Which of the following is a direct observation? a. music may plants grow b. the plant is 22cm on day 23 c. two plants must have died from insects d. the plants will likely grow 2cm per day 2. a new fertilizer is being tested to determine if it will plants grow. each day the researcher gives fertilizer to half the plants and measures the height of all plants. this is an example of which step in the scientific method? a. ask a question b. conduct the experiment c. form a conclusion d. from a hypothesis

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

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

How have the greenhouse gasses increased from the year 2000 to 2018