When sodium reacts with chlorine, sodium chloride is produced. andrew represented this reaction with this equation: na + cl2 → 2nacl the equation is (blank 1) because the number of (blank 2) atoms is (blank 3) on both sides of the arrow. blank 1 a) balanced b) not balanced blank 2 a) chlorine b) sodium blank 3 a) equal b) not equal

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=