Answer:
It is Ca2+
Explanation:
Answer:
A balanced chemical equation not only describes some of the chemical properties of substances—by showing us what substances react with what other substances to make what products—but also shows numerical relationships between the reactants and the products.
2.specific Heat
3.thermal equilibrium
4.Heat of Fusion
Answer: Option (3) is the correct answer.
Explanation:
When two substances or objects at the same temperature do not exchange heat with each other then this state is known as thermal equilibrium.
Whereas latent heat is the release or absorption of energy at a constant temperature.
Specific heat is the amount of heat per unit mass necessary to increase the temperature by one degree Celsius.
Heat of fusion is the amount of energy required to change the state of matter or substance.
Thus, we can conclude that out of the given options, thermal equilibrium describes the point when two objects reach the same temperature and there is no longer a transfer of energy through heat.
The answer to the riddle Maggie is solving is 6
To determine the answer to the riddle Maggie is solving,
We will subtract the number of valence electrons in halogens by the number of valence electrons in alkali metals.
First, let us define what is meant by valence electrons
Valence electrons are those electrons that reside in the outermost shell surrounding an atomic nucleus.
Now, we will the determine the respective number of valence electrons in halogens as well as the number of valence electrons in alkali metals.
For Halogens
Halogens are the group 17 (group 7A) elements in the periodic table. Examples are Fluorine, Chlorine, Bromine etc.
Halogens have 7 electrons in their outermost shell
For Alkali metals
Alkali metals are the group 1 metals. Examples are Lithium, Sodium, Potassium etc.
Alkali metals have 1 electron in their outermost shell
Now, for the answer to the riddle,
Answer to the riddle = Number of valence electrons in halogens - Number of valence electrons in Alkali metals
\
Answer to the riddle = 7 - 1
∴ Answer to the riddle = 6
Hence, the answer to the riddle Maggie is solving is 6
Learn more here: brainly.com/question/9392364
Answer:
The answer to your question is 2.84 M
Explanation:
Data
mass of MgO = 57.3 g
volume of the solution = 500 ml
Process
1.- Calculate the molar mass of MgO
MgO = 24.3 + 16 = 40.3 g
2.- Calculate the moles of MgO
40.3 g MgO ----------------- 1 mol
57.3 g MgO ----------------- x
x = (57.3 x 1) / 40.3
x = 1.42 moles
3.- Calculate the Molarity
Molarity = moles / volume (l)
Volume = 0.5 liters
-Substitution
Molarity = 1.42 / 0.5
-Result
Molarity = 2.84
The molarity of the solution is 2.84 M.
To find the molarity of the solution, we need to first calculate the number of moles of MgO and the volume of the solution.
First, we convert the mass of MgO to moles using its molar mass. The molar mass of MgO is 40.31 g/mol, so:
moles of MgO = mass of MgO / molar mass of MgO
moles of MgO = 57.3 g / 40.31 g/mol = 1.42 mol
Next, we convert the volume of the solution to liters:
volume of solution = 500.0 mL / 1000 mL/L = 0.500 L
Finally, we divide the number of moles of MgO by the volume of the solution to find the molarity:
molarity = moles of solute / volume of solution
molarity = 1.42 mol / 0.500 L = 2.84 M
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