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3 years ago

11

You pack sandwiches for a mountain hike with your friends. Each sandwich takes 2 slices of bread and each hiker eats one sandwic

h. How many slices of bread are used for m hikers?

1 answer:

Vadim26 [7]3 years ago

4 0

Answer:

2m

Step-by-step explanation:

(2 slices/sandwich) × (1 sandwich/hiker) × (m hikers) = 2m slices

_____

"Unit analysis" can be helpful keeping the numbers straight.

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The approximate molar concentration of several chemicals are given. Find the pH of each use the calculator and round to the near

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Answer:

$pH = 13$ --- Oven Cleaner

$pH = 6.2$ --- Water

$pH =7.4$ --- Blood

$pH = 2.2$ --- Vinegar

Step-by-step explanation:

The given molar concentration are:[Missing from the question]

Oven Cleaner: [h+] = $10^{-13}$

Water: [h+] = $0.0000007$

Blood: [h+] = $0.00000004$

Vinegar: [h+] = $0.0063$

Required

Determine the pH

pH is calculated using:

$pH = -\log(h+)$

So, we have:

Oven Cleaner:

$pH = -\log(10^{-13})$

Using a calculator, we have:

$pH = 13$

Water:

$pH = -\log(0.0000007)$

Using a calculator, we have:

$pH = -1*-6.2$

$pH = 6.2$

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$pH = -\log(0.00000004)$

Using a calculator, we have:

$pH = -1 * -7.4$

$pH =7.4$

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$pH = -\log(0.0063 )$

Using a calculator, we have:

$pH = -1 * -2.2$

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Answer:3.25 gallons

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Every 24 miles equals 1 gallon

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