Posted in Chemistry

Please login to view the answer

Login
Join us

Related Questions

Posted in Chemistry

How many molecules (not moles) of NH3 are produced from 5.01×10−4 g of H2?

Please login to view the answer

Login
Join us

Posted in Chemistry

A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to rise? The molecules in the water move closer together. The molecules in the thermometer’s liquid spread apart. The kinetic energy of the water molecules decreases. The kinetic energy of the thermometer’s liquid molecules decreases

Please login to view the answer

Login
Join us

Posted in Chemistry

Which statement is correct about honey? It contains disaccharides, a complex type of lipid. It contains monosaccharides, the simplest carbohydrate. It contains starch, which gives it a sweet taste. It contains lipids, which give it a sweet taste.

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which of the following characterizes the sodium-potassium pump? A) Sodium ions are pumped out of a cell against their gradient. B) Potassium ions are pumped into a cell against their gradient. C) The pump protein undergoes a conformational change. D) Only A and B are correct. E) A, B, and C are all correct.

Please login to view the answer

Login
Join us

Posted in Chemistry

Which prediction about a methane molecule would most likely be made by using both the quantum model of the atom and John Dalton’s model? When the molecule reacts, new atoms are created. The molecule contains different kinds of atoms. The nucleus is located in the center of the molecule. Electrons are located at specific locations in the molecule.

Please login to view the answer

Login
Join us

Posted in Chemistry

Most reactions between an acid and a base form a salt and water. Which describes an acid-base reaction? A. synthesis B. decomposition C. double-replacement reaction D. single-replacement reaction

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Chlorophyll a is one of the green pigments found in plants. Chlorophyll a has the molecular formula C55H72MgN4O5. How many atoms are in this molecule? A)136 B)137 C)138

Please login to view the answer

Login
Join us

Posted in Chemistry

Henry plans to monitor the change in concentration of an acid during a chemical reaction. He wants to collect data every 0.1 seconds and then to graph his data and insert it into a text document. Which pair of tools would be best for Henry to use? a computer and pH paper pH paper and a graphing calculator a computer and a concentration probe a graphing calculator and a concentration probe

Please login to view the answer

Login
Join us

Posted in Chemistry

A reaction produces 0.883 moles of H₂O. How many molecules are produced?

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

A scientist wants to test how much of an acid can be added to a solution before the pH of the solution changes to below a certain point. The starting pH of the solution is 6.0, and the scientist wants to know when the pH of the solution changes to below 5.0. Which pH indicator should the scientist use? A.Phenolphthalein, which changes from colorless to purple around a pH of 8.3 B.Cresol red, which changes from yellow to purple around a pH of 7.2 C.Congo red, which changes from red to violet around a pH of 5.0 D.thymolphthalein, which changes from colorless to blue around a pH

Please login to view the answer

Login
Join us

Posted in Chemistry

A substance that yields an anion plus a hydrogen ion is a(n) _____. salt acid base

Please login to view the answer

Login
Join us

Posted in Chemistry

Which diatomic molecule is formed when the two atoms share six electrons

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which molecule contains hydrogen bonding between its molecules? A)NH3 B)CaH2 C) CH4

Please login to view the answer

Login
Join us

Posted in Chemistry

Plasma is often in stars, which are likely to contain A) elements B) ions C) molecules D) neutrons

Please login to view the answer

Login
Join us

Posted in Chemistry

Which contains more molecules of water, 4.55 cm3 of ice (0.917 g/cm3 ) at 0◦C or 4.55 cm3 of liquid water at 0◦C? 1. the ice 2. the liquid? How many more molecules? Answer in units of molec. I know its the liquad water but how do I find how many more molecules there are I did: m/v=d for ice and liquad water ice mass= 0.917*5= 4.585 liquad water mass= .9998*5= 4.995 then subtracted 4.995-4.585= .41 and converted g to mol= .02277*6.022×10^23= 1.3716E22 but its wrong!!

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

The bonding of two amino acids to form a larger molecule requires the addition of nitrogen the release of carbon dioxide the release of a water molecule the addition of a water molecule

Please login to view the answer

Login
Join us

Posted in Chemistry

How to find the number of moles in a molecule of water

Please login to view the answer

Login
Join us

Posted in Chemistry

Which statement is correct about honey? It contains disaccharides, a complex type of lipid. It contains monosaccharides, the simplest carbohydrate. It contains starch, which gives it a sweet taste. It contains lipids, which give it a sweet taste.

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

How many molecules are there in 122 grams of Cu(NO3)2?

Please login to view the answer

Login
Join us

Posted in Chemistry

Indicate whether the following are acidic, basic, or neutral solution A. [H2O+]=6.0×10^-12 B. [H3O+]=1.4×10^-9 C. [OH-]=5.0×10^-12 D. {OH-]=3.5×10^-10

Please login to view the answer

Login
Join us

Posted in Chemistry

Draw a complete Lewis structure for the conjugate acid of nitromethane that shows all bonds, unshared electron pairs, and minimized formal charges, where appropriate.

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which contributes to the dissolution of sugar in water? a. the dissociation of an ionic compound in water b. a strong pull of water molecules on an ionic compound c. the dissociation of a polar covalent compound in water d. a strong pull of water molecules on a polar covalent compound

Please login to view the answer

Login
Join us

Posted in Chemistry

Which of the following is not an example of a polymer? Plastic Nylon Amino acid Polystyrene

Please login to view the answer

Login
Join us

Posted in Chemistry

The four fundamental types of organic molecules are nucleic acids, proteins, lipids, and Blank Space __________. A.phosphates B.nitrates C.sulfates D.carbohydrates

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which of the following molecules has correctly labeled bond dipoles?

Please login to view the answer

Login
Join us

Posted in Chemistry

Which kind of substance accepts an electron pair? base hydroxide ion acid alkali

Please login to view the answer

Login
Join us

Posted in Chemistry

What kind of bond is created by a weak electrical attraction between polar molecules

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which of the following is not an example of a polymer? Plastic Nylon Amino acid Polystyrene

Please login to view the answer

Login
Join us

Posted in Chemistry

Sugars such as glucose, fructose, and ribose are examples of _______. A. proteins B. nucleic acids C. carbohydrates D. lipids

Please login to view the answer

Login
Join us

Posted in Chemistry

What property do atoms of these elements have that helps make the molecules polar

Please login to view the answer

Login
Join us

Online Tutors To Help You