Chemistry

Isotopes

Element X has 4 isotopes with a mass of 24.328 amu, 23.422 amu, 29.687 amu, and 29.999 amu respectively. The percent abundance for the first two isotopes are 10% each and the last two isotopes are 40% each. Calculate the average atomic mass of this isotope. Report your answer without units 

Which statement is true for a cooling curve? A.) It shows how the temperature of the substance falls as heat is removed. B.) It shows how the temperature of the substance changes when heat is applie

Which statement is true for a cooling curve? A.) It shows how the temperature of the substance falls as heat is removed. B.) It shows how the temperature of the substance changes when heat is applied. C.) It shows the increase in the average kinetic energy of the particles. D.)It shows how heat absorption affects […]

Heather is testing a substance as to whether it is organic or inorganic. She works with the solid substance and discovers it can conduct electricity without burning. She also knows the carbon to oxyge

Heather is testing a substance as to whether it is organic or inorganic. She works with the solid substance and discovers it can conduct electricity without burning. She also knows the carbon to oxygen ratio is 1 to 2. What conclusion can she make from her experiment? The substance is organic because it is solid […]

The central vacuole in a plant cell is responsible for turgor pressure. When the vacuole loses water the cytoplasm “shrinks”. When the vacuole gains water the cytoplasm seems to “puff up”. One structu

The central vacuole in a plant cell is responsible for turgor pressure. When the vacuole loses water the cytoplasm “shrinks”. When the vacuole gains water the cytoplasm seems to “puff up”. One structure helps the plant cell keep its shape no matter how much water is in the vacuole. This is the A) cell wall. […]

The diagram below is an artist’s impression of a single atom of element Be. The neutrons are shown with stripes, the protons are gray, and the electrons are black. These particles are not drawn to s

The diagram below is an artist’s impression of a single atom of element Be. The neutrons are shown with stripes, the protons are gray, and the electrons are black. These particles are not drawn to scale. Which element below could be an isotope of this atom? Need Help Asap! please and thank you. A.sodium-10 B.beryllium-10 […]

The reaction of n−bromosuccinimide with 4−methyl−3−nitroanisole has been reported in the chemical literature. this reaction yields a single product in 95% yield. identify the product formed fr

The reaction of n−bromosuccinimide with 4−methyl−3−nitroanisole has been reported in the chemical literature. this reaction yields a single product in 95% yield. identify the product formed from this starting material.

Calculate the ph of a 0.50 m solution of sodium acetate (nach3coo) given that the ka of acetic acid (ch3cooh) is 1.8 x 10-5.

Calculate the ph of a 0.50 m solution of sodium acetate (nach3coo) given that the ka of acetic acid (ch3cooh) is 1.8 x 10-5.

What would happen to temperatures on the Earth if the Sun’s heat were not distributed throughout the atmosphere?

What would happen to temperatures on the Earth if the Sun’s heat were not distributed throughout the atmosphere?

A solution containing 28% acid is to be mixed with a solution containing 40% acid to make 300 gallons of a solution Containing 36% acid. how much of each solution should be used

A solution containing 28% acid is to be mixed with a solution containing 40% acid to make 300 gallons of a solution Containing 36% acid. how much of each solution should be used

Compound a has the formula c9h19cl. b is a c9h19br compound. a and b undergo base-promoted e2 elimination to give the same alkene c as the major product as well as different minor products. c reacts w

Compound a has the formula c9h19cl. b is a c9h19br compound. a and b undergo base-promoted e2 elimination to give the same alkene c as the major product as well as different minor products. c reacts with one molar equivalent of hydrogen in the presence of a palladium catalyst to form 2,6-dimethylheptane. addition of hcl […]

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