3 years ago

Why is overuse of resources a problem ?????

1 answer:

3 0

Answer: the overuse of resources will lead to a decline of the resources, the question was a little non specific so this was the best I could do :)

Explanation:

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What is a star good explanation

Natasha2012 [34]

Answer:

A star is a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity. Nuclear fusion reactions in its core support the star against gravity and produce photons and heat, as well as small amounts of heavier elements. The Sun is the closest star to Earth.

Explanation:

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3 years ago

How many moles of CO2 are produced when 1 mole wax C31H64 is burned?<br><br> 31 32 64 or 47

Lana71 [14]

Answer:

31 moles

Explanation:

The balanced combustion reaction of the wax, $C_{31}H_{64}$ is shown below as:

$C_{31}H_{64}+47O_2\rightarrow 31CO_2+32H_2O$

As seen from the reaction,

1 mole of wax, $C_{31}H_{64}$ on combustion produces 31 moles of carbon dioxide, $CO_2$

<u>Hence, moles of $CO_2$ when 1 mole of wax, $C_{31}H_{64}$ is burnt = 31 moles</u>

4 0

3 years ago

Read 2 more answers

5. The number of atoms in 9.2 g of Na will be: A. 6.2 x 1023 atoms B. 2.408 x 1023 atoms C. 9.2 x1023 atoms D. 23 atoms E. 9.2 a

cluponka [151]

Answer:

The answer is "Option B"

Explanation:

Formula:

Na atoms= Na atoms moles \times NA

$= \frac{mass}{Na \ Molar\ mass} \times 6.022 \times 10^{23}\\\\= \frac{9.2}{23} \times 6.022 \times 10^{23}\\\\=0.2875 \times 6.022 \times 10^{23}\\\\=2.4 \times 10^{23}\ atoms \\\\$