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3 years ago

Which weighs more, a ton of bricks or

Chemistry

2 answers:

Oliga [24]3 years ago

8 0

Both weigh in the same but the feathers has more pieces in it

Mice21 [21]3 years ago

3 0

Answer:

They equal the same

Explanation:

Because A ton of feathers and A ton of bricks. They both equal A ton.

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How many molecules of CH4 are in 24.1 g of this compound?

jok3333 [9.3K]

1) find molar mass of CH₄

$=12.01+4(1.01)\\\\=16.05\ g/mol$

2) determine moles of CH₄

$=24.1g\ CH_{4}\ x\ \frac{1\ mol\ CH_{4}}{16.05g\ CH_{4}}\\\\=1.501557632\ mol\ CH_{4}$

3) multiply by avogadro's number

$=1.501557632\ mol\ CH_{4}\ x\ \frac{6.022\ x\ 10^{23}\ molecules\ CH_{4}}{1\ mol\ CH_{4}} \\\\=9.04238006\ x\ 10^{23}\\\\=9.04\ x\ 10^{23}\ molecules\ CH_{4}$

7 0

2 years ago

The radioactivity due to carbon-14 measured in a piece of a wood from an ancient site was found to produce 20 counts per minute

ss7ja [257]

Answer:

The answer is "17200 years".

Explanation:

Given:

$A = 20 \ \frac{counts}{minute}\\\\A_{o} = 160\ \frac{counts}{minute}$

Let the half-life of carbon-14, is beta emitter, is $T = 5730\ years$

Constant decay $\ w = \frac{0.693}{ T}$

$= 1.209 \times 10^{-4} \ \frac{1}{year}\\$

The artifact age $t= ?$

$A = A_{o} e^{-wt} \\\\e^{-wt} = \frac{A}{A_{o}}\\\\-wt = \ln \frac{A}{A_{o}}\\\\= -2.079\\\\t = 1.7199 \times 10^{4} \ years\\\\\sim \ 17200\ years\\$

5 0

3 years ago

Which of the following models give the volume of a molecule?

Lelu [443]

Answer:

Space filling model

Explanation:

not sure

4 0

4 years ago

The molecule shown here can decolourise bromine water (above)

Sedaia [141]

Answer:

B hopefully this helps you

3 0

3 years ago

Which of the following is a biotic of an ecosystem a rock air grass climate

Zigmanuir [339]

Grass is biotic- living.

please vote my answer brainliest. thanks!

7 0

4 years ago