Homework answers and tutorials

Waiting for answer What is an f orbital?
An f orbital is an orbital for which the secondary quantum number l = 3. There are seven f orbitals, with ##m_l## = 3, 2, 1, 0, 1, 2, and 3. The f orbitals aren't occupied in the ground state until element 58 (cerium). The of cerium is [Xe] ##6s^2 4f 5d##. Even for beyond cerium, the f orbi...
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Waiting for answer Belina bought 4 1/2 yards of red fabric. She also bought 6 y...
##1 1/2## yards Because we are looking for the difference in two numbers (how much more), we can use subtraction. The amount more white fabric than red fabric is solvable through th...
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Waiting for answer How many properties of matter are there?
There are thousands of properties of matter. We usually divide properties into . If we want to list the chemical properties of sodium, for example, we must state how it reacts with water and chlorine. Then comes hydrochloric acid, molten carbon, etc. Every property is a separate chemical property...
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Waiting for answer The halflife of plutonium239 is 24,100 years. Of an origin...
##"6.25 g"## The of a nuclide tells you how much time must pass before half of an initial sample of said nuclide undergoes radioactive decay. Simply put, an initial sample of r...
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Waiting for answer How do amino acids affect enzymes?
Enzymes are just a type of proteins with a catalytic function, and proteins are made by amino acids. You have to think in a protein as a whole, but as an amino acid chain too. There...
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Waiting for answer What is a thallus?
A thallus is a green shoot or stem. It cannot be distinguished as a leaf, stem, or root. It is often the main part of an algae. The thallus of a fungus is usually called a mycelium. This is a liverwort. Figure (a) is female and figure (b) is male. Classification of lichens is based on the thal...
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Waiting for answer What is keratin in the integumentary system? What is the pur...
Keratin is the main constituent of the stratum corneum of tetrapods and especially the amniotic Keratin is a protein found in the skin of several species of vertebrates (reptiles, ma...
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Waiting for answer How come some seedless plants reproduce only asexually durin...
Some seedless plants reproduce asexually during the dry times of year because the factors which helps to asexually reproduce seems to be unaffectionate in the wet seasons. As the as...
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Waiting for answer What is the area of a square that has a perimeter of 12 feet...
The area of a square is ##9## sq.feet The perimeter of the square wih side ##a## is ##4*a## The area of a square wih side ##a## is ##a^2## ##4*a=12 :.a=3 :. a^2=9## The area of...
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Waiting for answer Player As longest home run distance is 484 ft. If Player A h...
the answer is 2178 you take the longest distance, 484 ft, then multiply it times the number of times he hits home runs and you get your answer.
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Waiting for answer How do you solve ##sin 3x = 0##?
sin 3x = 0 ##a. sin 3x = 0 = sin 0  x = 0## ##b. sin 3x = 0 = sin pi  3x = pi  x = pi/3## ##c. sin 3x = 0 = sin 2pi  3x = 2pi x = (2pi)/3##
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Waiting for answer What is the square root of 35/36?
##sqrt(35)/6 ~~ 0.9860133## If ##a, b 0## then ##sqrt(a/b) = sqrt(a)/sqrt(b)## So in our case: ##sqrt(35/36) = sqrt(35)/sqrt(36) = sqrt(35)/6## ##sqrt(35) = sqrt(5*7)## cannot...
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Waiting for answer Compare and contrast Ivan the Terrible and Peter the Great?
Ivan the Terrible was more of a psychopath, ruling with extreme violence, whereas Peter the Great had more of a purpose for Russia in mind during his reign. Both of these Russian rul...
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Waiting for answer The angles of a triangle are in the ratio 3:4:5. How do you...
Let's call the angles ##3x,4x and 5x## They must add up to ##180^o## in a triangle, so: ##3x+4x+5x=12x=180 x=180//12=15## So the angles are: ##3*15=45^o## ##4*15=60^o## ##5*15=75^o## Check answer: ##45+60+75=180##
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Waiting for answer Are there 31 pairs of cranial nerves and 12 pairs of spinal...
12 pairs cranial 31 pairs spinal 12 pairs of cranial nerves arise from the brain 31 pairs of spinal nerves 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal....
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Waiting for answer What is the electron configuration of argon?
The electronic configuration of Argon (atomic number is 18) is ##1s^2 2s^2 2p^6 3s^2 3p^6## Note: For writing the electronic configuration of , the Aufbau Principle is used. In Aufbau Principle, the electrons are filled according to the increasing energy level of orbitals. According to the Aufb...
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Waiting for answer When HCl(aq) is titrated with NH3(aq), the pH at the equival...
The answer is (b) ##"pH" 7## Hydrochloric acid, ##"HCl"##, a strong acid , will react with ammonia, ##"NH"_3##, a weak base , to form ammonium ions, ##"NH"_4^(+)## and chloride an...
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Waiting for answer What is the Endpoint Formula?
Let's say you had one midpoint given. If you had neither endpoint given nor another midpoint given, then there are an infinite number of endpoints possible and your point is arbitrarily placed (because you only have one point available). So, to find an endpoint, you need one endpoint and a designa...
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Waiting for answer How to define which animal's blood is what color?
The colour of an animal's blood depends on the type of protein found in its blood cells which transports oxygen. For example, in humans blood is red because our red blood cells cont...
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Waiting for answer At what distance from the base of a right circular cone must...
The plane should cut the cone at a distance of ## 0.26319h## from the base. This kind of problem can appear to be deceptively easy. The best way to solve it is to tell it "Resistance...
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