Which of the following resources in natural, biotic, and exhaustible? A. Silk b. Forests c. Minerals b.water
1: Write balanced complete ionic equation for NaOH(aq)+HNO3(aq)?H2O(l)+NaNO3(aq) 2? Write balanced net ionic equation for Na3PO4(aq)+NiCl2(aq)?Ni3(PO4)2(s)+NaCl(aq) 3? Write balanced complete ionic equation for Na3PO4(aq)+NiCl2(aq)?Ni3(PO4)2(s)+NaCl(aq)
Which of the following describes nuclear fission? A. An electron is ejected when a neutron becomes a proton. B. A high-energy gamma ray is released from a nucleus. C. A parent element splits into two daughter elements. D. Two separate nuclei are joined to become one nucleus.
In the end, businesses that use teams tend to have ______. a. Fewer sick leaves b. More profits c. More management d. Fewer products
Which of the following solutions will not neutralize a weak base solution of pyridine (C5H5N)? vinegar ammonia carbonated soda drink pickle juice
What causes the difference in bond angles in carbon dioxide and water? A) the distance between the atomsin either molecules B) the facr that there are tei oxygen atoms in carbon dioxide and only one in water C) the fact that the number of lone pairs of electrons on the central atom is greater in the case of water D) the presence of a carbon atom in carbon dioxide E) the presence of a hydrogen atom in water
What is the term for the dissolving medium in a solution? A.) solvent B.) solute C.) solvator D.) emulsifier
Which type of force is found between difluorine (F2) molecules? A Ionic bonding B Dipole-dipole interaction C London dispersion forces D Hydrogen Bonding
Which type of biochemical is shown in the diagram? polysaccharide nucleic acid lipid dipeptide Download jpg
Which statement about proteins is true? A.) Collagen is a structural protein and hemoglobin is a protein involved in the transport of oxygen. B.) Glycogen is a structural protein and collagen is a protein involved in the transport of oxygen. C.)Glycogen is a structural protein and hemoglobin is a protein involved in the transport of oxygen. D.)Hemoglobin is a structural protein and collagen is a protein involved in the transport of oxygen.
A _____reaction is a process by which atoms change their ion charge. displacement redox substitution combustion
Which bond pair does not have a polar covalent bond? A. P – Cl B. B. O – H C. S – Cl D. H – Cl E. E. Cl - Cl
Which of the following is not an example of a polymer? Select one: a. Polystyrene b. Nylon c. Sucrose d. PVC
Which of the following would most likely contain a fossil? intrusive igneous rock extrusive igneous rock chemical sedimentary rock organic sedimentary rock
Copper is an example of a(n) A. renewable resource. B. gemstone. C. consumption resource. D. nonrenewable resource
Which best describes ionization energy? energy needed to add an electron to a neutral atom in the gas phase energy needed to add an electron to a neutral atom in the liquid phase energy needed to remove an electron from an atom or ion in the gas phase energy needed to remove an electron from an atom or ion in the liquid phase
Consider the following balanced reaction between hydrogen and nitrogen to form ammonia: 3H2(g) + N2(g)→2NH3(g) How many moles of NH3 can be produced from 24.0 mol of H2 and excess N2?
The formation of which product(s) will most likely be observed in a combustion reaction? an oxide one element and one compound an element two ionic compounds
1) The elements most likely to form more than one type of ion are the ______. A) transition metals. B) alkali metals. C) halogens. D) alkaline earth metals. 2) The name iron(11) indicates that a compound contains _______. A) iron ions with an 11+ charge. B) iron ions with a 2+ charge. C) iron ions with a negative charge. D) two types of iron ions.
Solutes usually dissolve best in cold solvents. please select the best answer from the choices provided t f
Which characteristics of metal atoms help explain why valence electrons in a metal are delocalized? Metal atoms are large and have high electronegativities. Metal atoms are small and have low electronegativities. Metal atoms are large and have low electronegativities. Metal atoms are small and have high electronegativities.
PLEASE HELP I WILL GIVE YOU 50 POINTS Which of the following aqueous solutions will have the lowest vapor pressure at 25°C? 1.5 M C6H12O6 1.5 M LiNO3 1.0 M Al2O3 1.0 M CaF2
In a solution of salt and water, which component is the solute? A. salt B. water C. beaker D. oxygen
1.The atmospheric gas that forms a mild acid when dissolved in water is _____. carbon dioxide oxygen aluminum sulfur 2. What would cause the inscription on a marble gravestone to become harder and harder to read over time? frost wedging mechanical weathering exfoliation chemical weathering 3. Which of the following is NOT a factor that affects the rate of weathering in rocks? biological evolution climate rock characteristics amount of exposed surface area
Which radioisotope is used as a tracer in nuclear scanning? carbon -14 uranium-238 technetium-99m iodine-129
Which is most likely why many scientists reject the cold fusion theory? There is too much waste involved in the process. Cold fusion experiments have been conducted at room temperature only. The process does not produce enough energy to meet the needs of modern humans. The original results have not been replicated consistently and reliably.
Which of the following statements is not accurate in regard to the first four energy levels? A. The third energy level can hold a maximum of 18 electrons. B. The fourth energy level is the only energy level to hold an f sublevel. C. An orbital can hold a maximum of two electrons. D. The first energy level has 1 p orbital