Answer:
20 km/h
Explanation:
Your total displacement is 40 km (40km west - 20km east).
Your time is given as 2 hours
40km/2h = 20 km/h
Using the atomic weights, K = 39, O=16 so KO2= 39+32=71. So K=39/71= 0.549 of KO2 and O2=32=0.45KO2 and O2=8g and 0.45KO2=8g so KO2=8/0.45=17.77g. So to check, K=0.549 x 17.77g=9.76 and so K+O2= 9.76+8g=17.76.
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Answer:Answer: Mendeleev's table of elements was better accepted than those of other scientists at the time because it predicted correctly the properties of elements that had not yet been discovered. Moseley went a step further in suggesting that the elements be arranged according to atomic number
Explanation:
Answer:
whats the question??? I am familiar with brainpop but if u tell me the question ill give u the asnwer
Explanation:
