The nucleus is composed of protons and neutrons. a. e. C0.43H, How many grams are contained in a 0.893 mol sample of methane, CH4? m (As) = 238 mol As 74.922 g As/mol As 17300 g As (rounded to three significant figure) Your response is private Was this worth your time? b. an effective antidote for heavy metal poisoning (e.g., Pb2+ and Hg2+). Select one: d. I3+ d. the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a concave meniscus. All this works out two A mass of zero seven 4 to 0 .742g of magnesium sulfate. In this case, add up all the atomic masses in the chemical formula and divide by Avogadro's number. I~s-latarCon d-clvboj tta ( s.64 Splcce sf (edius der s'tj p aAd J^j ferm cheje 20e sphere tLee ou f side +4t? The molar mass of an element is found on the periodic table, and it is the element's atomic weight in grams/mole (g/mol). b. b. vapor pressure is equal to or greater than the external pressure. Select one: e. Pressure, An average Mastiff puppy weighs 2.72 kilograms. https://www.thoughtco.com/avogadros-number-example-chemistry-problem-609541 (accessed March 4, 2023). The density of magnesium is 1.7 g/cm3, and the density of iron is 7.9 g/cm3. . So first, we're gonna write, um, Thea appropriate reaction here so that we can know the extricate Emma tree between them. Therefore this resulting atomic mass is calculated from naturally-occurring isotopes and their abundance. d. alpha particle: 42He The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. c. BaO It makes working with atoms easier because we work with moles rather than individual atoms. Select one: Select one: Knowing that 57 g are made by fluorine, the unknown atom will count for 58.85 g in each mole. one mole = 6.0210 atoms So number of moles of arsenic are 1 mol. a. Cu c. 12.15 hence, mass of 1 atom of arsenic is 1.2441023 X 10-22. a. polybutylene. c. P The answer is rounded to three sig figs, the number of sig figs you have for the number of . a. DNA So because the masters of both reactions are given, there is a possibility that one of them can limit the mass of magnesium self that can form in the end. So the number of moles of magnesium sulfate will be equal to one times the number of moles of magnesium hydroxide. Select one: e. Period 1, Which of these scientists developed the nuclear model of the atom? So the mess off hydrochloric acid equals through the most of hydrochloric acid. The compound contains 58.37 mass percent bromine. Select one: By definition, one atom of carbon-12 is assigned a mass of exactly 12 atomic mass units ( amu). So, we need to multiply here by the molar mass of magnesium sulfite Which is 1- 0.36 g per mole. b. polystyrene. Select one: Which one of these species is an ion? b. Hexane-benzene c. amine. A. calculate the normal force. d-Calculate the mass in grams of one calcium atom. If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield? 1. a. Srxn > 0, Hrxn > 0 a. Arsenic, Smaller mass is 74.9 grams per mole. b. C)Ionization Energy . This means that if you have 3x10 24 atoms of chlorine, it is the same as having 176.6 grams of chlorine. e. Prediction, Which of the following cannot be separated into simpler substances by chemical means? Round The original measurement of atoms (4.83 10 ) has 3 significant figures, so our answer must have the same. b. Consider a block of iron with a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron? How are these different mutations thought to account for the different disease symptoms?
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