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1.Convert to common units then can divide 90g by 0.09 kg:1 kg = 1000 g→ 0.09 kg = 0.09 x 1000 g= 90 g→ 90 g ÷ 0.09 kg = 90 g ÷ 90 g= 1.
90 g is less than 9 kg
3 g under the 4 kg then go over to the next side write 90 g under the 05 g that equals 915 g because you are not going to get 9 in it so don't think i did it wrong.
4.05 kg - 3.09 kg = 0.96 kg (960 g)
The coefficients in a chemical equation represent the amount of moles of each substance involved in the reaction. On a smaller level, it also represents the amount of particles that have to collide or are produced in the reaction. Consider the following example: CH4(g) + 2O2(g) (arrow) 2H2O(l) + CO2(g) The coefficent behind oxygen in the reactants means that 2 molecules of oxygen have to collide with 1 molecules of methane to react. The coefficients in the products mean that this reaction produces 2 molecules of water and 1 molecule of carbon dioxide.
Steam is just water. Water weighs the same per molecule regardless whether it is ice, water, or steam. That said, the molecular weight of water is right at 18 g/mole. So it seems that 9.0 grams of steam is about half a mole of water. Therefore we just divide avagrado's number by 2 and we get: 6.022 x 1023 / 2 = 3.011 x 1023 molecules
The number of molecules is 6,3985.10e24.
The number of molecules of 140g of CO is 3.01x10^24 molecules of CO. CO is Carbon monoxide, with the mono meaning one. It's molar mass is 28.01 g/mol.
The number of molecules is 2,308.10e23.
Ethanol molar mass: 46,07 gWater molar mass: 18 gAvogadro number: 6,02214129.10 ex.2346,07 g--------------Avogadro number=number of molecules60 g------------------xx = 60 . A/46,07 = 7,842.10 ex.23 molecules of ethanol18 g--------------Avogadro number=number of molecules60 g------------------xx = 60 . A/18 = 20,074.10 ex.23 molecules
[10.0(g) / 18.0(g/mol H2O)] * 6.02.10+23(molecules/mol) = 3.34.10+23 molecules in 10 g of H2O(never mind the physical state: solid, liquid, vapor; it's all 10.0 grams of it)
Water to steam. Think about the bonds. In melting, you are breaking some bonds, but on the whole you still have one group of molecules. In vaporizing, the molecules must break away from the group completely. It is much harder to accomplish this than it is to melt.
The molar mass of water (H2O) is approximately 18 g/mol. To calculate the number of molecules in 12.5 g of water, we need to convert grams to moles by dividing by the molar mass. 12.5 g / 18 g/mol = 0.694 moles. Since 1 mole of any substance contains 6.022 x 10^23 molecules (Avogadro's number), multiplying 0.694 moles by Avogadro's number gives us approximately 4.18 x 10^23 molecules of water in 12.5 g.
The number of nitric acid molecules is 28,6723.10e23.
The number of ammonia molecules is 59 720.10e23.
To determine the number of molecules in 10.0 g of C8H8O3, we need to calculate the number of moles first. The molar mass of C8H8O3 is 152.15 g/mol. By dividing 10.0 g by the molar mass, we find that there are approximately 0.0658 moles of C8H8O3. To convert moles to molecules, we multiply the number of moles by Avogadro's number, 6.022 x 10^23, giving us about 3.96 x 10^22 molecules.
The number of molecules of 140g of CO is 3.01x10^24 molecules of CO. CO is Carbon monoxide, with the mono meaning one. It's molar mass is 28.01 g/mol.