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3 years ago

5

What units could you use to describe the mass of a tablespoon

1 answer:

castortr0y [4]3 years ago

4 0

I believes you would use grams to describe the mass of a tablespoon an you should report that guy

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How does the greenhouse effect relate to the theme of stability and change

Nadya [2.5K]

The greenhouse effect increases the temperature of the Earth by trapping heat in our atmosphere. This keeps the temperature of the Earth higher than it would be if direct heating by the Sun was the only source of warming.
When the sunlight reaches the surface of the Earth, some of it is absorbed which warms the ground and some bounces back to space as heat. Greenhouse gases that are in the atmosphere absorb and then redirect some of this heat back towards the Earth.

8 0

3 years ago

One mole of Ca is equal to how many atoms

Irina18 [472]

Answer:

1 mole of calcium contains 6.023 $\times$ $10^{23}$ atoms.

Explanation:

1 mole is the amount of a substance that contains exactly $6.023\times 10^{23}$ constituent particles. 1 mole of a substance is always equal to the atomic mass of the element.

Hence, 1 mole of calcium will also have $6.023\times 10^{23}$ atoms.

Number of atoms in 1 mole calcium = 6.023 $\times$ $10^{23}$ atom

4 0

4 years ago

What is the mass number of a fluorine atom with 8 neutrons?

Karolina [17]

Answer:

17

Explanation:

since the no. of protons=9

therefore mass no.= 9+8=17

8 0

3 years ago

schepotkina [342]

The remaining 90% transforms into Hydrogen and Oxygen. The remaining 90% is recombined to maker larger molecules. I think

6 0

3 years ago

If the half life of a radioactive isotope is 1 day, then how much of the original isotope remains at the end of two days?

ikadub [295]

$\huge{\color{magenta}{\fcolorbox{magenta}{black}{\huge{\color{white}{\fcolorbox{aqua}{black}{✿ᴀɴsᴡᴇʀ✿}}}}}}$

25%

Explanation:

In a half life of a radioactive isotope is 1 day,it means it loses its half mass each day

We a formula for N half life

$\sf { \frac{1}{2} }^{n}$

where n is the number of days

Here the isotope is kept for 2 days

so it's left over mass will be

$\sf { (\frac{1}{2}) }^{2} \\ \\ \\ \frac{1}{2} \times \frac{1}{2} \\ \\ \sf \frac{1}{4}$

It's left over mass 1/4th of the original mass

Now, we need to find it's percentage by multiplying with 100

$\sf \frac{1}{4} \times 100 \%\\ \\ \sf \cancel\frac{100}{4} \% \\ \\ \sf 25\%$

<u>So</u><u> </u><u>2</u><u>5</u><u>%</u><u> </u><u>mass</u><u> </u><u>will</u><u> </u><u>be</u><u> </u><u>left</u><u> </u><u>after</u><u> </u><u>2</u><u> </u><u>day</u><u> </u><u>of</u><u> </u><u>half</u><u> </u><u>life</u><u> </u><u>radioactive</u><u> </u><u>isotope</u><u>.</u><u> </u>

8 0

2 years ago

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