21.) Which answer best describes the type of solid that is depicted in the micrograph below?
22.) How many atoms are there per unit cell for each of the pure elemental metals listed below?
24.) If the atomic radii of cobalt is 125.1 pm and the atomic mass of cobalt is 58.934 g/mol, what is the theoretical density of cobalt metal in g/cm^3?
25.) Vandium metal has a density of 6.08 g/cm^3 and a molar mass of 50.94 g/mol. Calculate the atomic radii of vandium in pm.
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21.) Which answer best describes the type of solid that is
depicted in the micrograph below?...
Question 8 (1 point) Vanadium (50.9 g/mol) is a metal that under normal conditions crystallizes in...
Question 8 (1 point) Vanadium (50.9 g/mol) is a metal that under normal conditions crystallizes in a body- centered cubic lattice and has a density -6 g/cm3. If instead vanadium were to crystallize in a simple cubic lattice, calculate the new density. The atomic radius of vanadium is 205 pm. HINT: First, calculate the edge length of a simple cubic cell from the atomic radius (1 suggest converting to cm at this step). Second, calculate the volume of the unit...
1) Cite the difference between atomic mass and atomic weight. 2) Without consulting any figures or...
1) Cite the difference between atomic mass and atomic weight. 2) Without consulting any figures or tables, determine whether each of the electron configurations given below is an inert gas, a halogen, an alkali metal, an alkaline earth metal, or a transition metal. Justify your choices. (a) 1s22s22p63523p63d7452 (d) 1s22s22p6352 (b) 1s22s22p63s23p6 (e) 1s22s22p63s23p63d2452 (C) 1s22s22p5 (1) 1s22s22p63523p6451 3) (a) What type(s) of bonding would be expected for each of the following materials; brass (a copper- zinc alloy), rubber, barium...
A metal with a molar mass of 192.22 g mol-1 and an atomic radius of 1.80 x 102 pm packs in a face...
A metal with a molar mass of 192.22 g mol-1 and an atomic radius of 1.80 x 102 pm packs in a face centred cubic structure. Calculate the density of the metal in units of g cm 3 A mineral has the unit cell shown below contains nitrogen,lithium and boron. Determine the empirical formula of the mineral. B atoms are the nine smallest spheres on the corners and in the body - centre Li atoms are the fourteen medium spheres...
answer it all please BS132 Experiment 3 2018-2019 The limiting reagent is the reagent which will...
answer it all please
BS132 Experiment 3 2018-2019 The limiting reagent is the reagent which will completely react and so iIs excess. It will therefore be the reagent for which a lower number o present. Compare the respective molar proportions of the reagents used A and B above] and deduce which is the limiting reagent not in f moles are Igiven by Limiting reagent = 1 mark Scale of reaction (i.e. number of moles of limiting reagent used) - mol...
Lab Report Guide: - 1. Results (4 pts) o Tables neatly filled out with data o ...
Lab Report Guide: - 1. Results (4 pts) o Tables neatly filled out with data o Proper significant figures o Legible sample calculations - 2. Error Analysis (4 pts) o Determination of percent error (for glassware and metal densities) o Typed discussion of measured results vs literature results and description of possible sources of error. Note that “human error” is not an acceptable answer. Please be specific. - 3. Post Lab Questions (4 pts) o Hand written answers to the...
please answer all Question 19 1.5 pts Which of the following molecules contains a smallest bond...
please answer all
Question 19 1.5 pts Which of the following molecules contains a smallest bond angle between two fluorine atoms? SiF4 BF3 Oo ooo CF4 KrF4 NF3 Question 14 1.5 pts Arrange the following species in increasing size: AI, Al3+, S, and S2- 52- <Al<S<A13+ A13+ < Al<S<S2 S<A13+ < Al< 52 52- < Al< A13+ <S A13+ <$< Al < 52 Question 12 2 pts You have the six pieces of metal listed below, plus a beaker of...
if you can't answer all ,please don't answer 1) of the reactions below, which one is...
if you can't answer all ,please don't answer
1) of the reactions below, which one is a decomposition reaction? A) Ca(NO3)2 + Na2S -- CdS +2NaNO3 B) NH4Cl- NH3 + HCI C) 2Mg + 02 - 2MgO D) 2N2 + 3H2 → 2NH3 E) 2CH4 + 402 - 2002 + 4H20 miches of - x 1? 2 2) Calculate the percentage by mass of ammonia in cisplatin, PtCl2/NH3 12. A) 12.53 B) 5.68 C) 18.09 D) 11.35 E) 4.67 3)...
i need help with 2,4,5,8,9,10-12 6 pts Question 2 A student designs an experiment to test...
i need help with 2,4,5,8,9,10-12
6 pts Question 2 A student designs an experiment to test the hypothesis: "If a solution of sucrose in water has a higher concentration, it will attract more ants." The student makes sucrose solutions with concentrations of 1.00,5.00, 10.50, 20.00 and 25.00% sucrose by mass, then leaves the solutions outside. After some time has passed, the student counts the number of ants that are in each beaker. The independent variable for this experiment is the:...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
answer all questions ral Chemistry Concept 5 pts Question 1 Balance the chemical equation shown below,...
answer all questions
ral Chemistry Concept 5 pts Question 1 Balance the chemical equation shown below, Indicate the stoichiometric coefficients for the reaction. Do not leave answer spaces blank if the coefficient is one (1). AIBrg(aq)+ HBr(aq)- Al(s)+ H2(g) The balanced equation will then be used in the following two questions. 5 pts Question 2 Using the balanced chemical equation from the previous question, how many moles of H2(g) will be formed from 6.24 moles of HBr. Your answer will...
