Stuviascores

How does internal fertilization facilitate life on land? - ANSWERInternal fertilization allows the sperm to reach the egg without either gametes drying out If a hermaphrodite self-fertilizes will the offspring by identical to the parent? Explain? - ANSWERNo. Owing to random assortment of chromosomes during meiosis the offspring may receive the same copy or different copies of a particular parental chromosome from the sperm and the egg. Furthermore, genetic recombination during meiosis will re...

Imagine a group of wild turkeys. Some can run faster than others and so can escape their predators better. This process is called - ANSWERnatural selection What is the correct order for organization of life from smallest to largest? - ANSWERmolecule, organelle, cell, organism, population, community The statement DNA --> mRNA --> protein is referred to as - ANSWERthe Central Dogma True or false? A scientist is more certain of a theory than a hypothesis. - ANSWERtrue Because a wa...

During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement is most likely to be helpful in correcting this student's misconception? - ANSWERCharacteristics acquired during an organism's life are generally not passed on through genes. Charles Darwin was the first person to propose - ANSWERa mechanism for evolution that was supported by evide...

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Consider a neutral atom with 30 protons and 34 neutrons. The number of electrons in this atom is? A. 30 B. 32 C. 34 D. 64 E. 94 - ANSWERA. 30 Identify the noble gas in the following list. A. oxygen B. Helium C. Chlorine D. Gold E. Nitrogen - ANSWERB. Helium The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as. A. deposition B. evaporation C. melting D. Boiling E. sublimation - ANSWERB. Evaporation Which...

Any ionic compound containing group IA or NH4+ cations are.... - ANSWERAlways Soluble Ionic compounds containing NO3-, NO2-, ClO3-, ClO4-, C2H3O2-, & HCO3- anions are - ANSWERAlways Soluble Ionic compounds containing Cl-, Br-, & I- anions are soluble EXCEPT when combined with... - ANSWERAg, Hg, and Pb cations Ionic compound containing SO4^2- are soluble EXCEPT when combined with... - ANSWERAg, Hg, Pb, Ca, Sr, Ba Ionic compounds containing So3^2-, S^2-, CO3^2-, PO4^3-, CrO4^2-, & CrO7...

Length - ANSWERmeter (m) Mass - ANSWERkilogram (kg) Time - ANSWERsecond (s) Temperature - ANSWERKelvin (K) Amount of Substance - ANSWERmole (mol) Electric Current - ANSWERampere (A) Luminous Intensity - ANSWERcandela (cd) Standard Platinum-Iridium Cylinder - ANSWERthe mass is defined by an artifact ( Standard Platinum-Iridium Cylinder ) Derived Units - ANSWERa combination of basic units Liter (L) 1 L = 1000 cm3 Significant Figures - ANSWERrepresents the precision in ...

Name the 6 polar aprotic solvents - ANSWERacetone, acetonitrile, DMSO, DMF, HMPA, THF Name the 5 polar protic solvents - ANSWERacetic acid, ethanol, formic acid, methanol, water ______ and ______ mechanisms are two step reactions that have _____ intermediates. - ANSWERSN1; E1; 2 Intermediates each ______ and ______ mechanisms are one step reactions that have _____ intermediates. - ANSWERSN2; E2; 1 Intermediate each Allylic - ANSWERresonance stabilized (carbon bonded directly to a C=C...

Matter - ANSWERAnything that has mass and occupies space Chemistry - ANSWERThe study of composition of matter and the changes that matter undergoes Organic Chemistry - ANSWERThe study of compounds containing carbon Inorganic Chemistry - ANSWERStudy of substances that do not contain carbon Biochemistry - ANSWERArea of chemistry that focuses on processes that take place in organisms Analytical Chemistry - ANSWERArea of chemistry that focuses on the composition of matter Physical ...

anode - ANSWERIn electrophoresis, the electrode having a positive charge is the: a) indicating electrode b) anode c) reference electrode d) cathode Sodium fluoride - ANSWERWhich of the following additives is recommended for preservations of glucose in blood samples to prevent glycolysis? a) Citrate b) Heparin c) Sodium fluoride d) EDTA Insulin - ANSWERWhich of the following hormones acts to lower the concentrations of glucose in the blood? ...

In general, when is electromagnetic radiation produced? - ANSWERWhen charged particles move. According to the Bohr model of the atom, the single electron of a hydrogen atom circles the nucleus..how? - ANSWERIn specific, allowed orbits. All orbitals within the p sublevel.. - ANSWERare at the same energy and have the same shape What is true about microwave ovens? - ANSWERMicrowave ovens heat food by rotating water molecules Visible light, X rays, infrared radiation, and radio waves all...

