? (2 points) giga hector kilo milli 7. which of the following types of graphs is best for plotting the percentages of a whole value in a data set? (2 points) bar graph circle graph histogram line graph

How does climate change cause the ocean's thermohaline current to slow down?