18. What element has 81 protons in the nuclei of its atoms?

What is heat energy? O vibrations of particles of matter O energy that moves things O energy that is carried by light O energy of moving electrons

Why is the ability of apple snails to survive an increase in the salinity of water considered an adaptation

Hydrogen gas can be formed by the reaction of methane with water according to the equation. CH4 + H20 - > CO + 3H2 In a particular reaction, 25.5 L of methane gas (measure at a pressure of 732 torr and temperature of 25 C) mixes with 22.

Arsenic reacts with chlorine to form a chloride if 1.587 g of arsenic reacts with 3.755 g of chlorine what is the simplest formula of the chloride

The atomic mass of Aluminum is 26.98154 g/mol. Is it possible to have 5.0*10-25g of Al

Which of the following requires an oxidizing agent? Al yields Al3+ 2 O yields O2 Cl2 yields 2 Cl- Ag + yields Ag

If a color change occurs when two solutions are mixed has a chemical reaction likely occurred?

Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca (OH) 2 (aq) + 2HCl (aq) → CaCl2 (aq) + 2H2O (l) CaO (s) + 2HCl (aq) →CaCl2 (aq) + H2O (l), ΔH = - 186kJ CaO (s) + H2O (l) →Ca (OH) 2 (aq), ΔH =

1. Calculate the end velocity of a rocket that traveled 16km in 2 seconds. distance time 2. Calculate the rockets acceleration m with a start velocity of 0m/s and the end velocity from #1 for 10 seconds.

How are linear and nonlinear graphs alike