Calculate the mass, in grams, of each of the following. 2.0x10^23 lead atoms Express your answer using two significant figures. 7.8x10^21 uranium atoms Express your answer using two significant figures. 1.3x10^23 gold atoms Express your answer using two significant figures. 2.74x10^22 helium atoms Express your answer using three significant figures.

Q: What amount of SiO₂ is produced from the reaction of 5.0 mol Si₂H3 with 10.0 mol of O₂ ? 4 Si₂H3 +11…

A: Given stoichiometric problem is                                       4 Si2H3     +    11 O2…

Q: Where lines cross in a Fischer Projection, what exists? a H atom an O atom a Catom no atoms

A: In this question, we will see which atom present in the line cross in a fischer projection.  You can…

Q: 3. List the types of intermolecular forces that exist between the following molecules: H Н Н Н Н Н )…

A: Intermolecular acting force depends upon the type of atoms present in structure of molecule.

Q: After the benzoate ion is separated from methyl benzoate because of their differences in solubility,…

A: Benzoate ion is soluble in water because it is an ionic compound. Benzoate ion is a conjugate base,…

Q: Determine the number of protons and neutrons in each of the following isotopes. 223 Rn 86 Express…

A: We can obtain the number of neutron upon subtracting mass number with number of protons.

Q: 73.33.5ml of 0.9998N NaOH was used in the titration of 50m! HCI solution. Calculate the normality. 3

A: In this question, we will determine the normality of HCl.  You can see the details calculation…

Q: Calculate the Celsius temperature at which 0.0100 grams of CH4(g) occupies a volume of 246.3 cm3…

A:

Q: Why does the zwitterion form of an amino acid exist? The acid part of the amino acid donates a…

A: We have to predict the correct statement for zwitterion.

Q: Propane and chlorine react in the presence of UV light to give 2-chloropropane other things:…

A:

Q: 76. What weight of 98.5% KHP (204g/mol) is equivalent to 40mL of 0.1 NaOH?

A: Volume of NaOH solution = 40 mL = 0.040 L  ( given )  Normality of NaOH Solution = 0.1 N.    ( given…

Q: 4. A liter of gas at a temperature of 25°C and a pressure of 730 mm weighs 1.6 grams. a. What volume…

A:

Q: 6) What is the major product of the following reaction CH3 | СН3-С -C- CE311 HO а CH3 СН3 ОН CH3…

A:

Q: Design a buffer that has a pH of 7.34 using one of the weak base/conjugate acid systems shown below.…

A: Given pH of buffer = 7.34select a weak base out of three choicess whose pKb is close to required…

Q: Draw the products that result from the following mechanism, and identify the elementary step.…

A:

Q: Which sample has the smallest mass? The density of aluminum is 2.7 g-cm-3, and the density of copper…

A: Given,  The density of aluminum = 2.7 g. cm-3  The density of copper = 9.0 g. cm-3  The sample which…

Q: Please draw structures for compounds named below. A) 1-chloro-3-ethylhexane B)…

A: The structures can be drawn as:

Q: The secondary structure of a protein is influenced by both hydrogen bonding and London dispersion…

A: In the given question , two kinds of interactions are discussed and asked. First one is hydrogen…

Q: 62. Sodium bicarbonate (84g/mol) tablet was dissoved in 200mL of water and consumed 38.2mL of…

A: To calculate : percentage claim Molar mass of NaHCO3 = 84g/mol  Normality of HCl = 0.1009N Volume of…

Q: 19. Calculate the oxidation state of the underlined element: BaSO4

A:

Q: What devices will you use to measure the mass and the volume of water?

A: Given is an extract of the procedure of doing an experiment . We are asked to answer the instruments…

Q: The 02- ion has how many protons and electrons?

A: Ans: 8 protons and 10 electrons.

Q: Which of the following molecules is consistent with the given IR spectrum? 100 TRANSMITTANCE D O O O…

A: IR spectroscopy is used to determine functional group.

