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How many moles of ethanol C2H5OH are in a sample which weighs 39.2g?
Because the formula shows that each molecule of ethanol contains 2 atoms of carbon, 6* atoms of hydrogen, and 1 atom of oxygen, the gram molecular mass of one mole of ethanol is the sum of twice the gram atomic mass of carbon, 6 times the gram atomic mass of hydrogen, and the atomic mass of oxygen: 46.07. Therefore, 39.2 grams of ethanol constitutes 39.2/46.07 or 0.851 mole, to the justified number of significant digits. ________________ The subscript 5 immediately after the first appearance of the atomic symbol for hydrogen in the formula, plus the implied subscript 1 of the second appearance of the atomic symbol for hydrogen in the formula.
If the substance has a molar mass of 160 plus 5 grams per mole what is its molecular formula?
To find the molecular formula, you need the empirical formula and molar mass. If the molar mass is 160 plus 5 grams per mole, the molecular formula cannot be determined without additional information about the empirical formula's molar mass relationship.
What is the mass number of a atom?
the mass number is number of protons in an atom, plus the number of neutrons.
What is the percentage of water in Sodium Sulfate Decahydrate?
55.91% The mass of NaSo4 is 142.05 plus the mass of 10 H2O molecules (180.16) is 332.21. Divide the mass o water overthe total mass to get .5591 or 55.91%
The mass number is .?
The mass number of an atom is the sum of the number of protons and neutrons in its nucleus. It is represented by the symbol "A" in the notation of X^A_Z, where X is the element symbol, A is the mass number, and Z is the atomic number.
A container has a mass of 150 g what is mass of a liquid if the container plus the liquid has a mass of 185?
If a container has a mass of 150g and the mass of the liquid plus the container is 185g, then the mass of the liquid is 35g.
What is the mass of a liquid if the container plus the liquid has a mass of 220g?
220 grams, minus whatever the mass of the container is.
A beaker has a mass of 200 grams what is the mass of a liquid if the beaker plus the liquid have a mass of 286 gram?
86 g
How much does 100 milliliters of water weigh with a 10 gram container?
110 grams 1 milliliter of water is 1g. 100 of them is 100g plus a ten gram container is 110g
What is the mass of 750 ml of water plus the 89 gram mass of the glass bottle?
889g from lucy masseto
What does it mean to zero an electronic balance?
Usually you add a container to the balance then zero it. Then when you add something to the container e.g. a liquid or solid then when you place the container back on the balance the reading shows you how much you have added. Saves having to work out how much you added by weighing the container, weighing the container plus contents and then subtracting. Removes one possible source of error i.e. incorrect subtraction of values. Also faster/easier when trying to measure out a specific amount of a substance.
Why do you need to measure the mass of a empty graduated cylinder first?
What you really need to know is the mass of the liquid. You'll most likely measure itby weighing the liquid when it's in the container. The weight you measure will includethe weight of the container, and you'll have to subtract that away in order to knowthe weight of the liquid alone.If you can figure out a way to weigh the liquid when it's out of the container, thenyou'll never need to do anything about the mass of the container, not even measure it.
What happen to the mass of water in a hermetically sealed container is transported from the Earths surface to the moons surface?
The mass (amount) of the water in the container doesn't change, no matter where it goes. The water might change state, say from liquid to solid (ice) during the voyage, depending on what vehicle was used to carry the container. The container could be distorted or ruptured by such a state change, allowing some or all of the water to escape. If some of the water were to escape from the hermetically sealed mayonnaise jar, the sum total of the mass of the water remaining in the jar plus the mass of the portion that escaped would still be equal to the mass of everything that was in the jar when it was sealed.
If a water-filled container holds a liter of water what is a good estimate of its weight?
Water has a density of approx 1kg/l (or 1g/ml) so 1 litre has a mass of approx 1 kg. The total mass of the water and container will be the mass of the water plus the mass of the container. If it is a plastic container it will have negligible mass and so the total mass will be approx 1 kg.
What is the meaning of gross mass?
It usually refers to the mass of an object together with its container. For example the gross mass of a tin of soup will be the mass of the soup plus the mass of the tin. As a consumer, you will probably be interested in only the net mass - the mass of the soup - but for the haulier it is the gross mass that matters. For something like breakfast cereal the mass of the container may well be a significant proportion of the gross mass.
Is streptococcus viridans gram plus or gram?
Gram positive
4mg plus 2.5ml equals?
4mg plus 2.5ml. There is no way to get a measure of mass converted to a measure of liquid and vice versa.
