Questions in Chemistry

How does the viscosity of magma change as magma cools

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How does the viscosity of magma change as magma cools?

Label each substance as either an element or a compound

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Help!! 29 pointss label these as either element compound mixture of elements mixture of compounds mixture of elements and compounds

The formula weight of aluminum sulfate al2 so4 3 is

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What is the molar mass of Al2(SO4)3?150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol

What is the mass number of an element equal to

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The mass number of an element is equal to ____. a. the total number of electrons in the nucleus b. the total number of protons and neutrons in the nucleus …

How many protons and electrons are in a calcium ion

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A calcium ion has a charge of +2. How many protons and electrons does it have? An atom has 6 protons, 7 neutrons, and 6 electrons. Fill in the blanks …

Draw structures for the organic products of the reaction below

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Toluene, C6H5CH3, is given below. Draw the major organic product for each reaction. Assume 1:1 reaction stoichiometry. If more than one product is possible, only one structure needs to be …

What is an example of a physical model in science

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Give an example of a physical model, and explain one limitation of the model. Then give an example of a mathematical model, and explain one limitation.

What is the original source of energy in an ecosystem

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What is the original source of the energy that flows through most ecosystems? What would happen without this source?

How does the rate of formation of o2 compared with

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Given the following balanced equation, determine the rate of reaction with respect to [O2]. If the rate of formation of O2 is 7.78 x 10-1 M/s, what is the rate …

What is the role of cytoplasm in a living cell

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What is the role of cytoplasm in a living cell? A fight infections B. digest proteins C. surround organelles D. pass on genetic information

In the periodic table the elements are arranged in ________

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In the modern periodic table, elements are arranged in order based on the number of in the nuclei of their atoms.

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 at 20°C?The density of this solution at 20°C is1.167g/mL(molecular weight …

How does an instant cold pack get cold so quickly

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Please help urgent !!! How does an instant cold pack get cold so quickly?

Identify the influence of mass and distance on gravitational forces

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What 2 factors determine gravitational force? Total Mass Weight Gravity Distance

What are common signs that a chemical reaction has occurred

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Identify common signs that a chemical reaction has occurred

Chemical reactions occur when atoms are separated joined or rearranged

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According to Dalton's atomic theory, elements are composed of tiny particles called ___ .Atoms of each element are ___ from the Atoms of all other elements. Atoms of different elements …

What are the steps of the nitrogen cycle in order

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Put the steps of the nitrogen cycle in order

What are the charges of each of the subatomic particles

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Describe the charges of the subatomic particles by choosing the answer from the drop-down menu. Proton have a charge. Have a 0 charge. Electrons have a charge.

Why must the stopper be removed from the separatory funnel

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Select the statement that is NOT true about venting during an extraction. A.The separatory funnel stem should not be pointed towards any person while venting. B. The stopper must be …

What is the volume of water in a graduated cylinder

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Fill the 25-ml graduated cylinder with 11.5 mL of water, what’s the volume?

Most viewed questions in Chemistry


Convert 8.00 x 10 20 molecules of h2 to moles

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How many carbon atoms are in 2.12 mol of propane

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Which of the following is true about subatomic particles

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An oxidation reduction reaction that is also a synthesis reaction

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What is the difference between a white and red reaction

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Determine the minimum mass of hydrogen gas required to produce

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A solution that contains 70g of nano3 at 30 c

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What is the uncertainty of a 50 ml graduated cylinder

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What is the electron pair geometry for c in cs2

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Calculate the molality of a 20 by mass ammonium sulfate

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Which of the following statements regarding electrical safety is correct

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Write the mechanism for the reaction of cyclohexane with bromine

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Arrange the following elements in order of decreasing ionization energy

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Which factor causes a decrease in the rate of dissolution

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Calculate the mass of 3.05 buckets of golf balls answer

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