Evidence suggests that giraffes once had short necks. how does natural selection explain why giraffes now have long necks

If two cars get a 4 way stop intersection at the same time, which car should be yeiled the right of way

Alyssa is trying to balance the following equation: Pb (OH) 2 + 2H2SO4 = > PbSO4 + 2H20 What number should be used to replace the question mark (?) shown in the equation above to balance it? O a. 3 O b. 1 Oco O d. 2 Oe. 4

Consider a general reaction a) The ΔG° of the reaction is - 4.140 kJ mol. Calculate the equilibrium constant for the reaction. (Assume a temperature of 25°C.) b) What is ΔG at body temperature (37.0°C) if the concentration of A is 1.

Lysine, which is an essential amino acid, contains only C, H, N, and O. In one experiment, the complete combustion of 2.175 g of lysine produces 3.93 g of CO2 and 1.87 g of H2O. In a separate experiment, 1.873 g of lysine produces 0.436 g of NH3.

What is the energy of one photon of light with a wavelength of 445 nm?

13. Adding thermal energy to a gas at constant pressure will cause

A 3 ml volume of a solution containing an unknown concentration of hcl is added to 7 ml of water. it is then determined that the concentration of the hcl in the diluted solution is 630 mm. what was the concentration of hcl in the original solution?

How do you find the ph of water

How many total electron will fit in the 1st energy level

Which statement best explains how the models differ? Model A shows the formation of ions, and model B does not show the formation of ions. Model A does not show the formation of ions, and model B shows the sharing of electrons.