The U.S. Government has about 1.23 * 107 pounds of gold in Fort Knox. How much is it worth at today's value of $1,576.30 per Troy ounce?

Q: Most chemistry laboratories have balances that can weigh to the nearest milligram. Would it be…

A: Given,  Molecules of C18 H38 = 5.88E+18 molecules The mass of C18 H38 is:

Q: An aluminum atom has a mass of 4.48×10^-23 g and a small airplane has a mass of 5000. kg. Use this…

A: The objective of the question is to find out the mass of 1 mole of aluminum atoms and the number of…

Q: You have a sample of neon (Xe) that contains 1 mole of atoms. If the diameter of a xenon atom is 216…

A: We have given 1 mole of xenon(Xe) gas having each atom a diameter of 216 pm. And we have asked to…

Q: Take the mass measurement with nitrogen (28 dalton or atomic mass units per molecule) and the mass…

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Q: A copper atom has a mass of  ×1.0610−22g  and a penny has a mass of  2.5g . Use this information…

A: Given data :· Mass of copper atom = 1.06×10-22 g· Mass of Penny = 2.5 gWe need to calculate :· The…

Q: The density of gold metal is 19.3 g/cm3, while that for silver is 10.5 g/cm3. Suppose you had the…

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Q: On the fictional planet of Nofactori, two commonly used mass units are related to one another by the…

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Q: If I start with 17.88 moles of oxygen, how many grams of CO2 can be made? 2 C3H18 + 25 O2 16 CO2 +…

A: Here we have to apply basic maths and from that we can obtain the answer Mass of 16 moles of CO2 is…

Q: Add mathematical symbols (+, -, *, /, v, !, etc.) to make the following expressions true. For…

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Q: The element boron has two stable isotopes: boron-10 (10.0129 u) and boron-11 (11.0093 u). The…

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Q: Calculate the number of oxygen atoms in a 150.0 g sample of dinitrogen tetroxide (N₂O4). Be sure…

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Also, Number of atoms…

Q: In heavy water, each of the hydrogen atoms is replaced by a deuterium atom. If the density of…

A: Heavy water is the deuterium oxide, which is another form of water containing heavier isotope of…

Q: mass o

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Q: Classify the substance shown in the sketch below. You can click the other tabs in the sketch to get…

A: In chemistry, compounds are classified as solid, liquid, or gas based on their physical and chemical…

Q: Suppose you need 7.0 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to…

A: Given data :- Length of required tow chain = 7.0 mGrade of tow chain = 70 Diameter of tow chain =…

Q: Ca(s) + O2(g) + S(s) → CaSO4(s) [?]g 6.400 g 3.206 g 13.614 g According to the law of conservation…

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Q: how many sodium atoms would fit along a straight line exactly one (1) inch long

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Q: What is the mass, in kilograms, of 7.76 x 10-4 molecules of carbon tetrachloride? Round your answer…

A: The given data contains, number of molecules of carbon tetrachloride = 7.76×1024

Q: How many grams of potassium are in 4.25 kg of apples if an apple contains 159 mg potassium and there…

A: The given problem can be dealt with dimensional analysis concept. We can calculate the grams of…

Q: An atom of rhodium (RhRh) has a diameter of about  2.7×10−8cm2.7×10−8cm.   Part A: What is the…

A: "Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Atoms are the smallest spherical particles that make up any matter. If 6.0x10^23 atoms of aluminum…

A: Avogadro’s number is used to determine the number of atoms present in 1 mol of an element.…

Q: 9.43×1019 CH4CH4 molecules Express your answer using three significant figures.   Calculate the mass…

A: We know, 1mole consists of 6.022x1023 quantity. Molar mass of CH4=16.04g/mol We will convert number…

Q: The volume of a single barium atom is 4.29 x 10 μL cm³. What is the volume of a barium atom in…

A: We know that the relationship between cubic centimeter (cm3) and microliter(µL) is :1 cm3 = 1000 µL

Q: The volume of a single tungsten atom is 1.07 x 10-23 cm³. What is the volume of a tungsten atom in…

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Q: Mercury is commonly supplied in flasks containing 34.5 kg (about 76 lb) of the element, which has a…

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Q: Chemical Formulas as Formulas: Converting between Grams of a Compound and Gram of a Constituent…

A: First convert given mass in kg  into grams .

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: What is the mass, in g, of 2.67 × 10 nickel (Ni) atoms? Enter your answer in scientific notation. 12…

A: The given data contains, Atoms of nickel = 2.67×1012 Molar mass of Nickel = 58.69 g/mol.

Q: The radius of cesium atom, Cs, 1s 265 pm, and its mass is 2.21 x 10 22 g. What is the density of the…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: The reaction between copper and sulfur is represented by the chemical equation shown below. What is…

A: Mole=Mass/molar mass  Then mole-mole relationship We will get the answer

Q: A student plots the graph of absorbance vs. concentration for their sample. They end up with a line…

A: Question is based on the concept of absorbance and concentration. we have been given the line with…

Q: You are given a cube of pure adamantium. You measure the sides of the cube to find the volume and…

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Q: A chemist measures the amount of iodine solid produced during an experiment. He finds that 3.02 g of…

A: Please find your solution below : Mole is a unit used to measure amount of a substance. The number…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.