Answer:
25.2°C
Explanation:
Given parameters:
Energy applied to the water = 1000J
Mass of water = 50g
Final temperature = 30°C
Unknown:
Initial temperature = ?
Solution:
To solve this problem, we use the expression below:
H = m c Ф
H is the energy absorbed
m is the mass
c is the specific heat capacity
Ф is the change in temperature
1000 = 50 x 4.184 x (30 - initial temperature )
1000 = 209.2(30 - initial temperature)
4.78 = 30 - initial temperature
4.78 - 30 = - initial temperature
Initial temperature = 25.2°C
Answer:
So the answer to "every element and compound has a unique set of properties. True or False?" is TRUE
Explanation:
Answer:
The most common isotope is Bromine-79.
Explanation:
Answer:
- <em>The calculation of quantities is chemical equations is called </em><u><em>stoichiometry.</em></u>
Explanation:
In a chemical reaction, as a result of the law of conservation of mass, reactants combine in fixed proportions to form the products.
Then, a chemical reaction is characterized by cuantitative relations between the atoms and compounds, which permit to make predictions on how much product can be obtained from certain amounts of reactants or how much of each reactant you would need to obtain a desired amount of product.
<em>Stoichiometry</em> is the use of the mole coefficients of a chemical equation to state ratios and set proportions, and, so, determine the number of moles or masses of reactants and products.
It differs because it shows different volume of information and it gives a different point of indicanton of numbers.