Archeologists discover a gold crown in an ancient tomb. When they place the crown in a tub of water it displaces 941.2 mL of water. The density of gold is 19.3 g/mL. Gold is worth $57,056.24 per kg (or was on the day this question was written). Without taking into consideration any historical value for the crown, what is the crown worth?

Q: Consider a rectangular piece of printer paper that is 8.5’’ x 11’’ (’’ denotes inches). In order to…

A: Given, The dimensions of the paper are =8.5’’ x 11’’ (inches) The mass of a proton is = 1.67262 x…

Q: List the name and the atomic number of each element. (a) Mn(b) Ag(c) Au(d) Pb(e) S

A: In the periodic table, elements are arranged based on their similarities in properties. Each element…

Q: At death, a nobleman in ancient Egypt was mummified and his body contained 1.4 x 10-3 g of…

A:

Q: In the table below, there are descriptions of an experiment on samples of three different chemical…

A: Given that : We have to identify whether the elements are metal or non-metal form the given…

Q: Millikan determined the charge on the electron by studyingthe static charges on oil drops falling in…

A: (a)  significance of the fact that the droplets carried different charges  According to Millikan,…

Q: 106. Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm,…

A:

Q: Dr. Robert Pappas teaches that in essential oil chemistry, 99.9% of the time we are only concerned…

A: 1. Essential oils are complex mixture of plant compounds. 2. They are volatile 3. They are…

Q: The radioactive element carbon 14 has a 1/2 life of 5750 years a scientist determined that the bones…

A: According to the question, the radioactive element C has half life of 5750 years.  Lost percentage…

Q: summarize the properties of protons, neutrons, and electrons?

A: Concept introduction: Atom mainly consist the electrons, protons and neutrons. Protons and neutrons…

Q: Specify the number of protons and electrons in each of the following ions. A) Se^2−, needed for…

A: To specify the number of protons and electrons we will use the following concept . Since we know…

Q: The subatomic particle known as the proton has a mass of 1.67x10-24 g and a diameter of 1.00x10-13…

A: Density is given by the expression: Density=MassVolume

Q: Consider a rectangular piece of printer paper that is 8.5’’ x 11’’ (’’ denotes inches). In order to…

A: Given, Dimension of paper  = 8.5’’ x 11’’ Mass number of hydrogen atom = 1

Q: Archeologists discover a gold crown in an ancient tomb. When they place the crown in a tub of water…

A: In the question , Following datas given - (1) Volume of gold crown, displaced by it on placing it in…

Q: For each of the following elements, write its chemical symbol, locate it in the periodic table, and…

A: (a) Silver  Symbol = Ag Position = 5th period, 11th group It is a metal (b) Helium Symbol = He…

Q: List the Elements required by Living Organisms?

A: To find: The elements required by Living organisms

Q: I would like help with this question please. Thank you in advance!

A:

Q: Convert each given mass to number of representative particles. Identify thetype of representative…

A: a) 4.56×103 g Si Number of particles means number of molecules. Since, Number of particles in…

Q: Compare the amount of copper predicted in part A with the amount measured in part B. What percentage…

A: Predicted copper amount=0.9918 Actual amount of copper produced= 0.72

Q: An example of an element is chicken noodle soup powerade air inside a balloon lead pipe baking soda…

A: An element is a pure form of substance in which all atoms have same number of proton so here we see…

Q: 5. Subatomic Particles. Give the number of protons, neutrons, and electrons in each of the following…

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

Q: The mass of a proton is 1.673 x 10-27 kg and the diameter of the nucleus of the H atom is 1.0 x 10°…

A: Given in the question, Mass of proton = 1.673 ×10-27kgDiameter of nucleus = 1.0 ×10-3 pm Radius of…

Q: How many protons are contained in a circular puddle of liquid mercury that is 6.25 inches wide and…

A: In the given question we have to calculate the number of proton contained in a circular puddle of…

Q: By one estimate, an electron travels around the nucleus of an atom at a speed of 1.50 x 10^6 m/s.…

