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NARA [144]
3 years ago
5

A diver is 15 feet below sea level. A scientist on a boat is 12 feet above sea level. Who is farthest from sea level.

Chemistry
1 answer:
maw [93]3 years ago
7 0
The diver because distance is measured in absolute value so no matter if the value is suppose to be negative distance will always be measured as absolute value. In this case the biggest number is the farthest away.
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What is a temperature scale used by scienctist?
laila [671]
To measure the kinetic engery  from the inside and outside of something to be able to tell how hot or coll something is.. without touching it also
3 0
4 years ago
Vanillin (used to flavor vanilla ice cream and other foods) is the substance whose aroma the human nose detects in the smallest
balu736 [363]

Answer:

Cost to supply enough vanillin is 3.2\$

Explanation:

Threshold limit of vanillin in air is 2.0\times 10^{-11}g per litre means there should be 2.0\times 10^{-11}g of vanillin in 1L of air to detect aroma of vanillin.

1ft^{3}=28.32L

So, 5.0\times 10^{7}ft^{3}=(5.0\times 10^{7}\times 28.32)L

So amount of vanillin should be present to detect = (2.0\times 10^{-11}\times 5.0\times 10^{7}\times 28.32)g

As cost of 50 g vanillin is 112\$ therefore cost of  (2.0\times 10^{-11}\times 5.0\times 10^{7}\times 28.32)gvanillin = (2.0\times 10^{-11}\times 5.0\times 10^{7}\times 28.32\times 112)\$ = 3.2\$

5 0
3 years ago
?<br> Which of the following correctly describes an acidic solution at 25°C?
makvit [3.9K]

Answer: [H3O+] > [OH-] and Kw = 1 x 10 -14

Explanation:

i just had this question and tried to look it up and i got it right by guessing my bad but i hope this is ur answer as well

4 0
3 years ago
How do I do question number 3? And what is the answer?
shutvik [7]

Answer:

60.02 g.

Explanation:

  • It is clear from the balanced equation:

<em>Mg + 2HCl → MgCl₂ + H₂. </em>

that 1.0  mole of Mg reacts with 2.0 moles of HCl to produce 1.0 mole of MgCl₂ and 1.0 moles of H₂.

  • 20.0 g of Mg reacts with excess HCl. To calculate the no. of grams of HCl that reacted, we should calculate the no. of moles of Mg:

<em>no. of moles of Mg = mass/atomic mass</em> = (20.0 g)/(24.3 g/mol) = 0.823 mol.

  • From the balanced equation; every 1.0 mol of Mg reacts with 2 moles of HCl.

∴ 0.833 mol of Mg will react with (2 x 0.833 mol = 1.646 mol) of HCl.

<em>∴ The mass of reacted HCl = no. of moles x molar mass</em> = (1.646 mol)(36.46 g/mol) = <em>60.02 g.</em>

3 0
4 years ago
Complete the sentence. When a base is added to water, hydrogen ions __________.
kobusy [5.1K]

Answer:

Explanation:

Decreases

7 0
2 years ago
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