09/22/19

Consider the reaction when aqueous solutions of chromium(II) sulfate and calcium nitrate are combined. The net ionic equation for this reaction is:
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09/22/19

Consider the reaction when aqueous solutions of potassium sulfide and iron(II) chloride are combined. The net ionic equation for this reaction is:
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09/21/19

Write a balanced nuclear equation for the alpha decay of americium-241. (Use the lowest possible coefficients. Omit states-of-matter.)
Write a balanced nuclear equation for the alpha decay of americium-241. (Use the lowest possible coefficients. Omit states-of-matter.)
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09/21/19

Write the balanced nuclear equation for the alpha particle bombardment of 23994 Pu. One of the reaction products is a neutron. (Use the lowest possible coefficients. Omit states-of-matter.)

Write the balanced nuclear equation for the alpha particle bombardment of 23994 Pu. One of the reaction products is a neutron. (Use the lowest possible coefficients. Omit states-of-matter.) 
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09/21/19

A bromine-80 nucleus can decay by gamma emission, positron emission, or electron capture. What is the product nucleus in each case?
A bromine-80 nucleus can decay by gamma emission, positron emission, or electron capture. What is the product nucleus in each case?
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09/21/19

The half-life of polonium-218 is 3.0 minutes. If you start with 30.0 g, how long will it be before only 2.0 g remains?
The half-life of polonium-218 is 3.0 minutes. If you start with 30.0 g, how long will it be before only 2.0 g remains?
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09/20/19

How many ml of 2.50 M NaOH are needed to react with 0.289 of o-toluic acid?
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09/20/19

If a projectile travels 3.00000 feet in one second, how far will it travel in 18 minutes

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09/20/19

What is the most stable monatomic ion formed from fluorine?
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09/20/19

Calculate the boiling point of a liquid
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 354.0 Torr at 45.0 ∘C.calculate the value of this liquid - kJ/molCalculate the normal boiling point of this liquid.- degress C
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09/20/19

Copper(II) acetate plus sodium sulfide yields copper(II) sulfide plus sodium acetate.
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09/19/19

A solution was made where 24.0 grams of glucose C6H12O6, were dissolved in 1.00 kg of water, the density of this solution was 1.07 g/mL

Find the molality of this sugar solution Find the mole fraction of the glucose Find the mole fraction of the waterFind the mass % of glucose in this sugar solution Find the molality of this solution
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09/19/19

Find the relative atomic mass of 25Mg
Naturally occurring magnesium has an atomic mass of 24.312 and consists of three isotopes. The major isotope is 24Mg, natural abundance 78.99%, relative atomic mass 23.98504. The next most abundant... more
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09/19/19

Chemistry molarity
Acid content in vinegar. 9.65 ml of 1.05 M NaOH is required to neutralize 10.00 ml of vinegar. Calculate the moles of NaOH.
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09/19/19

What is the volume of a piece of silver (Ag) that has a mass of 3.5 grams?
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09/19/19

Stock Solution of NaOH
A chemist makes a stock solution of NaOH by dissolving 950.0 grams in enough water to make 150.0 liters of solution. If, later on, the chemist wants to use this stock solution to make 200.0 ml of... more
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09/19/19

Which of the following contains maximum number of atoms?

A) 6 mol of sulphurB) 2.0 mol of S8C) 5.0 mol of S02D) 44.8 Dm3 of C02 at STP
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09/19/19

Which of the following notations is the correct noble gas configuration for Li
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09/18/19

Finding freezing point

One mole of sucrose C​​H​​O​​, a common sweetener is added to 1000 grams of water. What is the final freezing point of the solution in degrees Celsius (assuming the substance dissolves completely)?
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09/18/19

calculate the percent error if the experimental value of the density of zinc is 9.95 g/cm3.the accepted value is 7.13 g/cm3
it in an integrated science book 8th grade nos 18 the one with a bee
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09/18/19

a piper delivers 10.4 ,10.2, 10.8 ,9.6 ,and 10.6 mL in consecutive trials. Find the mean, volume,and the standard deviation using Microsoft excel
a piper delivers 10.4 ,10.2, 10.8 ,9.6 ,and 10.6 mL in consecutive trials. Find the mean, volume,and the standard deviation using Microsoft exceli need only in excel please help me 
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09/18/19

The density of ethyl alcohol (200 proof, or pure alcohol) is 0.789 g/mL at 20°C. Calculate the mass of a 19.6 mL sample. Enter your answer in the provided box.
The density of ethyl alcohol (200 proof, or pure alcohol) is 0.789 g/mL at 20°C. Calculate the mass of a 19.6 mL sample. Enter your answer in the provided box.
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09/18/19

what mass of carbon dioxide is consumed by the reaction of 4.9g of water
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09/18/19

Chemistry-Hess’s law
At the end of 2012, global population was about 7.0 billion people. What mass of glucose in kg would be n eeded to provide 1200 Cal/person/day of n ourishment to the global population for one year?... more
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09/17/19

How much energy is needed to heat up 240mL of ice cold water to body temperature after drinking it ?
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