The time is recorded from three different clocks as indicated below. the “true” time is exactly 8: 30 a. m.
which of the three clocks is the most precise?
which clock is the most accurate?
which clock(s) show a systematic error?

measurement clock a clock b clock c
1 8: 25.20 am 8: 29 am 8: 36 am
2 8: 25.00 am 8: 31 am 8: 36 am
3 8: 25.10 am 8: 30 am 8: 36 am

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?