Liquid A has 10 grams of element X per liter. Liquid B has 15 milligrams of element Y per cm3 (there are 1000 milligrams in a gram and 1000 cm3 in a liter). It is desired to make 150 grams of molecule Z. To make 18 grams of Z requires 2 grams of X and 16 grams of Y. How many liters of each liquid should be used?

Q: Assuming that the shape of atoms is spherical, what is the diameter (in angstroms) of an atom that…

A: A multiple choice question based on atomic structure, which is to be accomplished.

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: Elemental symbol for lead is Pb and it should be Pb .

Q: A sample of chloroform is found to contain 12.0 g of carbon, 106.4 g of chlorine, and 1.01 g of…

A: Given : Mass of carbon in sample 1 = 12.0 g Mass of chlorine in sample 1 = 106.4 g Mass of hydrogen…

Q: When 6.00 g of sulfur are combined with 6.00 g of oxygen, 12.00 g of sulfur dioxide (SO2) are…

A: Molecular mass of sulfur = 32 g /mol, means 32 g in 1 mol.Molecular mass of O2 = 32 g / mol, means…

Q: What is the value of Avogadro's number?

A: Answers are given below.

Q: The metal magnesium consists of 3 isotopes with the following atomic masses and abundances: 24Mg -…

A: Given,  24Mg - 23.99 amu (78.70%) 25Mg - 24.99 amu (10.13%) 26Mg - 25.98 amu (11.17%).

Q: Identify the three elements indicated on the periodic table, and give the group that they are in.…

A: The marked group along with their elements has to be identified. They have to classified as metals,…

Q: K: Mn: Ge: Kr:

A:

Q: What is the atomic weight for the element that is in group IIA(2) and period 2? (Enter your answer…

A:

Q: 3. Boron (B; Z=5) has two naturally occurring isotopes. Find the percent abundances of ¹0B and ¹1B…

A:

Q: Sulfur forms several compounds with fluorine. Upon decomposition, sample one produces 4.45 g of…

A: Given information is:                   Sample 1 →Decomposition F(4.45grams) + S (1.25grams)…

Q: An element has two isotopes. One isotope has a mass of 63.22 g. The other has a mass of 67.88 g. If…

A: An isotope of an element contains different number of neutrons in their nucleus. That is, isotopes…

Q: Density of the hydrogen atom Use the information below to calculate the density of the hydrogen-1…

A: Given : Radius of hydrogen atom = 53 pm Since 1 pm = 10-10 cm Hence radius of hydrogen atom in cm =…

Q: A silver wire has a diameter of 0.500cm what length of the wire contains exactly 1.0×10²³ atoms of…

A: Given: Diameter of the wire = 0.500 cm  And the number of atoms of Ag wire = 1.0 X 1023 atoms.

Q: Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance =…

A: Given data contains, Isotopic mass of 24Mg is 23.9850 amu. Abundance is 78.99%. Isotopic mass of…

Q: Predict the organic compound based on their results with different reagent tests. Provide correct…

A: Nitrous acid test is generally used for the distinguishing the primary, secondary and tertiary…

Q: Q4) consider the element Xy that has an atomic number of 56. If this element has the following data…

A: We are given percentage of natural abundance and mass of its isotopes and we have to calculate it's…

Q: In an experiment it was found that the total charge on an oil drop was 5.93 3 10218 C. How many…

A: Millikan estimated an electron's charge. All of the drops had charges that were multiples of 1.6 x…

Q: A sample of Cl 2O was composed of 5.921 g of chlorine and 5.342 g of oxygen. How many grams of…

A: Given: In sample 1, Mass of Cl in Cl2O = 5.921 g. And Mass of O in sample 1 Cl2O = 5.342 g. And in…

Q: A compound containing only carbon and hydrogen has a carbon-to-hydrogen mass ratio of 11.89. Which…

A: The solution of this question is given below-

Q: Draw the graph for the isotopes of monatomic chlorine, "Cl and ³»CI. You don't need to include *CI…

A: The percentage abundance of Cl is as follows: 35Cl=75 % 37Cl=25 % The graph is as follows:

Q: Identify these elements based on their locations in the periodic table. Give the symbol, not the…

