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4 years ago

Explain whether sodium and potassium will react to form a bond with each other

Chemistry

1 answer:

NISA [10]4 years ago

4 0

They will react but only in a physical and chemical change.

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An isotope contains 16 protons 18 electrons and 16 neutrons. what is the identity of the isotope

jarptica [38.1K]

Answer:

Sulfur

Explanation:

You find the identity by looking at the number of protons. The number of protons never change for an element.

3 0

3 years ago

What is a physical change

kompoz [17]

It's changing a thing with force, not chemicals, like cutting paper

8 0

4 years ago

a sample of gas initially occupies 5.50 liter at a pressure of 0.750 atm at 13.0 C. what will the temperture change to 22.5 C an

sergey [27]

Answer:

The pressure will be 2.84 atm

Explanation:

The gas laws are a set of chemical and physical laws that allow us to determine the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature and moles.

Boyle's law indicates that the volume is inversely proportional to the pressure: if the pressure increases, the volume decreases and if the pressure decreases, the volume increases. Boyle's law is expressed mathematically as:

P * V = k

On the other hand, Charles's law indicates that with increasing temperature, the volume of the gas increases and with decreasing temperature, the volume of the gas decreases. That is, they are directly proportional. This is expressed mathematically as:

$\frac{V}{T} =k$

Finally, the Gay-Lussac law says that at constant volume, the pressure of the gas is directly proportional to its temperature. Mathematically, it is expressed as:

$\frac{P}{T} =k$

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

$\frac{P*V}{T}=k$

When you want to study two different states, an initial and a final one of a gas, you can use the following expression:

$\frac{P1*V1}{T1}=\frac{P2*V2}{T2}$

In this case:

P1= 0.750 atm
V1= 5.50 L
T1= 13 C= 286 K (being 0 C=273 K)
P2=?
V2= 1.50 L
T2= 22.5 C=295.5 K

Replacing:

$\frac{0.750 atm*5.50 L}{286 K}= \frac{P2*1.50 L}{295.5 K}$

Solving:

$P2=\frac{295.5K}{1.50L} *\frac{0.750 atm*5.50 L}{286 K}$

P2= 2.84 atm

The pressure will be 2.84 atm

8 0

4 years ago

In his transformation experiments, what did Griffith observe? Group of answer choices

masya89 [10]

Answer:

The correct answer is a. mixing a heat killed pathogenic strain of bacteria with a living non pathogenic strain can convert some of the living cells into the pathogenic form.

Explanation:

Griffith proved that DNA is the genetic material in some organism.To do this he described the process of transformation in which the heat killed pathogenic bacteria when mixed with a non pathogenic bacteria can convert the non pathogenic strain into pathogenic one. This principle is called transformation.

The transformation of non pathogenic strain into pathogenic one occur due to the uptake of DNA of the heat killed pathogenic bacteria by the non pathogenic strain.

4 0

4 years ago

Distinguish between matter and a substance

Irina18 [472]

Answer:

Matter is a physical substance that contains mass. A substance is a particular kind of matter with uniform chracteristics.

Explanation:

Remeber that matter is anything that has mass and takes up space :)

8 0

3 years ago