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4 years ago

We can see because light is

1 answer:

8 0

Light is energy that travels in a ray which is a narrow beam of light. We can see things because light bounces off things and goes into our eyes. You can also see things that give off their own light.

Light comes from many different sources which is the place where something begins or comes from. The largest light source is the sun and without it, Earth would be cold and dark. Stars make light too. So do things like lightbulbs, candles, computers, and TVs.

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How many atoms are in 1 mole of hydrogen

Angelina_Jolie [31]

There are TWO atoms in one molecule of hydrogen.

8 0

3 years ago

The half-life of nitrogen-13 is 10.0 minutes. if you begin with 53.3 mg of this isotope, what mass remains after 25.9 minutes ha

zimovet [89]

Hello!

The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.

We have the following data:

mo (initial mass) = 53.3 mg

m (final mass after time T) = ? (in mg)

x (number of periods elapsed) = ?

P (Half-life) = 10.0 minutes

T (Elapsed time for sample reduction) = 25.9 minutes

Let's find the number of periods elapsed (x), let us see:

$T = x*P$

$25.9 = x*10.0$

$25.9 = 10.0\:x$

$10.0\:x = 25.9$

$x = \dfrac{25.9}{10.0}$

$\boxed{x = 2.59}$

Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:

$m = \dfrac{m_o}{2^x}$

$m = \dfrac{53.3}{2^{2.59}}$

$m \approx \dfrac{53.3}{6.021}$

$\boxed{\boxed{m \approx 8.85\:mg}}\end{array}}\qquad\checkmark$

I Hope this helps, greetings ... DexteR! =)

3 0

3 years ago

Which statement describes a system that consists of sugar crystals dissolving in water?

trapecia [35]

To know the answer, you either know what is really the nature and chemistry of a sugar solution. You can also know the answer by knowing the meaning of entropy. Entropy is often interpreted as the degree of disorder or randomness in the system. So the correct statement is that the system becomes more disordered and has an increase in entropy.

7 0

3 years ago

Read 2 more answers

What happens inside a can of spoiled food as gas is produced?

ddd [48]

Answer:D the pressure increases

Explanation:

6 0

3 years ago

How many moles of k3po4 can be formed when 4.4 moles of h3po4 react with 3.8 moles of koh

vazorg [7]

1.27moles of K3PO4 can be formed.