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If the Molar mass of SiO2 is 60.09, and the mass of my stirring rod (sample) is 12.47 (g), how do I calculate the moles of the sample & the atoms of the elements involved?
although not a transition element, lead can form two cations: Pb2+ and Pb4+. write the formulas for the compounds of these ions with the chloride ion.
Neurospora is used as genetic material because A. it has short life cycle of 10 days B. the product of single meiosis can be easily analysed
completely evacuated and then filled with an unknown gas to a pressure of 747 mmHg at 22 degree C. If the glass bulb gained 0.103 g in mass, what is the molar mass of the gas?
How many moles of hydrochloric acid were added to the flask? The molar mass of hydrochloric acid is 36.3094 g/mol. Remember that the 6 M HCl solution was diluted by half with water. (molar mass = mass/moles) Choose the closest answer.A. 0.03 ..
a rotary drum filter with a filter area of 200 m2 and a vacuum pressure of 75 kpa is to be used to remove cells from a
Two gases, oxygen (28.8 grams) and carbon monoxide (19.0 grams), are confined in a container at a pressure of 640.0 torr. Calculate the partial pressure of carbon monoxide in torr.
Problem- Calculate the concentrations of total acetate ion for the 7 solutions below, prepared by mixing the specified volumes of .75 M acetic acid with .75 M sodium acetate, then diluting to 100.00 ml with water.
What's the energy difference between axial and equitorial conformation of hydroxycyclohexane. What is hydroxycyclohexane
Find the pH for the following two solutions: Solution 1- An aqueous solution that is 0.0500 M in HClO. Solution 2- An aqueous solution that is 0.0500 M in HClO and 0.0200 M in NaClO, the sodium salt of the conjugate base of hypochlorous acid.
The density of iron is 7.87 . What is the mass of a 4.00 4.00 1.00 block of iron? Express your answer to three significant figures and include the appropriate units.
A particular calorimeter is calibrated and is found to have a calorimeter constant, Ccal = 3.640 kJ/°C. When 1.500 g of an unknown hydrocarbon was combusted in the calorimeter
What is the wavelength, in nanometers, of the light emitted when the electron in a hydrogen atom drops from the energy level n_i = 12 to n_f = 5
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