Answer:
Temperature will revert to room temperature after the substance reacts fully. Heat energy flows between the chemical bonds of the added substance and water to the surroundings (elsewhere in the water, the beaker, a student's hand that touches the beaker).
Explanation:
Answer:
0.0400 g for the example given below.
Explanation:
pH value is not provided, so we'll solve this problem in a general case and then we will use an example to justify it.
- By definition, .
- NaOH is a strong base, as it's a hydroxide formed with a group 1A metal, so it dissociates fully in water by the equation: .
- From the equation above, using stoichiometry we can tell that the molarity of hydroxide is equal to the molarity of NaOH: .
- Concentration of hydroxide is then equal to the ratio of moles of NaOH and the volume of the given solution. Moles themselves are equal to mass over molar mass, so we obtain: .
- We also know that . Take the antilog of both sides: .
- Solve for the mass of NaOH: .
Now, let's say that pH is given as 12.00 and we use a 100-ml volumetric flask. Then we would obtain:
1.7 km^2 already has two significant figures.
An engineer's solution to a problem would involve designing shatter-resistant windows for a car.
<h3>Who is an engineer?</h3>
An engineer is a person who applies the knowledge of science to design tools and equipment which are used to solve the problems facing man.
An engineer specializes in the scientific field of engineering.
Some tools or devices produced by engineers are machines and vehicles such as cars and aeroplanes.
Therefore, an engineer's solution to a problem would involve designing shatter-resistant windows for a car.
Learn more about engineering at: brainly.com/question/17169621
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