Q: drogen per Sample

A: Given equation shown as,

Q: name the following ether using (Non-IUPAC) CH3CH2CH(CH3)OCH2CH2CH3

A: Ether group ( R - O - R' ) In the Ether group , the Oxygen atom is bonded by the two sides by the…

Q: For ach of the following representations (from OpenStax Biology), indicate whether it is describing…

A: We have to tell the given representation describes whether the primary, secondary or tertiary…

Q: Electrochemical cell potentials can be used to determine equilibrium constants. What would be the…

A:

Q: How many distant nucleus pairs are in NH, molecule? a. 16 b. 1 C. 8 d. 6 c. 4 f. 2 9. 12 h. 3

A: Distant nucleus pairs can be calculated by considering number of nucleus.

Q: Question 5 of 5 HNO3 O Acid O Molecular

A: Here, we have to find whether HNO3 is acid or not.

Q: PROBLEM 02 Find m, n, k and write the final rate law Reactant A (M) 1.2 1.2 3.6 Reactant B (M) 2.4…

A: The following problem can be solved using initial rate law method as:

Q: Show the curved arrows between propan-2-ide and water.

A: In the given question it is asked to show the reaction mechanism of the reaction that will take…

Q: . Titration of Ca²+ and Mg²+ in a 50.00-mL hard water sample required 23.65 mL of 0.01205 M EDTA. A…

A: A question based on environmental pollution that is to be accomplished.

Q: Which of the following statement is true. b. C. Operators containing different independent variables…

A: In the given question three statements are given and it is asked that which one of them is true.…

Q: Sodium bicarbonate (84g/mol) tablet was dissoved in 200mL of water and consumed 38.2mL of 0.1009N…

A: Given, Sodium bicarbonate was dissolved in 200 mL water 38.2 mL of 0.1009N HCl was consumed.…

Q: Answer the question below the reaction. OH + Excess NH4Cl H₂SO4 The reaction above proceeds through…

A:

Q: Using a sheet of paper, draw the products obtained in each of the following reactions. When…

A: Given

Q: 100mL 1M H2SO4 : How much amount do you need (in mL) - Here you use 95% weight percent of sulfuric…

A: According to the question, two solutions are to be prepared: 1) 100mL 1M H2SO4 from 95% H2SO4 2)…

Q: D- If both statements are FALSE An increase in pressure favors a shift in the direction that will…

A: 1) According to the ideal gas equation :-  P V = n R T  Pressure is inversely propotional to the…

Q: Determine whether each reactant gains or loses electrons to form an ionic compound. 2 K(s) + S(s) ->…

A:

Q: Circle the correct responses in the following statement: Density is a physical / chemical property…

A: Physical and chemical properties are of the matter.

Q: (i) What do you understand by the dual nature of light? Explain clearly in few sentences. (ii)What…

A:

Q: 2. Draw the Lewis structure of the dipeptide that results when histidine reacts with valine.

A: According to the company guidelines, we have to answer only the first question. So, please kindly…

Q: 3. The molecular mass of propane is 44 g/mol. What is the mass of one liter of propane at STP?

A: According to the company guidelines, we have to answer only the first question. So, please kindly…

Q: point. Wh 4+5H₂O

A: Given equation shown as,

Q: What is the approximate numerical value of the O-Xe-O bond angle? 90° 109⁰ 120° 180° What is the…

A: Let's discuss the shape and bond angle of the given compound in the question.

Q: When ammonium nitrate is dissolved in water, what species are present in aqueous solution? (choose…

A:

Q: Cobalt (Co) has an HCP crystal structure, an atomic radius of 0.1253 nm, and a c/a ratio of 1.623.…

A: As cobalt(Co) has an HCP( Hexagonal Closed Packed ) structure so to evaluate  the volume of the unit…

Q: Oxalic acid, H₂C concentrations o A 0.198 M solut

A:

Q: НО.

A:

Q: What is the condensed structural formula for the following molecule? O HOH О H2O COC О C20 CHOCH…

A: Condensed Structural Formula It is one of the form to represent the molecule in organic Chemistry .…

Q: Draw the Lewis structure of the unknown acid in which the HH atom(s) are bonded to OO atom(s)

A:

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.