<h2 /><h3>Which of these is an agent of chemical weathering?</h3>
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<em>Answer</em><em>;</em><em> </em><em> </em><em> </em><em>The primary agents in chemical weathering are water, oxygen and acids. Explanation: These react with surface rocks to form new minerals that are stable in,or in equibrilium with the physical and chemical conditions present on the earth's surface</em></h3>
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<em>Hope</em><em> </em><em>it's</em><em> </em><em>helpful</em><em> </em><em>to</em><em> </em><em>you</em><em> </em><em>please</em><em> </em><em>rate</em><em> </em><em>me</em><em> </em><em>and</em><em> </em><em>like</em><em> </em><em>my</em><em> </em><em>answer</em><em>.</em><em>,</em><em>.</em><em>.</em><em>.</em></h3>
Answer:
A.
4Fe + 3O2 2Fe2O3 .........................
I am going to take a guess C
Sorry this isn’t an answer but do all schools take a star test?
At first situation, ratio = x/y = 1/5
5x = y -------Equation (i)
Now, after adding 5 more red, it is = x + 5 / y+5 = 1/3
y+5 = 3(x + 5)
y + 5 = 3x + 15
y - 3x = 15 - 5
Substitute the value of y from equation (1),
5x - 3x = 15 - 5
2x = 10
x = 10/2
x = 5
Originally, There were 5 red marbles in the bag
Hope this helps!
