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CaHeK987 [17]
3 years ago
11

When Jacob is running, his heart beats 23 times in 10 seconds. What is Jacob's heart rate in beats per minute (bpm) while runnin

g?
135 bpm
136 bpm
137 bpm
138 bpm
Biology
2 answers:
Alika [10]3 years ago
6 0
138 bpm 2.3 x 60 is 138
Maru [420]3 years ago
3 0

Answer:

138 bpm

Explanation:

A minute has 60 seconds. You have 23 beats in 10 seconds. You could do a simple multiplication by 6 to get to the 60 seconds you need or you could say:

23 beats .......... 10 seconds

x beats .......... 60 seconds

x=\frac{23 * 60}{10}

x = 138 bpm

I think you got the point. Desires time is 6 times larger, so is the number of beats.

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Answer:

                     (i) 1 moles of C

                     (ii) 4.5 moles of C

Explanation:

                   The Chemical equation is as follow,

                                             A + 2 B  →  C

This chemical equation can be translated as;

(i) 1 mole of A reacts with 2 moles of B

(ii) 1 mole of A produces 1 mole of C

(iii) 2 moles of B reacts with 1 mole of A

(iv) 2 moles of B produces 1 mole of C

(v) 1 mole of C is produced by 1 mole of A and 2 moles of B

Therefore to find the number of moles of C produced by 2 mole of B we will do following proportional method.

As,

                        2 moles of B produced  =  1 mole of C

So,

                    2 moles of B will produce  =  X moles of C

Solving for X,

                      X =  2 moles × 1 mole / 2 moles

                      X =  1 moles of C

Note:

         In above problem the given moles were the same as that present in balance equation so incase if the moles are different from that of the equation then the method shown above can be used to solve it.

Lets try it for 9 moles of B:

As,

                        2 moles of B produced  =  1 mole of C

So,

                    9 moles of B will produce  =  X moles of C

Solving for X,

                      X =  9 moles × 1 mole / 2 moles

                      X =  4.5 moles of C

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3 years ago
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