Density - ANSWERmass/volume Law of Conservation of Mass - ANSWERmass reactants= mass products Law of Multiple Proportions - ANSWERatoms combine in fixed whole # ratios Alkali metals - ANSWERGroup 1 metals Alkaline earth metals - ANSWERGroup 2 metals Transition metals - ANSWERelements in groups 3-12 mol - ANSWER6.022x10^23 Limiting reactant - ANSWERreactant that's completely used up in a chemical reaction excess reactant - ANSWERreactant which doesn't get used up complet...

Scientific notation - ANSWERthe term for a method of expressing numbers by moving the decimal places after the first significant digit and indicating the number of decimal moves by a power of 10 cm^3 - ANSWERa unit that expresses the volume occupied by a cube 1 centimeter on each side. density - ANSWERThe amount of mass in a unit volume. gas - ANSWERa physical state described as having a variable shape and a variable volume. compound - ANSWERThe term for a pure substance that can be ...

Aufbau Principle - ANSWERelectrons fill the lowest energy orbitals first Hund's rule - ANSWERwhen there are two or more orbitals of the same energy available, electrons will go into separate orbitals before pairing up Valance electrons - ANSWERelectrons on the outermost shell of an atom Covalent bonds - ANSWERelectrons are shared between atoms to complete their octet Common bonding pattern of Carbon - ANSWER4 bonds, 0 lone pairs Common bonding pattern of Nitrogen - ANSWER3 bonds,...

Lab Safety Rules of Science - ANSWER-Add acid to water because if you add water to acid, it can boil over and explode. -Wear goggles with side shields to protect your eyes. -Reagents-Container -It is not safe to eat, drink or put on makeup because it can contaminated. -Hold the specimen at a safe distance and wafe the chemical. DO NOT SMELL THE CHEMICAL! -Wear long sleeves, old clothes, long pants and aprons. -Long hair-Tie back long hair Jewelry-Take off all jewelry and watches Contact ...

Diatomic 7 - ANSWERH, N, O, F, Cl, Br, I Density Formula - ANSWERMass/volume 1 Mole Measurement - ANSWER6.02 x 10^23 1 Mole of Gas At STP - ANSWER22.4 L Standard Temperature - ANSWER0C/273K Standard Pressure - ANSWER101.3kPa/14.7psi/760 mm Hg/29.92 in Hg Molarity (M) - ANSWERMoles solute/L solution molality (m) - ANSWERmoles solute/kg solvent SI Base Unit - Length - ANSWERMeter (m) SI Base Unit - Mass - ANSWERKilogram (kg) SI Base Unit - Time - ANSWERSecond (s) S...

Which of these properties is the best one to use for identification of an element? the number of neutrons in the atomic nucleus the number of protons in the atomic nucleus the number of isotopes that are formed by the element the number of charges on ions of the element - ANSWERB. the number of protons in the atomic nucleus Which characteristic best identifies an Arrhenius base? It must donate electrons to form a covalent bond. It must accept protons from an acid. It must generate hydr...

What is a pure substance? - ANSWERsubstance made of one element What is a mixture? - ANSWERcombo of pure substances What is a homogenous substance - ANSWERevenly distributed particles at microscopic level Hetergenous - ANSWERparticles are not evenly distributed at the microscopic level - usually can see different particles What are chemical properties? - ANSWERCharges forming compounds reacts inert or not burning What are physical properties? - ANSWERState (solid, liquid, gas)...

Which hydrocarbon is 84.1% carbon by mass? (A) CH4 (B) C2H6 (C) C4H10 (D) C8H18 - ANSWER(D) C8H18 Lithium hydrogen carbonate, LiHCO3, decomposes when heated to form Li2O, CO2, and H2O. How many moles of H2O are formed when 0.50 mol LiHCO3 decomposes? (A) 0.25 mol (B) 0.50 mol (C) 0.75 mol (D) 1.0 mol - ANSWER(A) 0.25 mol A vessel contains 66 g CO2 and 16 g O2 at a pressure of 10.0 atm. What is the partial pressure of CO2? (A) 5.0 atm (B) 6.0 atm (C) 7.5 atm (D) 8.0 atm - ANSWER First...

Chemistry - ANSWERScience that deals with the structure and properties of substances and with the changes that they go through; how things are built and how we change them Inorganic chemistry - ANSWERChemistry of everything non-carbon containing Organic chemistry - ANSWERChemistry of carbon-containing compounds Biochemistry - ANSWERChemistry of living organisms Physical Chemistry - ANSWERStudy of physics applied to chemistry Analytical Chemistry - ANSWERStudy of the analysis techn...