09/18/20
Rank the elements in the table below in order from least to greatest number of atoms.
Element: Mass:He 12.9Be 15.9Mg 36.4Ca 87.2The atoms that I calculated:1.94x10^24 He1.06x10^24 Be9.03x10^23 Mg1.31x10^24 CaBut I am unsure on how to rank them least to greatest.
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09/18/20
How to solve the this chemistry question
You have a copper cylinder at room temperature (30ºC). You find that the diameter of the copper cylinder is 4.52 cm and the mass of the cylinder is 95.6754 g. What is the length (h) of the copper...
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09/18/20
Molar Freezing Point Depression Constant
A solution that contains 15.581 grams of benzene (molar mass = 78.1 g/mol) in 420g of cyclohexane freezes at a temperature of 9.50 degrees celsius below the freezing point of pure cyclohexane....
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09/18/20
A chemist needs 1.00 L of an aqueous 0.200 M K2Cr2O7 solution. What mass of solid must be weighed out to make this solution?
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09/18/20
Typical blood serum is about 0.14 M NaCl. What volume of blood contains 1.0 mg NaCl?
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09/18/20
Calculate the number of moles of Cl- ions in 1.75 L of 1.00 x 10-3 M ZnCl2 solution
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09/18/20
Calculate the concentration of a solution made by dissolving 45.6 grams of Fe2(SO4)3 to 475 mL What is the concentration of each ion?
please show work for better understand :)
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09/18/20
F is the symbol of fluorine what do 2F ,F2 2F2
F2 is the symbol of fluorine what do F2,2F,2F2
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09/18/20
A balloon has an initial volume of 500 mL at 1 atm. The pressure is doubled to 2 atm. The new volume will be __________ mL.
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09/18/20
A balloon has an initial pressure of 2 atm. The pressure is changed to 1 atm and the volume changed to 400 mL. What was the initial volume?
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09/18/20
The relationship of the Volume of a gas to the Pressure (known as __________ Law) states that if you increase the Pressure of a gas, the Volume will ____________. *
A. Boyle's law; IncreaseB. Boyle's law; DecreaseC. Charles' Law; IncreaseD. Charles' Law; Decrease
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09/18/20
A gas system has initial pressure and volume of 6790 torr and 8.32 L. If the volume changes to 25300 mL, what will the resultant pressure be in atm?
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09/18/20
A gas system has an initial temperature of 119 C with the volume unknown. When the temperature changes to 255.0 K the volume is found to be 6.37 L What was the initial volume in L?
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09/18/20
A gas system has initial volume and temperature of 7.07 L and 24.8 C. If the temperature changes to 230.0 K, what will the new volume be in mL?
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09/18/20
A gas system has an initial pressure of 5590 torr with the volume unknown. When the pressure changes to 4.29 atm the volume is found to be 10.4 L What was the initial volume in mL?
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09/18/20
To solve for the new (second) temperature value in Charles' Law, which is the correct way to isolate for T2?
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09/18/20
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s) →2K2O(s) + 2N2(g) + 5O2(g)
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s) →2K2O(s) + 2N2(g) + 5O2(g)To produce 67.9 kg of O2, how many (a) moles of KNO3 must be...
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09/18/20
Calculate the number of moles of solute in 154.8 L of 0.675 M sodium cyanide.
Calculate the number of moles of solute in 154.8 L of 0.675 M sodium cyanide._______ moles of solute
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09/18/20
How many moles of H+ ions are present in 871 mL of 0.942 M nitric acid solution?
How many moles of H+ ions are present in 871 mL of 0.942 M nitric acid solution? ______ mol H+
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09/18/20
How many bonding electrons are present in a molecule of HNO3?
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09/18/20
Give the formula of each of the following ionic compounds from its name: aluminum perchlorate
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09/18/20
Chemistry 1101 - What is the formula of the substance composed of one phosphorus atom and five chlorine atoms?
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09/18/20
Determine the mass of the solid given its density is 2.50 g/mL.
A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 86.0 mL.The liquid solvent has a mass of 22.3 g and a density...
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09/18/20
Charlotte is driving at 74.3 mi/h and receives a text message. She looks down at her phone and takes her eyes off the road for 4.27 s. How far has Charlotte traveled in feet during this time?
Charlotte is driving at 74.3 mi/h and receives a text message. She looks down at her phone and takes her eyes off the road for 4.27 s. How far has Charlotte traveled in feet during this time?
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