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Question #0f3a3 - Socratic
The molecular weight of anhydrous sodium carbonate is 106 and the molecular weight of water is 18. Therefore, the formula for the molecular weight of N a2CO3XH 2O is 106 + 18X. Thus, by definition, one mole of N a2CO3XH 2O will have a mass of 106 + 18X.
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Tiffany has been dieting for 6 months. After 1 month Tiffany lost a ...
She loses 3.4 pounds per month. We want to calculate Tiffany's average rate of change of weight over a time period. To do this, we'll be employing the following formula: DeltaW = (W_f - W_i)/ (Deltat) ..where W represents the amount of weight Tiffany has lost at any given time. We know that she'd lost 8 pounds after 1 month, and 25 after 6. Therefore, we have an initial weight loss, final ...
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Is the weight of a 100-pound weight for 200 meters is ... - Socratic
Yes, the work done is zero in both cases. I assume the weights are carried horizontally. Since they do not gain any altitude, they have not gained any gravitational potential energy. Therefore, zero work is done carrying a mass horizontally. The work formula is "work" = F*d*costheta The force, F, would be vertical (opposing gravity) and the displacement, d, is horizontal. Therefore the angle ...
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How does buffering a solution change the solutions behavior? How does Benedict's solution change colour? Describe how would you prepare 1 L of a 1 M solution of sodium chloride. The gram formula weight of sodium chloride is 58.44 g/mol. How do solutions differ from suspensions? How does a solution differ from a compound? How can solutions be ...
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What is the molar mass of sodium carbonate, (Na2CO3)? - Socratic
Explanation: To calculate the molar mass of a compound, multiply the subscript of each element from the formula times the molar mass of the element. The molar mass of an element is its atomic weight (relative atomic mass) on the periodic table in g/mol.
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Question #4dd5f - Socratic
1.3 * 10^(23) "formula units" For starters, it's worth pointing out that you're not dealing with molecules of iron(III) fluoride here because this compound is ionic. So a more accurate statement here would be that the problem wants you to find the number of formula units of iron(III) fluoride present in that sample. Now, the key here is the molar mass of iron(III) fluoride, which you will find ...
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Question #2ba09 - Socratic
That’s an unusually small bird, but the physics remains constant. Power, P = F xx v but be careful, in this case the F is weight, w = mxxg [I think there may be a secondary problem underlying this, that the formula above is derived from power = work done / time = E/t = (vecF.vecs cos theta)/t and as the force (gravity) is perpendicular to the velocity (assumed horizontal) no work is done ...
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A balanced lever has two weights on it, the first with mass #66 kg ...
For this solution we will use the formula F_1d_1 = F_2d_2 Where Force times the distance of one side of the lever must equal the combination of the Force and distance applied on the opposite side of the lever. Force equals mass time gravity F = m*g F_1 = 66kg*9.81m/s^2 = 647.46 N F_2 = 9kg*9.81m/s^2 = 88.29 N d_1 = 1m d_2 = ?
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The atomic weight of a newly discovered element is 10.600 amu. It has two naturally occurring isotopes. One has a mass of 10.000 amu and a natural abundance of 70.000%. What is the isotopic mass of the other isotope? What does the atomic mass tell you?
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How do you find the mean of # {25,31,31,20,30,26,32,31,35}#?
But by how much? The one marble moved by 5, but its weight is only 1/9th of the total weight of all marbles. So, the centre of gravity will move 5 xx 1/9, which is 5/9, to the right. So you see, the mean of a dataset is like a weighted average of the set, but with all the weights the same.