Biomolecules Questions and Answers

11 How many of each kind of atom is in one molecule of water O O O 2 hydrogen atoms and 1 oxygen atom 1 hydrogen atom and 2 oxygen atoms 2 hydrogen atoms and 2 oxygen atoms 1 hydrogen atom and 1 oxygen atom

True or false If you are measuring a child s temperature you are measuring how fast molecules are moving in that child s body True False QUESTION 10 True or false When you stir sugar into your morning coffee the sugar is acting as a solvent O True False

Lemon Milk Blood 0006 Milk Tomato Tablets Soap Drain Cleaner 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Acidic Neutral Alkaline Which of the following substances would be most likely to give protons H into a solution Baking soda Vinegar Bleach Blood

Be Ma Mo Ca RD Gr Ba Ra Sc Cr Mn Zr Nb Mo Hf Ru Rh Pd W Re Os Rf Db Sg Bh Hs Nd Pm Sm Eu Go 24 Cr Chromium 51 996 In the example above chromium what does the number 24 indicate This number tells you the atomic mass of the element O This number indicates how many isotopes are possible

Question 1 What coefficient must be added to the carbon in the reactants to balance the following equation Na CO 1 C s 2 Na g 3 CO g 05 04 02 Points 2

Question 3 Points 3 Select the skeleton equation for the reaction Ethane Oxygen Carbon dioxide Water OC H6 02 CO2 H O CH 02 C H 0 20 H 70 4CO 6H O OC H O CO H O

Question 9 CuO H CUH CuZH2 O Cu Points 1 CU2 H O Fill in the blank

Question 10 Points 1 Below is the word equation for the reaction between sodium hydroxide and hydrochloric acid Identify the reactant s in the reaction Sodium hydroxide Hydrochloric acid Sodium chloride Water Q Hydrochloric acid Sodium chloride and water O Sodium hydroxide and hydrochloric acid Water

uestion Which of the following is correct for a chemical equation Reactants products O Reactants products rightarrow Products reactants O Products rightarrow Reactants Reactants rightarrow Products

Question 4 Points 1 When a new substance is formed with physical and chemical properties different from the original substance it is called a O chemical change Ophysical change phase change both a physical change and a chemical change

Pick the odd one out O HCl aq NaOH aq NaCl aq H2O 1 O HCl aq 2NaOH aq NaCl aq 2 H20 1 OHCl aq 2NaOH aq 2 NaCl aq H 2 O 1 O2 HCl aq NaOH aq NaCl aq 2 H2O 1

Question 8 Points 2 10 g of NaOH is dissolved in 125 mL water Which among the following is a correct statement O A physical change has taken place No change occurred O A chemical change has taken place All of the choices

GradeResults co g O2 g 2002 g What is the balanced chemical equation for this reaction 1 bath House O200 g 202 g 2002 8 O CO g O2 g CO 2 g My Activities Tell me what you want to Row Diamond W 8 0 co COL A

Which of the following properties is NOT a physical property of a satin cloth It is soft It burns It is shiny It is smooth

Question 10 Points 2 Which of the following is a chemical change Clothes drying in a dryer Melting of an ice cube Chopping wood Boiling an egg

The metals are characterized by O low density O high electronegativity O low electronegativity O low conductivity www

Classify the following as metals or nonmetals Halogens alkalis noble gases and alkaline earths O Alkalis alkaline earths metals halogens noble gases nonmetals O Alkalis alkaline earths nonmetals halogens noble gases metals O Alkaline earths nonmetals alkalis halogens noble gases metals O Halogens alkaline earths metals alkalis noble gases nonmetals

Question 2 Points 2 Which of the following is responsible for metallic bonding Core electrons ONeutrons Protons Conduction electrons

Question 7 Points 1 What electrons are involved in ionic bond formation Op electrons Os electrons Core electrons Valence electrons

Question A n Points 2 has electro negativity difference less than 1 2 between bonded atoms O ionic compound covalent compound O metallic compound polar covalent compound

GradeResulls Question 6 Points 2 Metals have the properties of ductility which shows My Activities Tell me what you want to do Q the ability of a substance to be stretched the ability of a substance to be bent O the ability of a substance to be broken the ability of a substance to be melted

Question 10 Points 2 Which of the following compounds contain covalent bond O C6H1206 OMg0 AKC13 LIF

