Question 15 The average distance between the earth and the moon is 384,403 km. How many dollar bills are needed to make a stack that spans this distance? Thickness of a dollar bill is 0.0043 inches. 3.52

Q: In 1993 the Minnesota Department of Health set a health risk limit for beryllium in groundwater of…

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Q: A scientist removed a sample of 37.8 grams of a chemical from a container. The sample was 4 1/4 less…

A: Given the mass of the sample removed out of the total mass = 37.8 g  Suppose the total mass of the…

Q: Calculate the number of oxygen atoms in a 130.0 g sample of iron(III) oxide (Fe₂O3). Be sure your…

A:

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A: Logarithm and  antilogarithms are used for the chemistry problem because it reduces an extremely…

Q: 7) How many kilograms is a 27 oz. bag of M&M's? 8) How many kilometers can a car travel on 19…

A: Since you have posted multiple questions, we are entitled to answer the first 3 only.

Q: QUESTION 5 Methanol (CH3OH) is a liquid at room temperature with a density of 7.91 ×10² kg/m2. In a…

A: The answers are discussed step by step below:

Q: STARTING AMOUNT x The US National Institute of Standards and Technology (NIST) used a mercury gauge…

A: The mass of a substance divided by its density gives the volume of the substance.

Q: You add 297 grams of NaCl to a container and then you add 898 grams of water to that same container.…

A:

Q: How did you end up getting 6.023 x 1023? Why can't we divide 8.50 x 1015 by 32.06 (grams of S)?

A: There are different formulas to calculate the number of moles of the substance based on the given…

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A: Complete the table,NlnNlogN6.194.016-0.455

Q: If a rectangular piece of cement is 2.00 cm x 2.00 cm x 9.00 cm and has a mass of 108 what is its…

A: Given: dimensions: 2.00 cm×2.00 cm×2.00 cm mass = 108 g

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A: (a) N = 22.4 ln N :- ln 22.4 = 3.11   log N :- log 22.4 = 1.35   (b) ln N = -0.856 N = e-0.856N =…

Q: y varies directly as x. When x = 6, y = 12. What is the equation that relates the quantities?…

A: The problem states that 'y varies directly as x'. This means that y is directly proportional to x.…

Q: What is the mass in grams of 4.57 × 10²⁵ molecules of Cl₂? I get the write and but the wrong number…

A: Mole concept: The number of molecules in one mole of chlorine is equal to the Avogadro number. The…

Q: y varies directly as the square root of x. When x = 16, y = 12 What is the equation that relates the…

A: The problem states that 'y' varies directly as the square root of 'x'. This means that 'y' is…

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A:

Q: 9) A cube containing two sodium atoms has a mass of 7.64 x 1023 g and a density of 0.963g/cm³.…

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Q: 7. The speed limit on a road in Mexico is 90 km/hr. What is this speed equivalent to in miles per…

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Q: In an experiment, calcium carbonate reacted with different volumes of hydrochloric acid in water.…

A: Calcium carbonate reacts with hydrochloric acid to form the carbon dioxide gas.

Q: If you have 52% silicon dioxide in a 12.09 g sample, what mass of silicon dioxide do you have?   Am…

A: Given, Mass % = 52%  Mass of sample = 12.09 g  Mass of SiO2 = ?

Q: Part A Measure and record the masses of all the metal strips you set out in front of the test tubes.

A: 1. molar mass of Magnesium is24.305 g/mol. 2. Zinc mass number of 65.39 g/mol. 3. Copper atomic mass…

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A: The question is based on experimental chemistry.We need  to solve for the given operations.

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

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Q: N 6.02 In N 3.109 log N -0.094

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Q: A chemist has a 19.50g sample of drinking alcohol (ethyl alcohol). what is the volume ogf the…

A: The relationship between mass and volume is given below.

Q: Question 11: You are a gemstone expert studying samples of various materials. Gemstone Hambergite…

A: From the given gemstones, the most massive gemstone is = Smoky Quartz (density = 2.65 g/mL) The…

Q: Question 5

A: Given, Volume of CCl4 = 2.00L Density = 1.60g/mL

Q: Question attached

A: Given  initial mass = 2.752 g final mass = 1.941 g  a) To calculate the percent of water in the…

Q: If the mass sample of water was 5.39g and the molar mass of water is 18.02 g/mol, what is the amount…

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Q: SECTION 2: Thinking 3. How many grams of air are required for an automobile to travel from Thunder…

A: A question based on mole concept. A set data for combustion of Octane is given using that the mass…

Q: You will need to take logs and antilogs to solve many chemistry problems. For practice, complete the…

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Q: What is the amount of Ne in moles in a 355 gram sample of Ne? (Molar mass of neon = 20.18 g/mol)…

A: Given   mass of Ne            = 355 gram  Molar mass of Ne  = 20.18 gram/mole  Number of mole of Ne…

Q: Brass is an alloy of copper (8.92 g cm–3) and zinc (7.14 g cm–3). A 208.3 g piece of brass has a…

A: First, we need to calculate the density of the brass. Density is defined as mass divided by volume.…

Q: a chemist has 19.50g alcohol. what is the volume of the sample, what additional information is…

A: The volume of a given liquid is defined as the amount of the space occupied by the liquid that fully…

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A: We know that, Lowest significant digit present in the given questions is also a part of answer means…

Q: Example: In a lab, students were given the following materials and asked to find the volume of the…

A: Archimedes' principle: If a body is completely submerged in a beaker of water, the volume of…

Q: I Review I Constants I Periodic Table A hybrid electric vehicle has an EPA gas mileage rating of 49…

A: EPA mileage of the car is 49mi/gal 1mile=1.60934km 1gal=3785.411ml

Q: Calculate the number of oxygen atoms in a 150.0 g sample of scheelite (CaWO4). Be sure your answer…

A: Number of Oxygen atom in 150g CaWO4 can be calculated as follows

Q: Question 17 Chemical waste is often shipped in 55-gallon drums. What is the weight in pounds of a…

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Q: 17

A: Given: 29 chunks of iron, 15 chunks of silver, 17 chunks of platinum

Q: Use the algebraic equation to determine the mass if the volume was 622 mL.  mass (g) = (3.60…

A: Given, mass (g) = (3.60 g/mL)(volume (mL)) + 11.4 g y= mass (g) m = 3.60 g/mL x= 622 mL b = 11.4 g

Q: What is the mass in grams of KBr in 0.400 L of a 0.350 M solution?

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Q: Please answer question number 2  correctly with the correct answer. there is a picture of an example…

A: 32.0 g/mol approx. is the molar mass of dioxygen (O2) gas and there are 6.022x1023 of molecules of…

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.