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An element is diamagnetic if it has no unpaired electrons. Anelement is paramagnetic if it has unpaired electrons. If sulfur has unpaired electrons in the last p orbital (1s22s2 2p6 3s2 3p4), why is it diamagnetic instead of paramagnetic?
The final temp of the water is 30.8 C. Calculate the mass of water in calorimeter
A mixture of gases contains 8.10 g of N2, 1.90 g of H2, and 3.50 g of NH3. If the total pressure of the mixture is 2.60 atm, what is the partial pressure of each component?
Determine the pH of the solution containing 8*10^(-3) M each of HF and NaF. Assume that NaF dissociates completely. Acid Dissociation constant for HF is Ka=6.3*10^(-4).
Calculate the mass of nitrogen dissolved at room temperature in an 81.0L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78.
Elemental exonium (not a real element) consists of two major isotopes Abundance Mass 59% 94 amu 41% 112 amu What is the atomic weight for exonium? Answer in units of amu
The decay constant for strontium- 90 is 0.0247 y^-1. how many grams of strontium-90 remain if 10.0g decay for exactly 60 years.
If it is known that 41.6 grams of PURE ELEMENT THAT IS NOT DIATOMIC represents 1.30 moles of this element, what is the atomic mass of the element?
1.write a balanced equation for the reaction of copper with concentrated nitric acid to form copperii nitrate. assume
Assume that the H2O2 solution has a density of 1.0g/cm3. What would the mass of 35cm3 of the H2O2 solution be?
An ingot of copper with a mass of 48.00kg is drawn into a wire with a diameter of 0.8440cm. The density of the copper is 8.960 grams per cm3.
Classify the following bonds as ionic, polar covalent, or covalent, and give your reasons: (a) the CC bond in H3CCH3, (b) the KI bond in KI, (c) the NB bond in H3NBCl3, (d) the CF bond in CF4.
Two scientists are experimenting with pure samples of isotope X, a highly radioactive substance. The first scientist has a sample with a mass of 20 grams.
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