Which of these orbital designations are invalid?

a. 4s

b. 2d

c. 3f

d. 3p

What is the mass of a solution that has a density of 0.755g/mL and a volume of 50.0 mL

Explain your reasoning for your formula prediction for Ba+2 and S-2

When the equation Al (OH) ₃ + H₂SO₄ - --> Al₂ (SO₄) ₃ + H₂O is balanced, the sum of the balancing coefficients is A. 5 B. 7 C. 11 D. 12

Which of these is true about light? A Sound and light travel at the same speed. B Light rays can bend. C Dull surfaces reflect light better than shiny surfaces. D The sun's light doesn't affect Earth's temperature.

Although strychnine is colorless, it has a very strong bitter taste.

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Which of the following is the most likeley example of an favorable mutation A. A mutation that makes a rabbit able run faster B. A mutation that changes the rabbit's fur to bright orange C. A mutation that changes the color of the rabbit's eyes D.

Which of these mole ratios is possible for this reaction? FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl 1:1 1:3 3:1 2:3

The chemical equation for reduction of phosphorite Ca3 (PO4) 2

Synthesize What environmental effects are shared by all fossil fuels?