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2 years ago

5

Which is a characteristic of nuclear fission?

1 answer:

FinnZ [79.3K]2 years ago

4 0

A nucleus spontaneously splits and absorbs energy.

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Why does landforms change occurred

kherson [118]

Erosion etc. if it's specific then rain and weathering maybe

5 0

4 years ago

what type of element can turn into both solid and liquid form depending on the temperature of its surroundings ?

lorasvet [3.4K]

<em>Answer:</em>

<em>An Atom can turn into both solid and liquid form depending on the temperature of its surroundings </em>

<em>Explanation:</em>

<em>Scientists have discovered a new state of physical matter in which atoms can exist as both solid and liquid simultaneously. Researchers have found, however, that some elements can, when subjected to extreme conditions, take on the properties of both solid and liquid states.</em>

7 0

3 years ago

Read 2 more answers

Calculate the volume, in liters, occupied by 1.80 moles of H2 gas at STP.

masha68 [24]

Answer:

40.32L

Explanation:

So we know that 22.4 Liters is one mole of a gass so we can set up an equation to test that

1mole 1.8mole

_____ = _____

22.4L x

and then cross multiply so you get 40.32L

3 0

3 years ago

Read 2 more answers

When heat is applied to 80 grams of CaCO3, it yields 39 grams of B. Determine the percentage of the yield.

EleoNora [17]

The question is incomplete, the complete question is:

When heat is applied to 80 grams of CaCO3, it yields 39 grams of CaO Determine the percentage of the yield.

CaCO3→CaO + CO2

<u>Answer:</u> The % yield of the product is 87.05 %

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

We are given:

Given mass of $CaCO_3$ = 80 g

Molar mass of $CaCO_3$ = 100 g/mol

Putting values in equation 1, we get:

$\text{Moles of }CaCO_3=\frac{80g}{100g/mol}=0.8mol$

For the given chemical reaction:

$CaCO_3\rightarrow CaO+CO_2$

By stoichiometry of the reaction:

If 1 mole of $CaCO_3$ produces 1 mole of CaO

So, 0.8 moles of $CaCO_3$ will produce = $\frac{1}{1}\times 0.8=0.8mol$ of CaO

We know, molar mass of $CaO$ = 56 g/mol

Putting values in above equation, we get:

$\text{Mass of CaO}=(0.8mol\times 56g/mol)=44.8g$

The percent yield of a reaction is calculated by using an equation:

$\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100$ ......(2)

Given values:

Actual value of the product = 39 g

Theoretical value of the product = 44.8 g

Plugging values in equation 2:

$\% \text{yield}=\frac{39 g}{44.8g}\times 100\\\\\% \text{yield}=87.05\%$

Hence, the % yield of the product is 87.05 %

6 0

3 years ago

When one of the atoms involved in a covalent bond has a much higher electronegativity than the other atom, what type of bond res

ICE Princess25 [194]

If electronegativity difference between atoms is much higher then they form ionic bond.

Hope this helps!

5 0

4 years ago