Question 8 (1 point) Vanadium (50.9 g/mol) is a metal that under normal conditions crystallizes in a body- centered cubic lattice and has a density -6 g/cm3. If instead vanadium were to crystallize in a simple cubic lattice, calculate the new density. The atomic radius of vanadium is 205 pm. HINT: First, calculate the edge length of a simple cubic cell from the atomic radius (1 suggest converting to cm at this step). Second, calculate the volume of the unit...
1) Cite the difference between atomic mass and atomic weight. 2) Without consulting any figures or tables, determine whether each of the electron configurations given below is an inert gas, a halogen, an alkali metal, an alkaline earth metal, or a transition metal. Justify your choices. (a) 1s22s22p63523p63d7452 (d) 1s22s22p6352 (b) 1s22s22p63s23p6 (e) 1s22s22p63s23p63d2452 (C) 1s22s22p5 (1) 1s22s22p63523p6451 3) (a) What type(s) of bonding would be expected for each of the following materials; brass (a copper- zinc alloy), rubber, barium...
A metal with a molar mass of 192.22 g mol-1 and an atomic radius of 1.80 x 102 pm packs in a face centred cubic structure. Calculate the density of the metal in units of g cm 3 A mineral has the unit cell shown below contains nitrogen,lithium and boron. Determine the empirical formula of the mineral. B atoms are the nine smallest spheres on the corners and in the body - centre Li atoms are the fourteen medium spheres...
answer it all please
BS132 Experiment 3 2018-2019 The limiting reagent is the reagent which will completely react and so iIs excess. It will therefore be the reagent for which a lower number o present. Compare the respective molar proportions of the reagents used A and B above] and deduce which is the limiting reagent not in f moles are Igiven by Limiting reagent = 1 mark Scale of reaction (i.e. number of moles of limiting reagent used) - mol...
please answer all
Question 19 1.5 pts Which of the following molecules contains a smallest bond angle between two fluorine atoms? SiF4 BF3 Oo ooo CF4 KrF4 NF3 Question 14 1.5 pts Arrange the following species in increasing size: AI, Al3+, S, and S2- 52- <Al<S<A13+ A13+ < Al<S<S2 S<A13+ < Al< 52 52- < Al< A13+ <S A13+ <$< Al < 52 Question 12 2 pts You have the six pieces of metal listed below, plus a beaker of...
if you can't answer all ,please don't answer
1) of the reactions below, which one is a decomposition reaction? A) Ca(NO3)2 + Na2S -- CdS +2NaNO3 B) NH4Cl- NH3 + HCI C) 2Mg + 02 - 2MgO D) 2N2 + 3H2 → 2NH3 E) 2CH4 + 402 - 2002 + 4H20 miches of - x 1? 2 2) Calculate the percentage by mass of ammonia in cisplatin, PtCl2/NH3 12. A) 12.53 B) 5.68 C) 18.09 D) 11.35 E) 4.67 3)...
i need help with 2,4,5,8,9,10-12
6 pts Question 2 A student designs an experiment to test the hypothesis: "If a solution of sucrose in water has a higher concentration, it will attract more ants." The student makes sucrose solutions with concentrations of 1.00,5.00, 10.50, 20.00 and 25.00% sucrose by mass, then leaves the solutions outside. After some time has passed, the student counts the number of ants that are in each beaker. The independent variable for this experiment is the:...
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) One mole of any substance contains Avogadro's number of particles of that substance. What is the numerical value of Avogadro's number? A) 12.01 23 Avagrans t Male aton 6022 x1o atums B) 6.022 x 1023 C) 6.022 x 10-23 D) 1.661 x10-24 E) 1.00 x10-14 2) What is the mass of 4.00 moles of helium, the gas commonly used to fill...
answer all questions
ral Chemistry Concept 5 pts Question 1 Balance the chemical equation shown below, Indicate the stoichiometric coefficients for the reaction. Do not leave answer spaces blank if the coefficient is one (1). AIBrg(aq)+ HBr(aq)- Al(s)+ H2(g) The balanced equation will then be used in the following two questions. 5 pts Question 2 Using the balanced chemical equation from the previous question, how many moles of H2(g) will be formed from 6.24 moles of HBr. Your answer will...
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