Dimensional analysis & conversions. If you need scientific notation in you answer, copy this for the exponential part: "x10^". An example would be 6.022x10^23 for Avogadro's number. Your answers need to have the correct number of significant figures. How many moles of aluminum are in 8.09x1022 aluminum atoms?

Dimensional analysis & conversions. If you need scientific notation in you answer, copy this for the exponential part: "x10^". An example would be 6.022x10^23 for Avogadro's number. Your answers need to have the correct number of significant figures. How many moles of aluminum are in 8.09x1022 aluminum atoms?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter3: Mass Relations In Chemistry; Stoichiometry

Section: Chapter Questions

Problem 84QAP: Suppose that the atomic mass of C-12 is taken to be 5.000 amu and that a mole is defined as the...

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Suppose that the atomic mass of C-12 is taken to be 5.000 amu and that a mole is defined as the number of atoms in 5.000 kg of carbon-12. How many atoms would there be in one mole under these conditions? (Hint: There are 6.0221023 C atoms in 12.00 g of C-12.)
Assume that the ratio of moles of Cl to moles of Cu are 2.7. If we can represent the formula by CuClx, what is the value for x? Round your answer to the nearest whole number. Do NOT include units. So, if you think the formula is CuCl6, you enter the number 6.
I am having a bit of trouble with significant figures and rounding. In a question such as the one below, would the sig fig I put in my answer be correct? How many moles are present in 3.44 g CoCl2 ꞏ 6H2O? = (Which sig fig amount is correct-->) .0217 moles or .021 moles The whole answer was 0.02177904, would I round this answer to the 3rd sig fig? So, is the correct answer actually .022?
What is the mass in grams of 6.91x 1015 chromium atoms? Put your answer in box in scientific notation with one past the decimal in this format xx*10^-X As always, this may seem like the wrong sig figs, but this is how the formula questions work-I must choose one amount for everybody despite the amount of sig figs Canvas gives you
What is the mass, in kilograms, of an Avogadro’s number ofpeople, if the average mass of a person is 160 lb? How doesthis compare with the mass of Earth, 5.98 * 1024 kg?
The mole is a counting number that allows scientists to describe how individual molecules and atomsreact. If one mole of atoms or molecules is equal to 6.022 × 1023 atoms or molecules, how many moleculesare in a 23.45 g sample of copper (II) hydroxide, Cu(OH)2? (MM of Cu(OH)2 is 97.562 g/mol) Expressyour answer to the correct number of significant figures and you must show all work in the form ofdimensional analysis as shown in Lesson 4. You must solve the problems as they are taught in the course. 4.2 Counting particles of matter. Grams to moles of Copper Hydroxide to molecules of Copper Hydroxide.
A compound is isolated from the rind of lemons that is found to be 88.14% carbon and 11.86% hydrogen by mass. How many grams of C and H are there in 140.0g sample of this substance? Express your answers using one-decimal place separated by a comma.
0.848g of Na2B4O7.10H2O into a crucible. After hearing the sample for a short time and allowing the crucible to cool, the two students determine that the sample has a mass of 0.525g. They then do a quick calculation. based on this calculation, what should they do next?
Use the molar mass of Ca3(PO3)2 to calculate the number of formula units in 10.0 g of CP. Give your actual number. Use scientific notation with E representing the exponent and no spaces. For example, 1 mol = 6.022 x 1023 would be 6.022E23. (10.0 g CP)(––––––––––) = _________ mol CP (––––––––––) = _________ FU
An unknown sample was found to contain the following:10.62% H42.04% O47.34% CUse this information to determine the subscript x in the formula CxHyOz. Recall that the subscripts represent whole number ratios.
One mole (molecular equivalent) of gold has a mass of 196.9655 g. One mole of anything equals 6.022 x 1023 items of that thing, so in 1 mole of gold there are 6.022 x 1023 atoms. The diameter of a gold atom is 3.58 x 10-10 m. If a block of gold of a mass of 202.5 g is drawn into a very thin wire of single gold atoms laid end to end, how long would the wire be? Express your answer in kilometers.
a) What is the mass, in grams, of 5.000 moles of carbon atoms? b)What is the average mass, in grams, of a)one helium atom? b)one potassium atom? c. How many sodium atoms are there in 6.00 moles of sodium? d. a)How many moles of sodium atoms are there in100.0g of sodium?b)How many sodium atoms are there in100.0g of sodium? e. Calculate the number of moles in 50.7grams of hydrogen.