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allsm [11]
3 years ago
8

Using the video controls, compare the wave shapes of a mosquito's buzz with the wave shape of the air boat's roar. How are the s

hapes different?
*****PLATO QUESTION*****
Chemistry
2 answers:
Illusion [34]3 years ago
7 0

Answer:

The height of the waves vary. The wave height is much larger for the air boat than for the mosquito.

Explanation:

Plato question

denis-greek [22]3 years ago
6 0

Answer:The height of the waves vary. The wave height is much larger for the airboat than for the mosquito.

Explanation:PLATO question

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The rapid decomposition of sodium azide, NaN3, to its elements is one of the reactions used to inflate airbags: 2 NaN3 (s)  2 N
masha68 [24]

<u>Answer:</u> The amount of nitrogen gas produced is 3.864 grams

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

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

Given mass of NaN_3 = 6.00 g

Molar mass of NaN_3 = 65 g/mol

Putting values in equation 1, we get:

\text{Moles of }NaN_3=\frac{6.00g}{65g/mol}=0.092mol

For the given chemical reaction:

2NaN_3(s)\rightarrow 2Na(s)+3N_2(g)

By Stoichiometry of the reaction:

2 moles of NaN_3 produces 3 moles of nitrogen gas

So, 0.092 moles of NaN_3 will produce = \frac{3}{2}\times 0.092=0.138mol of nitrogen gas

Now, calculating the mass of nitrogen gas by using equation 1, we get:

Molar mass of nitrogen gas = 28 g/mol

Moles of nitrogen gas = 0.138 moles

Putting values in equation 1, we get:

0.138mol=\frac{\text{Mass of nitrogen gas}}{28g/mol}\\\\\text{Mass of nitrogen gas}=(0.138mol\times 28g/mol)=3.864g

Hence, the amount of nitrogen gas produced is 3.864 grams

7 0
3 years ago
Please help!!
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Answer:

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Explanation:

5 0
3 years ago
Geologist know that potassium 40 decays to argon 40, with a half life of 1.3 billion years. analysis of a hypothetical sample of
meriva

First let us calculate for the rate constant k from the formula:

k = ln(2) / t0.5

where t0.5 is the half life

k = ln(2) / 1.3x10^9 years

k = 5.33x10^-10 years-1

 

Then we use the formula:

A/Ao = e^-kt

where A/Ao is the amount remaining = 25% = 0.25, t is time

 

Rearranging to get t:

t = ln(A/Ao) / -k

t = ln(0.25) / (-5.33x10^-10 years-1)

t = 2.6x10^9 years

4 0
4 years ago
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Which model shows 6 electrons in the outer shell of the atom?
antiseptic1488 [7]

Answer:

The models which shows 6 electrons in the outer shell are Oxygen, Sulfur, Selenium, Tellurium and the radioactive element Polonium

6 0
3 years ago
A species of butterfly lives in a warm climate. The butterflies feed on the nectar of tropical flowers. Birds eat the butterflie
tensa zangetsu [6.8K]

Answer: the destruction of the butterflies’ environment

Explanation:

A mutation that would result in darker wings will mean that the birds that prey on them will stop eating a lot of them so this won't lead to extinction.

A decrease in the birds that eat the butterflies will also mean that the butterflies will survive more because they will have less predators.

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If their habitat was destroyed however, the butterflies might find it hard to survive as any new environment they go to might not be suitable leading to their extinction.

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