Ineed chemistry ! how would i set up these problems?

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1) 8.33 minutes

2) 118.39 in/ s

180.43 m/min

10.83 km/ hr

Explanation: -

Speed of light = 3 x 10⁸ m/s

Distance of the earth from the sun= 93 million miles

We know 1 million = 1,000,000

Also 1 mile = 1609 m

Distance of the earth from the sun= 93 million miles

= 93,000,000 miles.

= 1.5 x m

Time taken =

= m}{3 x 10⁸ m/s} " alt=" 10^{11}" /> m}{3 x 10⁸ m/s} " />

= 500 s

= 500/ 60

= 8.33 minutes

2) Distance = 1 mile = 63360 inches

Time taken = 8.92 min

= 8.92 x 60

= 535.2 s

Speed =

=

= 118.39 in/ s

Distance = 1 mile = 63360 inches = 63360 x 2.54 cm = 63360 x 2.54 x m

Time taken = 8.92 min

Speed =

= m}{8.92 min} " alt=" 10^{-2}" /> m}{8.92 min} " />

= 180.43 m/ min

1 m = 10⁻³ Km

1 min = 1/60 hour

1 m /min = 10⁻³ km/

= 60/1000

=0.06 km/hr

180.43 m / min = 180 x 0.06 km / hr

= 10.93 km / hr

i do not know

explanation:

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.