A: period 3, group 13 (3A) ➝ Al (p-block element)

Q: Magnesium, Mg Strontium, Sr Barium, Ba E Radium, Ra :::: :::

A: We know that on going left to right atomic radii decrease and on going from top to bottom atomic…

Q: A cube of solid aluminum has a volume of 8.87×103 cm3 and a density of 2.6989g/cm3. However, the…

A: Initial volume V1 = 8.87 x 103 cm3.Density, d = 2.6989 g/cm3.Initial mass, m1 = V1 x d = (8.87 x 103…

Q: Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance =…

A: Given data contains, Isotopic mass of 24Mg is 23.9850 amu. Abundance of 24Mg is 78.99%. Isotopic…

Q: Suppose there are two known compounds containing the generic elements X and Y. You have a 1.00 g…

A: Given, one sample contains 0.28 grams of X and other sample contains 0.37 grams of X.  The…

Q: What is the edge length (in cm) of a titanium cube that con- tains 2.55 x 1024 titanium atoms? The…

A: Calculate the number of moles as follows, Number of moles =2.41×10246.022×1023=0.4×10=4 moles Now,…

Q: Differentiate between an atom, an element, and a molecule.

A: Element - are naturally occurring species  Atom-building block of molecule  Molecule - made up of…

Q: In a reaction, 34.0g of chromium(III) oxide reacts with 12.1g of aluminum to produce chromium and…

A: 34.0g of chromium(III) oxide 12.1g of aluminum Both of these react to produce 23.3g of chromium and…

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: Atom is made up of nucleus (proton and neutrons) and electrons are revolving around it.

Q: A sample of 5.000 g of nitrogen can be combined with 5.714 g of oxygen to form nitric oxide gas…

A: The amount of products formed for the given quantity of reactants is determined using stoichiometry.…

Q: Classify each element as a metal, a semimetal, or a nonmetal. Metal Semimetal (metalloid) Nonmetal

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Imagine an alternate reality. The Thomson cathode ray experiments arrived at a charge to mass ratio,…

A: Here, we have to determine mass of electron.

Q: There are 2 isotopes of copper that occur naturally; 63Cu and 65Cu. The 63Cu atoms have a mass of…

A: PERCENT abundance for 63Cu is 69.717% PERCENT abundance for 65Cu is 30.283 %

Q: Nitrogen has two isotopes, N-14 and N-15. The isotopic masses of these isotopes are 14.0031 amu and…

A: Let consider x and y be the abundance of N-14 and N-15 isotopes of nitrogen respectively. Then we…

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: We know that, Lead is an element with the  atomic number 82 and its symbol is Pb . It is a metal and…

Q: Boron (B; Z=5) has two naturally occurring isotopes. Find the percent abundances of 10B and ¹¹B…

A: Answer: This question is based on percentage calculation of isotopes of Boron when average atomic…

Q: Antimony has two naturally occurring isotopes: Sb−121 with a mass of 120.904 amu and a natural…

A:

Q: In a reaction, 34.0 g of chromium(III) oxide reacts with 12.1 g of aluminum to producechromium and…

A: Given data, The balanced chemical equation is given below, The mass of chromium(III) oxide = 34.0 g…

Q: The radius (r) of a silver atom is 160 picometers (1 pm = 1 × 10–12 m). Estimate the thickness of…

A: First convert the unit of radius from picometers to centimeters; 1 pm=10-10cm160 pm=160×10-10cm

Q: the history of the discovery of hydrogen and what properties they observed to identify it

A: Position of hydrogen in periodic table:   Hydrogen is regarded as rogue / disputable element because…

Q: Antinomy, Sb, has 2 isotopes and an atomic weight of 121.75 amu. The isotope anitimony-121 has a…

A:

Q: A sample of 7.000 g of nitrogen can be combined with 8.000 g of oxygen to form nitric oxide gas…

A: In NO, the ratio of moles of N and O is = N : O = 1 : 1. Hence 1 mole of NO contains 1 atom of N and…

Q: Rank the masses of the elements from lightest to heaviest. To rank items as equivalent, overlap…

A: Atomic masses of the elements: B : 11 u Cr: 52 u Li: 7 u

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.