<span>In a nuclear reaction, mass is converted to energy according to the famous relation E = mc^2
So the best answer is :
</span><span>C. During a chemical reaction, some of the mass of the reactants is converted to energy.</span>
the second statement is the correct one quarks are needed to balance charges in all subatomic particles such as neutrons, protons and electrons
The purpose of a switch in a series circuit is to make it easy to open or close the electrical circuit, turning the flow of electricity on or off. A light bulb in a series circuit is used to determine whether or not electricity is flowing.
Answer:
b.) 25 ml of aluminum hydroxide
Explanation:
For this question, we have to assume that we have the <u>same concentration</u> for all the solutions, for example, <u>1 M</u>. Additionally, we have to take into account the <u>ionization reaction</u> for each species:
a) <u>we have to ions</u>
b) <u>we have fourth ions</u>
c) <u>we have two ions</u>
d) <u>we have one ion</u>
If we have the same volume and the same concentration the variables that will help us to answer the question would be the n<u>umber of ions.</u> If we have <u>more ions we will have more particles dissolved</u>. Therefore the answer would be b) (<u>due to the fourth ions</u>).
I hope it helps
It's quite hard to explain without an example, but I'll give it a go:
Basically, you have to count the number of an element on one side of the equation, then count it on the other, and the aim of balancing the equation is to get the 2 values to be the same (as mass cannot be created or destroyed).
This involves multiplication of the molecule(s) on either side of the equation in order to balance the whole thing. Note this is not like maths, you dont have to do the same to both sides, but you <em>do</em> have to multiply out <em>entire molecules</em> - you cannot multiply just the H2 in H2O for example.
A reasonably basic example of this balancing is:
Fe + Cl2 = FeCl3
The first thing I notice is that there is an even number of Cl atoms on the left, and an odd number on the right, so the first thing I'll do is multiply the one on the right to get it to an even number, ie by 2.
Fe + Cl2 = 2(FeCl3)
Expanding that gives Fe2Cl6 (although you dont write it like that). So we need to get 6 Cl atoms and 2 Fe atoms by multiplying the left hand molecules by amounts if possible. If you look at that, we can achieve that, by multiplying Cl2 by 3, and Fe by 2.
2Fe + 3Cl2 = 2FeCl3
And there you have your balanced equation, you'll notice that the number of any given element has the same number of atoms on both sides of the equation.