Answer:
<em>Matter exists in three basic states, which are solid, liquid, or gas. Of these, <u>a gas</u> contains the most thermal energy because in a gas the particles...</em>
<em>I </em><em>hope</em><em> this</em><em> </em><em>helps!</em>
Explanation:
The law of conservation of mass states that mass is conserved which also means that it cannot be created or destroyed within the isolated system.
We can add the mass of the reactant and can be equal to the mass of the product. But in some cases, it will not work like:
If reactants are not in the mole ratio, there will be a limiting reagent.
If a gas is one of reactants or products.
Radioactive decay and nuclear reactions(fission or fusion).
<span>2 * 22.4 = 44.8 liters (if using pre 1982 standard)
2 * 22.7 = 45.4 liters (if using 1982 and later standard)
First, let's determine how many moles of F2 we have.
Atomic weight fluorine = 18.998403
Molar mass F2 = 2 * 18.998403 = 37.996806 g/mol
Moles F2 = 76 g / 37.996806 g/mol = 2.000168119 mol
Now we have a minor problem. What definition of STP are you using?
Up until 1982,
STP was defined as 0°C and 1 atmosphere (101.325 kPa)
From 1982 and later,
STP was defined as 0°C and 100 kPa
Because of the difference in pressure between the two different definitions of STP, the molar volume of a gas is 22.414 liter/mol using the pre-1982 definition and 22.711 liter/mol using the 1982 and later definition. So you get to choose which of the following 2 answers.
2 * 22.4 = 44.8 liters (if using pre 1982 standard)
2 * 22.7 = 45.4 liters (if using 1982 and later standard)
Unfortunately there's still a large number of text books in use using the standard that should have been obsolete 35 years ago.</span>
The Heck reaction is a coupling reaction that combines an unsaturated halide with an alkene in the presence of base and palladium catalyst to provide a substituted alkene. It an important reaction as it forms a carbon-carbon bond and allows substitution on sp² hybridized carbons.
In this example, we have bromobenzene reacting with propene and are told that two constitutional isomers are formed. The expected product is the first one shown which has the benzene substitute onto the terminal end of the alkene. The isomer by-product that is formed is substitution onto the central carbon of the propene which leads to a product with a terminal alkene.