16. Ned observed an unknown chemical (A) reacting with hydrochloric acid (HCI). The reaction formed potassium chloride salt (KCl) and another unknown substance (B). Ned wrote down what he knew about
the reaction:
A + HCl → KCl + B
From this information, Ned inferred that unknown substance A was potassium (K) and that unknown
substance B was hydrogen (H2). What is another logical interpretation of this data?
a. A is chlorine (Cl) and B is hydrochloric acid (HCI).
b. A is potassium chloride (KCl) and B is hydrochloric acid (HCI).
c. A is potassium hydroxide (KOH) and B is hydrogen gas (H2).
d. None of the above.

Is this a single replacement reaction or there is no

Which of the following happens during cell division? (a) energy is created (b) waste is eliminated (c) carbon dioxide is released (d) damaged cells are replaced

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