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To determine the number of moles in 20g of sodium hydroxide, you need to divide the given mass by the molar mass of sodium hydroxide. The molar mass of NaOH is 40 g/mol (sodium: 23 g/mol, oxygen: 16 g/mol, hydrogen: 1 g/mol). So, 20g NaOH / 40 g/mol = 0.5 moles of sodium hydroxide.
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What is the normality of a solution of sodium hydroxide with a molecularweight of 40grams containing 20grams in 100ml of solution?
The molarity of a sodium hydroxide solution with a molecular weight of 40g containing 20g in 100ml of solution can be calculated as follows: Moles of NaOH = Mass of NaOH / Molecular weight of NaOH = 20g / 40g/mol = 0.5 moles Molarity = Moles of solute / Volume of solution in liters = 0.5 moles / 0.1 L = 5 M Therefore, the normality of this solution would be 5 N as normality is equal to molarity multiplied by the number of equivalents per mole of solute for sodium hydroxide, which is 1.
How many moles of so3 are in 20g of so3?
To find the number of moles, you first need to calculate the molar mass of SO3, which is 80.06 g/mol. Then, you can use the formula: moles = mass / molar mass. Thus, for 20g of SO3, you would have 20g / 80.06 g/mol = 0.25 moles of SO3.
How many moles of B in 20g of borax?
To calculate the number of moles in 20g of borax (Na2B4O7), we first need to find the molar mass of borax. By adding the atomic masses of all the elements in borax, we get a molar mass of approximately 201.22 g/mol. Then, we use the formula: moles = mass / molar mass. Substituting in the values, we find that there are approximately 0.10 moles of borax in 20g. Since there are four boron atoms in one molecule of borax, the number of moles of B (boron) would be 0.10 moles * 4 = 0.40 moles.
A solution of NaOH contains 20g of this compound in 2dm3 of this solution . What is molarity of this solution?
This sodium hydroxide solution has a molarity of 0,25.
How many atoms of nitrogen are in 20g of NH4NO3?
To find the number of atoms of nitrogen in 20g of NH4NO3, first calculate the molar mass of NH4NO3 (80.043 g/mol). Next, divide the mass of NH4NO3 by its molar mass to find the number of moles (0.2496 mol). Finally, multiply the number of moles by Avogadro's number (6.022 x 10^23) to determine the number of atoms of nitrogen (1.50 x 10^23 atoms).
What is the normality of a solution of sodium hydroxide with a molecularweight of 40grams containing 20grams in 100ml of solution?
The molarity of a sodium hydroxide solution with a molecular weight of 40g containing 20g in 100ml of solution can be calculated as follows: Moles of NaOH = Mass of NaOH / Molecular weight of NaOH = 20g / 40g/mol = 0.5 moles Molarity = Moles of solute / Volume of solution in liters = 0.5 moles / 0.1 L = 5 M Therefore, the normality of this solution would be 5 N as normality is equal to molarity multiplied by the number of equivalents per mole of solute for sodium hydroxide, which is 1.
How many moles in 20g of magnesium nitrate?
There are 0.13 moles in 20 grams of magnesium nitrate.
How many moles of so3 are in 20g of so3?
To find the number of moles, you first need to calculate the molar mass of SO3, which is 80.06 g/mol. Then, you can use the formula: moles = mass / molar mass. Thus, for 20g of SO3, you would have 20g / 80.06 g/mol = 0.25 moles of SO3.
How many moles of B in 20g of borax?
To calculate the number of moles in 20g of borax (Na2B4O7), we first need to find the molar mass of borax. By adding the atomic masses of all the elements in borax, we get a molar mass of approximately 201.22 g/mol. Then, we use the formula: moles = mass / molar mass. Substituting in the values, we find that there are approximately 0.10 moles of borax in 20g. Since there are four boron atoms in one molecule of borax, the number of moles of B (boron) would be 0.10 moles * 4 = 0.40 moles.
A solution of NaOH contains 20g of this compound in 2dm3 of this solution . What is molarity of this solution?
This sodium hydroxide solution has a molarity of 0,25.
Which has more molecules 16g of CO or 20g of N2?
There are 6.023x10^23 molecules in one mole of a compound. So now, you have to find how many moles of each compound you have. CO's molecular weight is (12+16) = 28 g/mol N2's molecular weight is (14+14) = 28 g/mol So you find the moles of each. moles of N2 = 20g/ 28g/mol = .714 moles moles of CO = 16g / 28 g/mol = .571 moles So, N2 has (.714 *6.023x10^23) has 4.3 x10^23 molecules and CO (.571 *6.023x10^23) has 3.4x10^23 molecules. So, 20g of N2 has more molecules than 16g of CO
How many moles are in 3 moles of HF?
Moles = Mass/Molar Mass.Using this equation, we can take 25/(1.0 + 19) and find that it is equal to 1.25 moles.Keep in mind that very few significant figures were used for this example (2), and that if accuracy is to be expected, as many as possible should be used.
0.5 N sodium hydroxide how to prepare?
Weigh 20g. sodium hydroxide pillets pour it into a clean and dry 1L measuring flask. Dilute it with 200 mL of distilled water vith vigourous shaking, then dilute with distilled water up to the mark of 1000mL. Stand it for few hours. Check, it should be clear solution and then standardise it with potassium hydrogen phthallate OR oxalic acid.
How many atoms of nitrogen are in 20g of NH4NO3?
To find the number of atoms of nitrogen in 20g of NH4NO3, first calculate the molar mass of NH4NO3 (80.043 g/mol). Next, divide the mass of NH4NO3 by its molar mass to find the number of moles (0.2496 mol). Finally, multiply the number of moles by Avogadro's number (6.022 x 10^23) to determine the number of atoms of nitrogen (1.50 x 10^23 atoms).
How many grams of naoh are needed to prepare 500ml of 125M naoh?
I think you may have missed a decimal point somewhere. 125M of NaOH would be a solution of sodium hydroxide containing 125 moles per litre. One mole of a compound is the same number of grams as the molecular weight of the molecule. Sodium hydroxide has a molecular weight of 40 ( sodium 23, oxygen 16, and hydrogen 1), so a one molar solution would have forty grams of NaOH per litre. 500ml of a 1M solution would contain 20g. 500ml of a 125M solution would need 2 500g. 1L of a 125M solution would need 5 000g of sodium hydroxide in the litre. The maximum solubility for NaOH in water at 20 degrees is 1110g per litre, so if you tried to dissolve 5 000g in a litre you would be left with 3 890g undissolved. A 1.25M solution would have 1.25 times 40g per litre, which is 50g per litre. 500ml of this solution would have half this amount of NaOH, or 25g.
What is the amount of H2O molecules in 20g of CuSO4.5H2O?
To find the number of water molecules in 20g of CuSO4.5H2O, we first need to calculate the molar mass of CuSO4.5H2O. The molar mass of CuSO4.5H2O is 249.68 g/mol. Then we can use the molar mass of CuSO4.5H2O to find the number of moles in 20g. Finally, as there are 5 water molecules in one formula unit of CuSO4.5H2O, we can calculate the number of water molecules corresponding to 20g of CuSO4.5H2O.
What is alkaline nasal wash?
An alkaline nasal wash is a solution that has a higher pH level, typically created by adding baking soda to water, used to rinse out the nasal passages. This type of nasal wash is believed to help soothe irritated nasal linings and clear out mucus. It is often used as a natural remedy for conditions like allergies, sinusitis, and congestion.
