1. Why do scientists use a standard measurement system?
2 answers:
Answer:
Explanation:
1.Scientists use a shared system for reporting measurements called the International System of Units (SI). We use common measurement systems because science involves a lot of replication to confirm results. The most common system used in science is the metric system.
2.m, kg, m^3
3. g value change
Answer:
3 is value change
Explanation:
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Using the law of dilution :Vi = 7.5 mL
Answer:
a I guess
Explanation:
<em>Answer: </em>
The option C is correct. CH4N, 90g, C3H12N3. <em>Explanation: </em>
<em>Option C: </em>
The molecular formula is C3H12N3. If we take ratio 3:12:3 that will be equal to 1:4:1 so its empirical formula will be CH4N. The molar mass of molecular formula = (12×3) + (1×12) +( 14×3) = 98 g <em>Option A : </em>
In option A , molecular and empirical formula are both correct but molar mass is not valid. It should be 169 acc. to molecular formula. <em>Option B: </em>
In option B, molecular formual is not valid. It should be as C6H16O2
