Answer:
Sample B
Explanation:
When heat is added to a substance, the molecules and atoms vibrate faster. Since the speed for Sample B is higher this means it has a higher temperature as well.
Potassium is an element with a symbol of K. When it forms an oxide, it means that it has undergone combustion. The complete reaction for this is
K + O₂ ⇒ K₂O
This is a combination reaction which involves two reactants and one single product. It is important to note that the Law of Conservation of Mass mass be obeyed at all times. Technically, the law involved in balancing reactions is the Law of Definite Proportions. This is obeyed by making sure that the number of a specific element is the same before and after the reaction. So, the complete balanced reaction for this is
2 K + 1/2 O₂ ⇒ K₂O
The coefficient of O₂ in the reaction is 1/2.
Answer:
My best bet would be A) The stars to form
learned about this is in 7th grade
Explanation:
The infiltration of water into the soil.Example: Buildings ,pavement,concrete,compacted soil.
The oxidation state of Chromium chloride (III) is +3
How can we find the answer?
First of all write down what you know about the molecule:
1: The molecule hasn't got an electric charge (is not an ione), this means that either positive and negative charges of its atoms are balanced (we have the same number of positve and negative charges)
2: Since it's a salt, where the metal is chromium and the non metal is the alogen Chlorine, we know that the negative charge belogns to the non metal element because of its elettronegativity, therefore the positive charge belongs to the metale element (chromium).
3: when chlorin forms binary salts its oxidation state is always -1 (you can find out this info in a periodic table)
In <span>CrC<span>l3</span></span> we have 3 chlorine atoms where each of them carrys 1 negative charge, so the total amount of negative charges is -3
Since the charges are balanced, the question is: Which is the positive charge that Chromium must carry in order to balance 3 negative charges?
The answer comes out to +3