Rank from most to least number of valence electrons. To rank items as equivalent, overlap them.

Arrange the elements in decreasing order of the number of valence electrons.

kr

ca

ba

br

li

f

as

sb

o

al

cl

si

na

ar

sr

What is the volume, in mL, of 0.50 moles of ammonia (NH3) at STP? A. 1120 L B. 22.32 mL C. 8500 mL D. 11,200 mL

1.69 cm x 29.316cm x 528.1cm

8. Which of the following compounds is an ionic compound? (metal) a. So3 b. BaF2 C. H20 d. co

Infer what are some benefits of genetically engineered crops

Given: CaC2 + N2 → CaCN2 + C In this chemical reaction, how many grams of N2 must be consumed to produce 265 grams of CaCN2? Express your answer to three significant figures. The reaction requires how many grams of N2?

The relationship between number of particles and pressure is As number of particles increases, pressure increases As number of particles increases, pressure decreases The two are not related

Consider the reaction: Al2S3 + 6 HCl → 2 AlCl3 + 3 H2S The reaction has a 29.1% yield. How many grams of Al2S3 are needed to react with 30.0 moles of HCl? a) The molar mass of Al2S3 is 150.16 grams/mole. b) The molar mass of HCl is 36.46 grams/mole.

Why is Earth's temperature just right for life? A. Earth's core is hot enough to heat Earth's surface. B. Earth's magnetic field creates suitable temperatures on Earth's surface. C. Earth's crust is warmed by heat from the sun. D.

Which of the following is an example of a chernical change? Boiling water Burning paper Dissolving sugar in water Melting gold

Part a by drawing molecular orbital diagrams for b2, c2, n2, o2, and f2, predict which of these homonuclear diatomic molecules are magnetic.