A: A) To change m/sec into km/Hr we multipy 18/5 1.5×106×18/5= 5.4×106km/hr

Q: If the radius of a neutron is 1.0 x 10-13 cm, calculate the density of a neutron in g/cm3 . (volume…

A: Given, radius(r) = 1.0 × 10-13 cm we know that the neutron is spherical in shape so the volume of…

Q: Marie Curie is famous for her study of:  a. hydrogen b. electricity c. radiation d. magnetism

A: Marie Curie was a Chemist and Physicist. She won nobel prize for the discovery of Polonium and…

Q: . An iron supplement is used to treat anaemia and 50 mg of Fe2+ is required per tablet. If the iron…

A: The question is based on quantitative estimation. we have to calculate how much compound is required…

Q: 7. How many Centimeters are in 133 meters Kilobytes are in 6.02 gigabytes Micrometers are in 5144…

A:

Q: calculate the percent error

A: 1. Actual density = 1.15 g/mL Theoretical density = 1.0 g/mL % error = (Actual - Theoretical) /…

Q: An atom is 1.3x10-10 m in diameter. If an atom was 1cm in diameter, how tall would you be (1.78m).

A: The height of a person is 1.78 m when the diameter of an atom is 1.3x10-10 m or 1.3x10-8 cm. Now…

Q: Earth’s surface area is 5.1 x 108 km2, its crust has an average thickness of 35 km and an average…

A: Since the volume of earth will be = surface are of earth X thickness of earth = 5.1 X 108 X 35 =…

Q: 11. At death, a nobleman in ancient Egypt was mummified and his body contained 1.4 x 10 3 g of…

A:

Q: Devise a system of chemical symbols that is easy to use by answering the questions below. Look up…

A: For writing chemical symbols one or two letters are used and first one is written in capital letter…

Q: A student is asked to identify an element that is highly reactive, solid, and conducts electricity…

A: Highly reactive , solid and conductor of electricity , element present at location 1.  It is…

Q: The mass of an unidentified rock is 15.5 grams. Students determine the volume of the rock by placing…

A: Tables -   Rock                 Density Range (g/cm3)  Coal.                    1.1 - 1.4…

Q: Complete the following shorthand notations: ? (р, а) $Li 31p (a, ?) 1čS 242Cm (a, n) ? Mg (? ,p) iNa…

A: To find: The complete shorthand notation for the given compounds

Q: Identify each of the following elements as a metal, a nonmetal, or a metalloid. Drag the appropriate…

A: the given element is classified into the following categories:

Q: While looking at bromine (Br) on the periodic table, a student needs to find another element with…

A: The

Q: V sphere %3D 3 Osmium (Os) is a transition metal which has a density of 2.257 x 104 kg/m at 20°C. A…

A:

Q: Currently, the atomic mass unit (amu) is based on being exactly one-twelfth the mass of a carbon-12…

A: The mass of an atom is not only due to the sum of the masses of the neutrons, protons and electrons…

Q: Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm…

A:

Q: An atom of rhodium (RhRh) has a diameter of about  2.7×10−8cm2.7×10−8cm.

A: Answer: Diameter of Rhodium atom  d=2.7×10-8cmd=2.7×10-10m Since, radius is half of the diameter,…

Q: What is the mass of 1.6 x 1021 neon atoms?

A:

Q: 1. A typical multivitamin tablet can contain 2.00 mg of vitamin B2 (riboflavin), and the RDA is…

A: The solution is given below -

Q: 1. An archeology student found a coin at a dig. She determined that the mass of the coin is 4.51 g…

A: Given: Mass of the coin = 4.51 g The volume of the coin = 0.49 cm3

Q: A neutron star has a density of 5.0 x 1017 kg/m3. How many ?μL of space would 5.0x106 metric tons…

A:

Q: Below is a list of properties of elements. Classify them as a property of metals, nonmetals, or…

A: Given properties:

Q: 19. The graph above shows elements present in the greatest amounts in the human body. Use…

A:

Q: Identify each of the following elements as a metal, nonmetal,or metalloid: (a) phosphorus, (b)…

A: Metals and Nonmetals are different types of materials present around us. Metals (like copper and…

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.