A nucleotide is composed of a(n) _____. phosphate group, a nitrogen-containing base, and a five-carbon sugar amino group, a nitrogen-containing base, and a five-carbon sugar sulfhydryl group, a nitrogen-containing base, and a five-carbon sugar glycerol, a nitrogen-containing base, and a five-carbon sugar phosphate group, a nitrogen-containing base, and a hydrocarbon
A certain ionic compound is made entirely of aluminum and oxygen. part a what is the formula for this compound?
Methanol (CH3OH) has a heat of fusion of 3.16 kJ/mol. Which of the following is the heat of solidification that occurs when 63 grams of liquid methanol freezes?
Which of the following pairs share the same empirical formula? CH4 and C2H4 PbCl2 and PbCl4<----- my answer, correct? NO2 and N2O4 C2H6 and CH4
The symbol for a radioactive nuclide is mc027-1.jpg. Which statement is correct? The atomic number of the radioactive nuclide is 90. The mass number of the radioactive nuclide is 144. The number of neutrons that are present in the nucleus of each atom is 324. The number of protons that are present in the nucleus of each atom is 234.
Which of the following compounds is a structural isomer of butane? a. 2-methylbutane c. 2-methylpropane b. 2,2-dimethylbutane d. 2,2-diethylpropane
What are the weakest attractions between molecules? a. ionic forces c. covalent forces b. Van der Waals forces d. hydrogen forces
Which of the following is a property of sodium hydroxide? feels slippery. releases H3O+ in an aqueous solution. turns litmus paper red. reacts with Mg to produce H2 gas. tastes sour.
Which is a correct set of values of m for one of the subshells of n = 2? –1, 0, 1 –1, –2, 0, 1, 2 –1, –2, –3, 0, 1, 2, 3 –1, –2, –3, –4, 0, 1, 2, 3, 4
According to the law of conservation of energy, what will most likely happen in a closed system? Energy will be exchanged along with matter. Energy will be exchanged, but matter will not be exchanged. Energy will be created along with matter. Energy will be destroyed, but matter will not be destroyed.
A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the molarity of the solution? Show your work.
The process of water vapor changing to a liquid is called ____. a. evaporation c. condensation b. precipitation d. convection
Which of the following statements is not true of the combustion of an organic compound? A. oxygen gas (O2) must be one of the reactants B. energy is released by the reaction C. it can also be described as a synthesis reaction D. carbon dioxide (CO2) will be produced
In which level of the atmosphere is Ozone concentrated? A. TroposphereB. Stratosphere C. MesophereD. Thermosphere
Which best explains why blood is considered to be a suspension? A)It has nutrients that cannot be dissolved b)It contains particles that can settle out. C)It has nutrients that are dissolved in its liquid portion. D)It contains particles that mix on a molecular level.
1. Which of the following can take the shape of the container it is in but has a fixed volume?. . A. argon gas. B. liquid bromine. C. solid water. D. hydrogen plasma. 2 . In which of these samples do the molecules have the greatest kinetic energy? A. solid ice (-25 °C). B. water vapor (102°C). C. ice water (0°C). D. liquid water (54°C).
Which compounds are classified as electrolytes? (1) KNO3 and H2SO4 (2) KNO3 and CH3OH (3) CH3OCH3 and H2SO4 (4) CH3OCH3 and CH3OH
A certain ionic compound is made entirely of aluminum and oxygen. part a what is the formula for this compound? express your answer as a chemical formula.
Which statement is true about radiocarbon dating? After it dies, an organism’s body continues to intake C-14. Radiocarbon dating is useful for dating objects up to 100,000 years old. Radiocarbon dating assumes that half-life for radioisotopes change over time. The half-life of C-14 is 5,730 years.
Which statement correctly defines dynamic equilibrium? At dynamic equilibrium, the rates of forward and reverse reactions are equal. At dynamic equilibrium, the rate of the forward reaction is higher than the rate of the reverse reaction. At dynamic equilibrium, the forward and reverse reactions stop. At dynamic equilibrium, the concentrations of reactants and products are equal.
I WILL MARK BRAINLIEST!!!! Which of the following best describes used nuclear fuel rods? a.Used nuclear fuel rods are not radioactive. b.Used nuclear fuel rods are useful for industry. c.Used nuclear fuel rods remain radioactive for one year. d.Used nuclear fuel rods are stored under very strict conditions.
Which best compares and contrasts how john newlands and dmitri mendeleev organized elements? both newlands and mendeleev arranged elements according to their chemical properties, but only newlands used atomic mass as well. both newlands and mendeleev arranged elements according to their atomic masses, but only mendeleev used chemical properties as well. both newlands and mendeleev organized elements into groups, but only newlands used a table with rows and columns. both newlands and mendeleev organized elements into a table with rows and columns, but only mendeleev named different groups of elements.
Materials of low mass are combined to form a substance of higher mass during ____. a. fission c. both A and B b. fusion d. neither A nor B
Which factor causes water to form small drops on a waxy surface? van der Waals forces hydrogen bonding London dispersion forces ionic bonding