How many valence electrons does strontium (Sr) have?
1 answer:
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Answer:
15 mol Mg
Explanation:
Step 1: Find conversions
Avagadro's Number: 6.022 × 10²³
Step 2: Use Dimensional Analysis
= 14.6179 mol Mg
Step 3: Simplify
We have 2 sig figs.
14.6179 mol Mg ≈ 15 mol Mg
Given
Speed = 5.9 miles / hour
1 mile = 1.609 km
1 hour = 60 min
Time given = 98 min
Convert miles to km, hours to min and calculate the distance for 98 min:
pic added above
Please cooperate with answer as am a new to brainly so I don't know much about it.
Thank you.
