Answer: "The reactants are higher in energy than the products"
Explanation:
The exothermic reactions are characterized by the release of heat to the surroundings. The reactants lose heat that is delivered to the surroundings which implies that the products will be lower in energy than the reactants.
The hills that you can see in a reaction energy diagram are not related with the final change of energy. The hills are an indication of the activation energy needed to start the reaction, but they do not measure the change of energy from the products to the reactants.
The enthalpy that is a state variable that identifies the content of heat. Then the change of enthalpy for the exothermic reactions is negative, meaning that the energy of the products is lower than the energy of the reactants.
1 Ounce = 28.3495231 Grams
<span>1 Troy Ounce = 31.1034768 Grams</span>
Jot down the formula of the ionic compound. Let's say the ionic compound you're working with is NaCl. ...
Write the name of the metal. ...
Add the name of the non-metal with an –ide ending. ...
Combine the cation and anion names. ...
Practice naming more simple ionic compounds.
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Answer: B. you will need 53.2 g Cl2 for complete reaction and will produce 66.7 g of AlCl3.
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
To calculate the moles, we use the equation:
The balanced reaction is:
2 moles of aluminium react with= 3 moles of chlorine
Thus 0.5 moles of aluminium react with=
moles of chlorine
Mass of chlorine=![moles\times {\text{Molar Mass}}=0.75\times 71=53.2g](https://tex.z-dn.net/?f=moles%5Ctimes%20%7B%5Ctext%7BMolar%20Mass%7D%7D%3D0.75%5Ctimes%2071%3D53.2g)
2 moles of aluminium produce = 2 moles of aluminium chloride
Thus 0.5 moles of aluminium react with=
moles of aluminium chloride
Mass of aluminium chloride=![moles\times {\text{Molar Mass}}=0.5\times 133.34=66.7g](https://tex.z-dn.net/?f=moles%5Ctimes%20%7B%5Ctext%7BMolar%20Mass%7D%7D%3D0.5%5Ctimes%20133.34%3D66.7g)
Thus 53.2 g of chlorine is used and 66.7 g of aluminium chloride is produced.
There are 6 molecules of Mg3(PO4)2
6 × 3 = 18 Mg
6 × 4 × 2 = 48 O