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1. Give an example of a chemical change.
2. Give an example of a homogeneous mixture.
3. Give an example of a heterogeneous mixture.
4. Give an example of a physical change.
Sodium bicarbonate decomposes to form the final solid product sodium oxide. Using a balanced equation, you are to convert the grams of sodium bicarbonate, one number is 5.213, to moles.
Patiens suffering from repiratory disorders are often treared in oxygen tents in which the atmosphere is enriched in oxygen. What is the partial pressure of O2 in an oxygen tent consisting of 45% O2 for an atmospheric pressure of 753 mmHg?
element x crystallizes in a body-centered cubic lattice. its atomic mass is 59 amu. the edge length of a unit cell of x
Explain the can contains fewer molecules than an identical can of hydrogen gas at the same temperature and pressure for the reason that the hair spray molecules and propellant molecules are larger than hydrogen molecules.
calculate the energy change for the reaction given the following ionization ie energy and electron ea affinity values.
25 g of a certain metal is heated in boiling water and then poured into 90 mL of water initially at 22.0oC. After the water has resumed a constant temperature.
Question- Propane, c2h8, and n-octane, c8h18, are important components of the widely used fossil fuels. The enthalpy change for the combustion of 1 mole propane is -2219 kj and that for 1 mol octane is -5466kj. Calculate the enthalpy change per gr..
How does ease of oxidation correlate with activity? Do highly active metals tend to donate electrons or accept electrons from other metals?
Problem- Aldehydes and ketones can be reduced to alchohols using hydrogen gas and a metal catalyst. Suggest two reasons why the use of sodium borohydride is preferred over the catalytic hydrogenation in order to prepare diphenylmethanol from benzo..
A particular first-order reaction has a rate constant of 1.35 × 10^2 s-1 at 25°C. What is the magnitude of k at 75°C if Ea = 85.6 kJ/mol?
How is it possible for temperatures below the ice to be actually warmer than surface temperatures
When 45.0 g of Mg(OH)2 reacts with 45.0 g of HCl according to the equation below, Mg(OH)2 produces 0.772 mol of MgCl2 and HCl produces produces 0.616 mol of MgCl2. What compound is the limiting reagent?
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