what is the mass of 40.34x1023 H2 molecules ar STP?

Q: What mass of S is needed to completely react with 1.45 g of Ca to make 2.61 g of CaS? 8Ca + S8 = 8…

A:

Q: It is estimated that we breathe around 5.0 x 1021 molecules of 0, in a single breath. What mass of…

A: Given: Molecules of O2 in a single breath = 5.0 × 1021. Molar mass of O2 = 32 g/mol

Q: what is the weight in grams of 4.30 x 10^14 CF4 molecules?

A:

Q: How many grams of HC2H3O2 are there in 3.6moles of HC2H3O2?

A: Given: Moles of HC2H3O2= 3.6

Q: A 2.500g sample of an unknown hydrocarbon (CxHyOz) is put in a combustion chamber. From the…

A: We have to calculate the mass of O .

Q: which of the following are true for 1 mole of water at room temperature (approximately 24 degrees…

A: 1. The molar mass of water is 18.01 g/mol. This means 1 mole of water has a mass 18.01 g. So, first…

Q: Determine the molar mass of Al₂(SO₄)₃･5H₂O

A: molar mass of Al₂(SO₄)₃･5H₂O. The molar mass can be calculated, first of all. Write individual…

Q: How much does 1.29x10^25 particles of HCl weigh? Round to 2 decimal places.

A: In this question, we will determine the weight of the given particle HCl in the given number of…

Q: Convert 6.92 x 1024 molecules of CO2 to grams CO2.

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: what mass of sodium is also produced?

A: Given :- 2Na3N → N2 + 6Na  Mass of N2 produced = 29.7 g  To calculate :-   Mass of sodium (in g)

Q: What is the molar mass of K2CO3?

A: Molar mass of a compound is the sum of masses of all atoms present in that compound.

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

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Q: Guaifenesin (C1oH1404) is a common over-the-counter expectorant. What mass (in g) of oxygen is…

A: The objective of this question is to find out the mass of oxygen in a 200 mg dose of Guaifenesin. To…

Q: What mass of Ca(NO3)2 is required to prepare a solution containing 0.595 mol of Ca(NO3)2?

A: For determination of the mass of Ca(NO3)2 needed for a solution with 0.595 moles of Ca(NO3)2, we…

Q: How many molecules are there in 54.6g of PF3? You will need to divide your answer by 1.0x10^23

A: Since we know that 1 mole of PF3  will contain 6.023 * 1023 molecules  i.e. is  equal to Avogadro no

Q: If the decomposition of a sample of KClO3 produces 3.29 g of  O2, what was the mass (g) of the…

A: Write balanced equation

Q: If we read 45 molecules of O2 with hydrogen according to the equation 2H2+O2=2H2O. How many…

A: Suppose a balanced chemical equation  aA + bB –>c C Then,  a molecules of A produces c molecules…

Q: Given the chemical equation: B₂H₆ + 6H₂O → 2H₃BO₃ + 6H₂, how grams of water is 30 mole of hydrogen?

A: According to the given chemical reaction, 6 moles of H2 is given by 6 moles of H₂O. 1 mole of H2 is…

Q: What is the percent (by mass) water CaSO4.2H22O?

A: Here, we have calculate % by mass of H2O in CaSO4.2H2O.

Q: What is the mass % of H in C9H10N2?

A: Mass percentage is a kind of expressing the concentration of a solution. It gives an information…

Q: If 33.3 grams of hydrogen gas were mixed with 45.55 grams of nitrogen gas, then how many grams of…

A: Nitrogen gas reacts with hydrogen gas to form ammonia. The equation for the balanced chemical…

Q: How many hydrogen atoms are in 3.10×1025 water molecules?

A: The objective of this question is to find out the number of hydrogen atoms in a given number of…

Q: A 2.00 g sample of methamphetamine was found to contain 1.61gC, 0.203gH and 0.188 g N. What is its…

A: Given : Mass of C = 1.61 g Mass of H = 0.203 g Mass of N = 0.188 g Assuming the empirical formula of…

Q: Calculate the molar mass of a sample containing 34 molecule that weighs 7X 10^-22 g.