Question Which of the following ions have names ended with ide O Metal ions O Polyatomic cations O Monatomic cations O Monatomic anions

dentify the element that can gain one electron O Br O O OS OC

Chemical formula of hydrochloric acid is OHCI O HCIO O HdOz HCIO3

deResulls My Activities The molar mass of an element is the mass of one atom gram O mole Oliter Tell me what you want to do Q 101 Dalmatians City of the element

Why are organ systems so important to understand How can learning about animal organ systems help you in your future

Question 3 Points 2 Which of the following is a binary ionic compound NH3 O H O O co O Coch

bath House Grade Results My Activities Tell me what you want to do Q Which of the following represents the number of moles of chloride ion in 47 5 g of MgCl O 1 5 mol O 1 mol 0 5 mol 2 mol 1 Row Diamond W101 Dalmatians City 10k Yellow Gols

Periodic Table Unit Test Question 7 Which of the following dimensional analysis set up is correct to convert mass of sulfur to atoms of sulfur O Points 2 O 10 0 g Sx 10 0 g S x 10 0 g S x 100 gsx 6 02 x 10 1 0 g S atoms S 1 mole S 32 07 g S 1 mole S 32 07 g S x 1 atom S 6 02 x 10 moles S 6 02 x 103 atoms S 1 mole S 6 02 x 10 atoms S

Which of the following statement is correct regarding metalloids O Metalloids are good conductors O Metalloids are poor conductors O Metalloids are semiconductors O Metalloids are insulators

The similarity between Ernst Rutherford s and Niels Bohr s model of the atom is that they contain and orbit the nucleus respectively O a nucleus negatively charged protons O a nucleus negatively charged electrons O a nucleus negatively charged neutrons a nucleus negatively charged atoms

The atomic model changed from time to time This is because Oscientists discussed their ideas with each other O more evidence is available through various experiments O the atom has changed with time O the discovery of more elements

Points 2 Which of the following is used to measure objects O Computer simulations O Metric ruler Stopwatch Thermometer

Which of the following numbers has four significant figures 1 0 001209 II 2 450x104 III 12079 IV 0 000002023 OI and II O III and IV O I II and IV

Which of the following statements is NOT correct about SI units O The SI unit of time is second O The SI unit of mass is kilogram The SI unit of temperature is candela The SI unit of length is meter

molecules can only vibrate and rotate in a fixed position A solid s O A liquid s Gas O Plasma

Quest is the conversion of water vapor into ice without a liquid phase O Liquefaction O Sublimation O Crystallization My Activities Tell me what you want to do Q Condensation

Question 2 Points 1 The product of density and volume of a liquid is used to find the O Surface tension O Temperature O Pressure Mass of the liquid

Combined Gas Law equation is represented by O T1 P1V1 T2 P2V2 O P V1 T1 P2V2 T2 OP1V1 T1 P2V2 T2 PV nRT

Question 7 The molar mass of Potassium dichromate K Cr O7 is O 294 g mol O 194 g mol 492 g mol 140 g mol

Which of the following is the gradient for the following hill LEO 3 5 5 3 03 25 m 15m

Question 4 Points 2 Which of the following equations can be used to solve volume of a solution using molarity equation O Volume moles molarity Volume molest molarity Volume moles molarity Volume moles x molarity

Points 3 Question 8 Which of the following conversions is correct O 0 5 dollar 50 pennies O 0 5 dollar 20 nickels 0 5 dollar 20 dimes O 0 5 dollar 8 quarters

III Color change on heating IV Formation of starch iodine complex O I II and III My Activities Question 5 Points 3 Which of the following observations indicates a chemical change in the identification of an unknown substance 1 Bubble formation II Electrical conductivity O II III and IV OI III and IV Tell me what you want to do Q a

In the diagram shown below homogeneous mixture s 10000 OLI 100 000000 6000 000 1 II and III 11 and 11 800 00 00 III 00 60 is are a heterogeneous mixture s and is are a

Which of the following statements is TRUE O All substances are not composed of atoms O Elements are not pure substances Matter is classified into elements compounds and mixtures Elements are classified into metals and metalloids

Which of the following is an element a Cyp b d tal b Water c Carbon dioxide d Ethanol

GradeResults My Activities In which state of matter do particles move freely O Solid O Liquid Gas All of these Tell me what you want to do men

GradeResults My Activities When a gas is converted into a liquid it is called O condensation O evaporation O sublimation Tell me what you want to di solidification