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Akimi4 [234]
3 years ago
13

why does every human measurement have uncertainty associated with it? Why must we manage the uncertainty during calculations?

Chemistry
1 answer:
dimulka [17.4K]3 years ago
3 0
Because there are many numbers of the human measurement . we must manage the uncertainly doing calculations because we can know what we are calculating.
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8 0
2 years ago
How do you Convert 19mL to pL?
s2008m [1.1K]

Picoliter is a unit of measurement for liquids.

One picoliter = 1×10⁻⁹ mililiters

So:

19 mL ---- x pL

1×10⁻⁹ mL ---- 1 pL

1×10⁻⁹x = 19

x = 1,9 × 10¹⁰ pL

or 19,000,000,000 pL

Answer: 1.9 × 10¹⁰ pL

7 0
1 year ago
When 1.0 mole of MgSO4 is dissolved in water contained in a calorimeter, the temperature of the water and dissolved ions increas
KatRina [158]

Answer: negative , from , to , exothermic

Explanation:

An endothermic reaction is a type of chemical reaction in which energy is absorbed from the surrounding. The temperature of the surrounding decreases.

An Exothermic reaction is a type of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.

Endothermic reactions are those in which heat is absorbed by the system from the surroundings and exothermic reactions are those in which heat is released by the system to the surroundings. \Delta H  for Endothermic reaction is positive and  

As on dissolution of salt, the temperature of water increases, the heat has been released from system into surroundings and thus \Delta H is negative.

4 0
3 years ago
Would Nitrogen Dioxide be ionic or covalent
tatiyna

Explanation:

The nitrogen dioxide is a covalent compound where one nitrogen is the central atom which is bonded to two oxygen atoms, where one oxygen atom is bonded by a single bond and other oxygen atom by a double bond.

4 0
3 years ago
Read 2 more answers
Substances that are less dense than water will_____ and substances with a density that is greater than 1.00 g/ml will____
Stells [14]
Substances that are less dense than water will FLOAT and substances with a density that is greater than 1.00g/ml will SINK.
7 0
3 years ago
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