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Which statement is false?
1. there are no lone pairs of electrons on the central atom.
2. the atoms are joined by sigma bonds.
3. there are more shared electrons than non-
shared electrons.
4. the number of bonding orbitals equals the number of anti-bonding orbitals.
5. the molecule is not polar.
2 AnswersChemistry2 years agoAndrea was watching her brother in the ocean and noticed that the waves were coming into the beach at a frequency of?
0.367347 Hz.
How many waves hit the beach in 49 s? Answer in units of waves.
3 AnswersPhysics2 years agoIn the periodic table, the number 89 associ- ated with the symbol Ac (actinium) repre- sents?
1. the mass of one mole of actinium atoms. 2. the number of energy levels in one ac-
tinium atom.
3. the number of neutrons in one atom of actinium.
4. the relative mass of one atom of ac- tinium.
2 AnswersChemistry2 years agoWhich of the following is FALSE?
1. The mass of a proton is much larger than the mass of an electron.
2. The mass of protons and neutrons are about the same.
3. The mass of a hydrogen atom is about the same as a proton.
4. The mass of neutrons and electrons are about the same.
6 AnswersPhysics2 years ago4.8 g of a hydrocarbon fuel is burned in a calorimeter that contains 275 grams of water initially at 25.00◦C.?
After the combustion, the temperature is 26.55◦C. How much heat is evolved per gram of fuel burned? The heat capacity of the calorimeter (hardware only) is 92.3 J/◦C.
1. 371 J/g
2. 143 J/g
3. 1783 J/g
4. 6022 J/g
5. 28908 J/g
6. 1926 J/g
7. 401 J/g
8. 6394 J/g
3 AnswersChemistry2 years agoMartin finds a piece of metal in a scrap yard and weighs it. Its mass is found to be 34125 kg and its volume is 1.77 m3 as determined by?
by immersion in water.
What is the likely identity of this metal? The densities of common metals are
Metal Au Cu Fe Al Hg
g/cm3 19.3 8.9 7.9 2.7 13.6
1. None of these 2. aluminum
3. mercury
4. iron
5. gold 6. copper
Physics2 years agoWhat is the total mass of mercury in the tank?
A water holding tank measures 105 m long, 50 m wide, and 8 m deep. Traces of mercury have been found in the tank, with a concen- tration of 60 mg/L. What is the total mass of mercury in the tank? Answer in units of kg.
1 AnswerChemistry2 years agoA plastic tube allows a flow of 12.7 cm3/s of water through it. How long will it take to fill a 238 cm3 bottle with water?
Answer in units of s.
2 AnswersPhysics2 years agoI really don’t know how to do this plz help!!!?
Use the SI prefixes to convert these hypothet- ical units of measure into appropriate quanti- ties.
Express 49 rations in dekarations. Answer in units of dekaration.
004 (part 2 of 5) 10.0 points
Express 7576 mockingbirds in kilomocking- birds.
Answer in units of kmockingbird.
005 (part 3 of 5) 10.0 points
Express 10−4 phones in microphones. Answer in units of μphone.
006 (part 4 of 5) 10.0 points
Express 10−9 goats in nanogoats. Answer in units of ngoat.
007 (part 5 of 5) 10.0 points
Express 1017 miners in examiners. Answer in units of Eminer.
1 AnswerHomework Help2 years ago