A student is running an experiment in which 67.2 grams of CaSeO4 is needed, but the only jar of reagent in the lab is labelled calcium selenate dihydrate. How many grams of the hydrate must the student weigh out in order to get the desired amount of the anhydrous compound?

Q: The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of…

A: 1 molecules of chalcopyrite contains 1 atom of copper. Mole of Cu to be obtained may be calculated…

Q: How many molecules of hydrogen chloride (HCI) are there in 25.0 g of hydrogen chloride? (Given: H=…

A:

Q: Calculate the mass of 3.62 × 1 0 24 molecules of glucose( C 6 H 12 O 6 ).

A: To calculate the molar mass of any molecule. We must know about the molar masses of the individual…

Q: Calculate the mass in grams of 1.10 x 1024 molecules of Sulfane, H2S. g NA= 6.022 x 1023

A:

Q: what is the mass of 4.50 × 1025 O3 molecules?

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: What was the percent of potassium chlorate in the mixture

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Q: What mass of ammonia gas (NH3) contains 2.8*10^24 hydrogen atoms?

A:

Q: Ascorbic acid (C₆H₈O₆) is also known as Vitamin C. How many molecules of C₆H₈O₆ does a Vitamin C…

A:

Q: Anhydrous CuSO4 can be used to remove water (an impurity) from gasoline. When the CuSO4 absorbs the…

A: Reaction corresponding to absorption of water by copper sulfate is: CuSO4+5H2O→CuSO4.5H2O Hence, 1…

Q: Silane, SiH4, is prepared according to the following equations: Si(s)  +  3 HCl(g)  →  HSiCl3(l)  +…

A: Si(s)  +  3 HCl(g)  →  HSiCl3(l)  +  H2(g) 4 HSiCl3(l)  →  SiH4(g)  +  3 SiCl4(l)  2.42 moles of…

Q: What is the mass in grams of 7.3 x 1024 molecules of lactic acid (C3H6O3), the compound responsible…

A: Given;

Q: How many grams of hydrogen are there in 55.1 g of CH3(CH2)4OH?

A: Given: Mass of CH3(CH2)4OH is 55.1 g Known: Molar mass of C = 12.01 g/mol Molar mass of H = 1.008…

Q: What is the mass of 2.9 × 10^26 molecules of dinitrogen pentoxide, N2O5(g)?

A: Molecules of N2O5 = 2.9 x 1026

Q: Quartz, SiO2, contains 46.7% silicon. What mass of silicon is present in 370 g of quartz?

A: To solve this problem we have to calculate the mass of silicon present in quartz .

Q: Calculate the mass in grams of 3.07×10243.07×1024 molecules of propane. The chemical formula for…

A: Given that : The number of molecules of propane = 3.07×1024 The chemical formula for propane is…

Q: If an air conditioning unit is charged with 4.9 x 1023 molecules of R-113 (C5Cl3F6), what mass of…

A: Given : Number of molecules of C5Cl3F6 = 4.9 X 1023

Q: A sample of CO2 has a mass of 50.0 grams. What is the number of molecules of carbon dioxide in the…

A: We know,Number of mole = mass of sample (g)molar mass (gmol-1)and1 mol = 6.022x1023 molecule

Q: Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means…

A:

Q: A sample of rubbing alcohol solution contains ethanol, C2H5OH(l). If the sample contains 1.25 × 1023…

A: Given;

Q: Cobalt(II) chloride forms several hydrates with the general formula CoCl2·xH2O, where x is an…

A:

Q: What is the mass in grams of 5.57 × 10¹⁵ molecules of SO₂?

A: We know that , 1 mole = 6.023x1023molecules/atoms/ions.1 mole = molar mass of molecule .6.023x1023…

Q: Lithium faces an increasing demand since the alkali metal is a key component in a lithium- ion…

A: Given  Number of moles of lithium = 5.40 mol we have to calculate the weight of lithium. Molar mass…

Q: A balloon filled with neon gas, Ne, contains 9.870 x 1025 atoms. Use the molar mass of neon, 20.18…

A: Given,number of atoms of neon ( Ne ) gas = 9.870 x 1025 atomsmolar mass of Ne = 20.18 g/mol

Q: How many moles would 1.00 x 10^23 molecules of methane(CH4) represent

A: Given  Number of molecule of CH4  = 1 × 1023 molecule  Number of mole = ?

Q: Calculate the amount of  anions (in moles) in 8.6 g of magnesium perchlorate. Express your answer…

A: Magnesium perchlorate, Mg(ClO4)2 dissociates into three ions as given by the equation: Mg(ClO4)2 →…

Q: A lawn fertilizer is rated as 7.55% nitrogen, meaning 7.55 g of N in 100 g of fertilizer. The…

A: Given, A lawn fertilizer is rated as 7.55% nitrogen, meaning 7.55 g of N in 100 g of fertilizer. The…

Q: A 3.06 mg sample of a compound containing carbon, hydrogen, and oxygen underwent combustion…

A: Empirical formula: Formula containing atoms in smallest possible integer ratio Molecular formula:…

Q: What is the mass, in grams, of 1.311x10^24 molecules of Naproxen, C14H13NaO3

A:

Q: Vitamin B12 , cyanocobalamin, is essential for human nutrition. It is concentrated in animal tissue…

A: The molar mass of cyanocobalamin is calculated using cobalt’s molar mass in step two.

Q: The molecular formula of allicin, the compound responsible for the characteristic smell of garlic,…

A: Since , Molar mass of carbon atom = 12.0107 g Molar mass of hydrogen atom = 1.00784 g Molar mass of…

Q: What is the mass, in grams of 9.47*10^24 molecules of methanol?

A:

Q: Seoyeon needs to determine the formula of an unknown hydrate (AB-XH2O). Given the following data:…

A: Given: Hydrated salt AB.xH2O

Q: A sugar crystal contains approximately 2.0×10^17 sucrose (C12H22O11) molecules. What is its mass in…

A: A mole refers to the amount of substance which contains as many as toms or molecules as are present…

Q: What is the volume (in mL) of isopropanol that contains 7.23 × 1022 molecules of isopropanol? The…

A: