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Anon25 [30]
3 years ago
8

A substance that releases hydrogen ions in water is a base. True or false?

Biology
2 answers:
Nataliya [291]3 years ago
8 0
No it is false. Because any substance is base what include OH. If it releases H ion, it should be acid.
VikaD [51]3 years ago
5 0

Answer: FALSE

Explanation:

An acid is a substance which donates H⁺ (hydrogen) ions when are added to water or any other solution. The amount of H⁺ions liberates per acid molecule defines the acidity of the acid like weak or strong. The base is a substance which donates OH⁻ ions (hydroxide ions ) in the solution or water.        

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A quantity of a gas has an absolute pressure of 400 kPa and an absolute temperature of 110 degrees kelvin. When the temperature
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Answer:  The new pressure of the gas is (A) 854.46 kPa.

The pressure of a given mass of gas at the absolute temperature 110 degrees K is 400 kPa.

The temperature is raised to 235 degrees K  with constant volume.

Therefore,

Initial pressure P_{1}=400kPa

Initial temperature T_{1}=110K

Final temperature T_{2}=235K

Final pressureP_{2}=?

According to pressure law of gas,

\frac{P_{1} }{T_{1} }=\frac{P_{2} }{T_{2} }     ( at constant volume)P_{2}=\frac{P_{1}T_{2} }{T_{1} }

P_{2}=\frac{400X235}{110}

P_{2}=854.46kPa

Thus, the required new pressure of the gas is 854.46 kPa.

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3 years ago
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3 years ago
Which change of state occurs at 0 °C when heat energy has been added to ice?
Ksivusya [100]

I think the answer is B

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Which of the following correctly compares the benefits of two forms of renewable energy?
Lelu [443]
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24. Name two types of pathways that help a body maintain homeostasis, and an example of each.
gavmur [86]

Answer:

See the answer below

Explanation:

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Negative feedback returns body processes back to normal after the process has been breached. An example is when the body temperature becomes too high or too low. At too high temperature, vasodilation of the skin's blood vessels occurs and more heat is lost to the surrounding from the skin, sweat is also produced by sweat glands and evaporation of the seat causes cooling. At too low temperature, vasoconstriction occurs leading to the conservation of more heat. The muscles also shake to generate more body heat

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