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What type of elements generally bond covalently, and how do they satisfy the octet rule?

Find the formula for the compound that contains 72.40% iron and 27.60% oxygen.

When heat energy is added two changes are observed: Change A: solid changes phases to a liquid Change B: liquid changes phases to a gas What are the names or phase changes in A and B

The student who performed this experiment in the question above wrote the following discussion: "The gas sample is known to contain compounds of only hydrogen and carbon. The measured molecular weight of the flammable gas is closest propane (44.

The atomic masses of 79Br35 (50.69 percent) and 81Br35 (49.31 percent) are 78.9183361 and 80.916289 amu, respectively. Calculate the average atomic mass of bromine. The percentages in parentheses denote the relative abundances.

A caterpillar has an exoskeleton and feeds on many leaves before it makes a cocoon and becomes a butterfly. Which type of organism is a caterpillar? 1. an autotroph and an invertebrate 2. a heterotroph and an invertebrate 3.

Which of the following gases is produced by a storage battery when it's charging?

Ann and Carol each lift the timber with a force of 80 kg/m/s2. If they lift the timber a distance of 1.25 meters, how much work is each woman doing? Question 1 options: 64.00 J 78.75 J 81.25 J 100.00 J

If there are 2.54cm in an inch, how many inches are in 14.8cm?

Given the reaction: 2 Na (s) + Cl 2 (g) → 2 NaCl (s) The conversion factor for chlorine gas to sodium chloride is: 1 mol Cl 2 ≡ 2 mol NaCl. True or false?