Are there chemical reactions happening in our home

1 answer:

4 0

Yes, remember a chemical reaction is whenever one or more substances combine together to form a different substance. So whatever you put together and form something new is called a chemical change/reaction. Examples such as rusting of Iron, expired milk(going sour), Baking cake and many more to think about
Hope it helps

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An electromagnetic wave that has a higher frequency than ultraviolet light will have ____ than the ultraviolet light.

8_murik_8 [283]

C)shorter wavelength and higher energy
frequency is inversely proportional to wavelength
frequency is directly proportional to Energy

5 0

3 years ago

Why is it that you might feel the effect of gravitational forces between you and Earth, but not between you and a classmate?

MakcuM [25]

Answer:

Because the mass of the the earth is way bigger than the mass of a classmate

Explanation:

Formula for force of gravity is;

F = Gm1•m2/r²

Where m1 and m2 are the two objects masses in question.

So, m1 may be your mass while m2 may be either the mass of the earth or your classmate.

The bigger the mass of m2, the more the force of gravity

Mass of the earth is about 5.97 × 10^(24) kg is which is so much more bigger than that of the classmate which is a human being.

Therefore, the reason why you may feel the effect of the gravitational forces between you and Earth, but not between you and a classmate is probably because the mass of the the earth is way bigger than the mass of a classmate

4 0

3 years ago

A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L

NeTakaya

Answer:

$\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}$

Explanation:

In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:

$P_1V_1=P_2V_2$

Now we can substitute any known values into the formula.

Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.

$25.0 \ L * 2.05 \ atm = P_2V_2$

The volume is decreased to 14.5 liters, but the pressure is unknown.

$25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L$

Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .

$\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}$