Answer:
25
Explanation:
Step 1: Given data
Circumference of the running track (c): 400 m
Total distance completed during the race (d): 10 km
Step 2: Convert "d" to meters
We will use the conversion factor 1 km = 10³ m.
10 km × (10³ m/1 km) = 10⁴ m
Step 3: Calculate the number of laps to be completed (n)
We will use the following expression.
n = d/c
n = 10⁴ m/400 m
n = 25
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Answer:
Mg3N2
Explanation:
it would be magnesium as it would loss to electron so it would have 10 electron. you can see in the picture above .
hope this helps :)
Answer:
Explanation:
Cesium Lewis dot structure would look like this:
·Cs, because it only has one valence electron. But, since it has a plus, that means we lost an electron. So, we have to get rid of the dot and you have:
Answer:
The molar mass of carbon
Explanation:
Before the mass (in grams) of two moles of carbon can be determined, <u>the molar mass of the element would be needed.</u>
<em>This is because the number of mole of an element is the ratio of its mass and the molar mass</em>. That is,
number of mole = mass/molar mass
Hence, the mass of elements can be obtained by making it the subject of the formular;
mass = number of mole x molar mass
<em>Therefore, the molar mass of carbon would be needed before the mass of 2 moles of the element can be determined.</em>
