<span>299.2
The atomic weight of the new element is simply the weighted average of the isotopes. So
0.4030 * 296.78 + 0.5970 * 300.88
= 119.60234 + 179.62536
= 299.2277
Now the number of significant digits is the same as the number of significant digits of the LEAST PRECISE DATUM. And that would be the percentages at 4 significant digits each. So the result needs to be rounded to 4 significant digits which is 299.2</span>
F10=-2x-4 that’s the answer I’m pretty sure
Answer:
80
Step-by-step explanation:
180=(50+50)+x
180 = 100+x
x=80
The students will each receive 4 cookies, you divide 112 from 28 and it is 4.