Answer:
The correct answer is A
Explanation:
That water stops moving once it gets to the dam and turns into potential energy
After 100years, sample is 250g
After 200 years, sample is 125g
After 300years, sample is 62.5 g
<span><span>4.2×1022</span>NA</span><span> N_{A} is the avagadro number</span>
Answer:The first method to determine the chemical composition of a substance in space was using light. By determining red shift in the observed spectrum of light they could determine the elements they were observing
Explanation:
Answer:
<h3>The answer is 123.72 g</h3>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume = 157 mL
density = 0.788 g/mL
We have
mass = 0.788 × 157 = 123.716
We have the final answer as
<h3>123.72 g</h3>
Hope this helps you