A: Given :  Number of molecules = 34  Mass of sample = 7 × 10-22 g  To calculate :-  Molar mass of…

Q: How many molecules of sugar would be contained in a teaspoon of sugar if it's mass is 8.5g. 11.

A:

Q: There are 12.6 grams of sugar. With the molecular formula C12H22O11, what is the molar mass of this…

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Q: What is thé mass percentage of C in codeine, C18H21NO3? Provide an answer to two decimal places.

A: Given : We have to calculate mass percentage of carbon in codeine.

Q: Equivalent weight of Al(OH)3 is а. 26 g O b. 27 g С. 78 д O d. 39 g

A:

Q: If 1.23 x 1024 molecules of a substance have a mass of 68.2 g, what is the molar mass of the…

A: Given Data: The mass of the substance is 68.2 g.

Q: If the decomposition of a sample of KCIO3 produces 3.29 O2 what was the mass (g) of the original…

A: The decomposition of KClO3 in presence of heat give product KCl and O2. Hence,the chemical reaction…

Q: If 8g of element Q contains 1.204 X 1023 mol-, calculate the relative atomic mass of element Q.…

A:

Q: a certain protein has a molar mas of 2.88 x 10^5 g. what is the mass of the molecule of this protein

A: Given: Molar mass  of Protein = 2.88 x 105 g.  1 mole = 6.022 X 1023  molecules

Q: How many moles of hydrogen carbonate need to decompose to produce 8.70 x 1023 molecules of carbon…

A: Hydrogen carbonate = HCO3- Decomposition reaction of hydrogen carbonate occurs with H+ - HCO3- + H+…

Q: moles

A:

Q: What is the conversion factor for converting 2.77X10^23 particles of CaBr2 to mass

A: The number of particles of CaBr2 is = 2.77×1023 The conversion factor of these particles to mass =?

Q: What is the molar mass of CH3OH?

A:

Q: a 5.000g sample that contained NaCl and BaCl2 *2H2O was heated. After heating the sample had a…

A: Given : Mass of sample of NaCl and BaCl2*2H2O = 5.000 g And mass of sample after heating = 4.688 g

Q: Which element comprises the lowest percentage composition in C12H22O11? Write that element's…

A:

Q: How many moles are in 102.99 g of Fe3(PO4)2?

A:

Q: What is the mass in grams of 5.57 * 10^15 molecules of NO2

A: A numerical problem based on mole concept, which is to be accomplished.

Q: If 6 moles of Si and 6 moles of N2 are combined in a reaction flask, what remains in the reaction…

A:

Q: What is the mass of 0.5 mole of nitrogen gas? O 1.20 x 1023 O 28.0 g O 14.0 g O 6.02 x 1023 3.01 x…

A: The mass of one mole of the substance is called molar mass. Therefore, the mass of any substance is…

Q: 8) How many moles of NO will contain 7.89 × 1020 m

A: One mole of any compound contain Avagadro number of molecules. Avagadro No. (Na) = 6.022 × 1023

Q: What is the mass of 3.5 x 10^-3 molecules of copper (II) carbonate? Use correct significant figures…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: See the example in Introduction for set-up of calculations. Calculate the number of a) moles of F b)…

A: Number of moles is given by the ratio of mass of the substance to that of the molar mass of the…

Q: What is the mass percentage of Na in NaF?

A: The mass percent of an element is defined as the mass of that particular element present in the…

Q: Ascorbic acid (C₆H₈O₆) is also known as Vitamin C. What quantity in molecules of C₆H₈O₆ does a…

A: To find molecules of vitamin C, first convert mass in grams then divide it by molar mass to get its…

Q: Molar Mass Number of Representative Particle Mass Substance Number of moles (g/mol) (9) Particles

A:

Q: In this reaction, 22.7 g of lithium nitrate reacts 16.5 g of barium sulfate. What will be the mass…

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.