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Andrej [43]
3 years ago
6

Elements in the first group of the periodic table are

Chemistry
1 answer:
Anna007 [38]3 years ago
6 0

Answer:alkali metals

Explanation:

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A sample of water is boiling as heat is added at a constant rate. Which statement describes the potential energy and the average
Elena L [17]
The statement which describes the potential and the kinetic energy of the water is this: THE POTENTIAL ENERGY INCREASES AND THE AVERAGE KINETIC ENERGY REMAINS THE SAME.
At boiling point of water, the heat that is been added to the water is used to break the chemical bonds that holds the molecules of the water together so that they can turn into vapour. At this point, the average kinetic energy of the water remains the same while the potential energy increases.
7 0
3 years ago
Food dye allergies have increased in recent years. One study calculated that each 47.9 g serving of M&M's candy contains 240
77julia77 [94]

Answer:

Mass percent of food dyes  = 0.0616%

Explanation:

Given data:

Mass of candy = 47.9 g

Calories = 240

Mass of fat = 10 g

Mass of carbohydrate = 34 g

Mass of protein = 2 g

Mass of food dyes = 29.5 mg

Mass percent of food dyes = ?

Solution:

First of all we will convert the mg into g.

Mass of food dyes = 29.5 mg × 1g /1000 mg = 0.0295 g

Mass percent of food dyes  = mass of food dyes / total mass× 100

Now we will put the values.

Mass percent of food dyes  = 0.0295 g / 47.9 g × 100

Mass percent of food dyes  =  0.000616 × 100

Mass percent of food dyes  = 0.0616%

3 0
4 years ago
Please help guys if you know it!
iogann1982 [59]
The second one is correct
4 0
3 years ago
Consider the reaction: AB As the reaction proceeds, the concentration of A drops from 0.625 M to 0.100 Min 11.6 seconds. What is
prisoha [69]

Answer:

0.045 M/s

Explanation:

Given:

Initial concentration of A = 0.625 M

Final concentration of A = 0.100 M

Total time taken for the change of concentration = 11.6 seconds

The average rate of reaction is calculated as:

= \frac{\textup{Change in concentration of A}}{\textup{Time taken for the change}}

on substituting the respective values, we get

= \frac{0.625-0.100}{\textup{11.6}}

or

The average rate of reaction = 0.045 M/s

3 0
3 years ago
Which of the following is true about the relationship between the energy gap (DE) between the spin states for a 1H nucleus and t
Alecsey [184]

Answer:

B

Explanation:

They are directly proportional. That's what the relationship states

3 0
3 years ago
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