Questions in Chemistry

Which lightens stains better vinegar or lemon juice science project

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What lightens stains better vinegar or lemon juice also what is the hypothesis for it

How many meters per second is the speed of light

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The speed of light is 1.86×10^5 miles per second.how many meters will light travel in 1.0 seconds

What is the molar mass of iron ii sulfate feso4

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What mass of FeSO4^2- x 6H20 (Molar Mass=260g/mol) is required to produce 500 mL of a .10M iron (II) sulfate solution. A.) 9g B.) 13g C.) 36g D.) 72g

Combustion of gasoline in a car engine exothermic or endothermic

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The burning of gasoline in an automobile engine is an example of a(n) _____. Select one: a. reversible reaction b. photosynthesis reaction c. endothermic reaction d. exothermic reaction

An acid that ionizes almost completely in solution is a

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Strong acids are those that ionizes almost completely in water. to be considered a strong acid, an acid must have an acid ionization constant ka > 55. the strong acid hcl …

Isotopes of the same element have the same mass number

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All isotopes of an element have the same number of neutrons. have the same number of protons. have the same atomic number. have the same mass number. have different chemical …

Which planet takes the longest time to orbit the sun

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Which planet will take the longest amount of time to orbit the sun? A. Jupiter B. Mars C. Mercury D. Uranus

How many sigma and pi bonds are in this molecule

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How many σ and π bonds are in this molecule? A chain of five carbon atoms. There is a double bond between the first and second carbon atoms and a …

The law of conservation of matter tells us that matter

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The law of conservation of mass tells us, in part, that matter is neither created nor destroyed. How can the law of conservation of mass for a chemical reaction be …

What determines the intensity of the color of a solution

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g What happens to the intensity of the solution's color as the concentration of the solute changes? The intensity of the color directly changes in response to the concentration. The …

Temperature as the average kinetic energy of a gas increases

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the average kinetic energy of the particles in a gas increases as the temperature of the gas increases. explain​

The molal freezing point depression constant for water is 1.86

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What is the freezing point of a 1.40 m aqueous solution of a nonvolatile un-ionized solute? (the freezing point depression constant for water is 1.86°c kg solvent/mol solute.)?

Which of the following is an electrolyte solution answers com

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Which of the following is an electrolyte?

What is the mass of 1 mole of fluorine gas

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Fluorine gas consists of diatomic molecules of fluorine (F2). How many molecules of fluorine are in one mole of fluorine?

One of the main disadvantages of being an endotherm is

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This rabbit lives where it gets very cold in the winter. It does this easily because it is an endotherm. Being an endotherm or warm-blooded has its advantages and disadvantages. …

How many miles per second is the speed of light

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The speed of light is 1.86×10^5 miles per second.how many meters will light travel in 1.0 seconds

Solve the following problems express your answers in scientific notation

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4. Express the answers to the following problems in scientific notation. Hint: Use the subtraction example to solve the addition problem. A. (1.8 X 1020) X (2.5 X 10^16) C. …

How does the muscular system interact with the digestive system

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How do the muscular system and digestive system relate to one another? Question 1 options: If your body needs more food, and you cannot eat. the muscular system helps the …

Arrange the following elements in order of decreasing atomic radius

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Arrange the following elements in order of decreasing atomic radius: Ba, Sn, S, Pb, and As. Rank elements from largest to smallest.

Of the following which atom has the smallest atomic radius

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Choose the atom that has the smallest atomic radius. Na Li K Rb

Most viewed questions in Chemistry


Rank the following compounds in order of the expected acidity

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Rank a series of molecules by expected solubility in water based on polarity and hydrogen bonding. Some slightly soluble compounds …

Cesium and chlorine express your answer as a chemical formula

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What is the chemical equation for cesium chloride and calcium sulfide

We are all connected in the great circle of life

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What does mufasa mean when he says we are all connected in a circle of life?


Which of the following is an example of a compound

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Which of the following is an example of a compounds? Select one: a.Cu b.CaCl2 c.Na d.Nd

Which planet takes the longest to orbit around the sun

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Which planet will take the longest amount of time to orbit the sun? A. Jupiter B. Mars C. Mercury D. …

What is a periodic table and how is it arranged

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How is the periodic table organized?


50 protons 46 electrons express your answer as an ion

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What is the symbol for an ion with 50 protons 48 electrons 68 neutrons?

How many groups families are represented on the periodic table

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A group or family represents the *blank* on the periodic table a.vertical column b.series c.block d.horizontal row

What is the mass in grams of 5.90 mol c8h18

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What’s is the mass in grams of 5.90 mol C8H18?


How many times bigger is the earth than the moon

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The sun is bigger than the Moon, but they appear to be the same size in the sky when you …

Calculate ph of buffer solution acetic acid and sodium acetate

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Calculate the ph of 0.375 l of a 0.18 m acetic acid-0.29 m sodium acetate buffer after the addition of …

Which of the following compounds is most soluble in water

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Which of the following compounds is the most soluble in water? A. CH3CH2CH2CH2CH2OH B. OHCH3CH2OCH2CH2CH3 C. OHCH2CH2CH2CH2CH2OH D.CH3CH2CH2CH2CH3


At room temperature biuret reagent should react with protein within

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What is indicated by Benedict's solution changing from blue to orange when heated? A.the presence of lipids or fats B.the …

What is the molar mass of copper ii sulfate cuso4

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An aqueous solution is 15.0% by mass of copper(II) sulfate pentahydrate, CuSO4∙5H2O.What is the molarity of CuSO4 in this solution …

An element's atomic number is equal to its number of

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The atomic number of an element is equal to the number of _____ contained in one atom of that element. …