If Chris throws the baseball 60 meters in 4 seconds, what is the average speed of the football?

What is the mass in grams of 361 mL of this liquid?

How did the experiement with the iron filings and sulfur compare with the experiment in which copper sulfate pentahydrate was heated? Both resulted in gas formation. Both resulted in color change. Both involved chemical change.

Which best explains why water is able to "stick" to the side of glass?

tandard reduction potentials are 1.455 V for the PbO2 (s) / Pb (s) couple, 1.82 V for Co3 (aq) / Co2 (aq), 3.06 V for F2 (g) / HF (aq), 1.07 V for Br2 (l) / Br - (aq), and 1.77 V for H2O2 (aq) / H2O (l).

Fill in the blanks when an atom loses an electron it becomes an

2NO + O2 → 2NO2 What type of chemical reaction is shown above? a combustion reaction b double displacement C synthesis d decomposition e single displacement

Why did Bromophenal solutions change from yellow to blue (what chemical reaction happended) ?

How many milliliters of calcium, with a density of 1.55 g/mL, are needed to produce 85.8 grams of calcium fluoride in the single replacement reaction below? Show all steps of your calculation as well as the final answer.

If object A is placed on the pH scale at pH = 3 and object B is placed at pH = 8, which of the following must not be true? A. Object B has a higher hydroxide ion concentration than object A. B. Object B is closer to a neutral pH than object A. C.

Laboratory safety is not an important concern for scientists. True or false