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Alenkasestr [34]
3 years ago
14

1. How do you determine how many protons are in a neutral element?

Chemistry
1 answer:
docker41 [41]3 years ago
6 0

Answer:

The number of protons in an atom is always equal to the atomic number.

Explanation:

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A sample has a pH of -0.248 (yes, it really is possible to have a negative pH). Find
dalvyx [7]

Answer:

pOH= 14.248

[H+]=1.77 M

[OH-]=5.65 x10^-15M

Explanation:

pH+pOH= 14

pOH= 14-pH

pOH=14-(-0.248)

pOH= 14.248

[H+]=10^-pH= 10^-(-0.248)=1.77 M

[OH-]=10^-pOH= 10^-14.248=5.65 x10^-15M

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3 years ago
Describe the change that you made that led to the decrease in the size of the greenleaf population. Explain why the change led t
slavikrds [6]

Answer:

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Explanation:

3 0
2 years ago
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Tony tuns on a fan on when his room becomes uncomfortably hot. The fan is an example of?
Lesechka [4]

Answer:

C-Electrical energy changed into mechanical energy

Explanation:

Energy, according to the law of conservation of energy, is said to neither be created or lost but only interchangeable from one form to another. Energy exists in different forms. The process by which one form of energy changes to another is called TRANSFORMATION of energy.

However, certain household appliances or devices bring about this transformation of energy. For example, in a case where Tony turns a fan on when his room becomes uncomfortably hot. The fan uses an electric source to get powered on, which then facilitates the blades of the fan to move fast in order to bring about a cool atmosphere.

The fan converts ELECTRICAL energy (electric source) into MECHANICAL energy (moving energy).

4 0
3 years ago
How does a sample of water at 38 °C compare to a sample of water at 295 K?
Sidana [21]

Converting the temperature, 295 K from Kelvin to Celsius scale:

295 K - 273 = 22^{0} C

Water has a boiling point of 100^{0}C and a melting point of 0^{0} C

When we compare water at two different temperatures, 22^{0}C and 38^{0}C we can say that water is in liquid form at both these temperatures as both of them are quite below the boiling temperature and above the melting temperature.

The temperature difference between water at the given two temperatures = 38^{0}C - 22^{0}C = 16^{0}C

Water at 38^{0}C is at a higher temperature and so is warmer than water at a lower temperature of 22^{0}C (or 295 K).


7 0
3 years ago
Modern atomic theory is built on _____ including Daltons atomic theory and quantum mechanics
Olin [163]

Answer: D- previous models

Explanation:

Because you always have to build off of other things to help make yours better and learn from the mistakes

5 0
3 years ago
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