Answer:
He must set the ball in motion by applying force in the desired direction.
Explanation:
That is how the soccer player will change the ball's position.
Have a good day :)
Answer:
Dalton's atomic theory consisted of several postulates.
Explanation:
<span><span>
All matter consists of indivisible particles called atoms.
</span><span>
Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements.
</span><span>
Atoms cannot be created or destroyed.
</span><span>
Atoms of different elements may combine with each other in a fixed, simple, whole number ratio to form compound atoms.
</span><span>
Atoms of same element can combine in more than one ratio to form two or more compounds.
</span><span>
Atoms are the smallest unit of matter that can take part in a chemical reaction.
</span></span>
Answer:
<h2>0.5 moles</h2>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>0.5 moles</h3>
Hope this helps you
Usually it is the CuSO4 that is the limiting reagent.
<span>if all of the color of the solution was gone, but there was still some zinc metal mixed in with the copper metal produced, then Zn is the excess reagent </span>
<span>f all of the color of the solution was not gone, but there was no zinc metal left in with the blue copper solution , then Zn is the limiting reagent Hope this helps.</span>
Answer:
Average atomic mass = 17.5 amu.
Explanation:
Given data:
X-17 isotope = atomic mass17.2 amu, abundance:78.99%
X-18isotope = atomic mass 18.1 amu, abundance 10.00%
X-19isotope = atomic mass:19.1 amu, abundance: 11.01%
Average atomic mass of X = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (78.99×17.2)+(10.00×18.1) +(11.01+ 19.1) /100
Average atomic mass = 1358.628 + 181 +210.291 / 100
Average atomic mass = 1749.919 / 100
Average atomic mass = 17.5 amu.
