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3 years ago

In the following question, select the odd word from the given alternatives.

Chemistry

1 answer:

mote1985 [20]3 years ago

5 0

Answer:

Explanation:

A B and D are all fosil fuses c is not

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which astronomer supported the belief that earth was at the center of the universe while all other planets and celestial objects

-BARSIC- [3]

Ptolemy's philosophy consisted of these said beliefs.

3 0

3 years ago

If a frog initially contained 2 grams of carbon-14 and the half-life of carbon-14 is 5,730 years, how much carbon-14 remains in

andreyandreev [35.5K]

Half life is the time taken for a radioactive isotope to decay by half its original mass. In this case the half life of carbon-14 is 5.730 years.
Using the formula;
New mass = original mass × (1/2)^n; where n is the number of half lives (in this case n=1 )
New mass = 2 g × (1/2)^1
= 1 g
Therefore; the mass of carbon-14 that remains will be 1 g

5 0

3 years ago

10.0 grams of water are heated during the preparation of a cup of coffee 1.0x 103 j of the heat are added to the water. which is

nirvana33 [79]

Answer: The final temperature of the coffee is 43.9°C

Explanation:

To calculate the final temperature, we use the equation:

$q=mC(T_2-T_1)$

where,

q = heat released = $1.0\times 10^3J=1000J$

m = mass of water = 10.0 grams

C = specific heat capacity of water = 4.184 J/g°C

$T_2$ = final temperature = ?

$T_1$ = initial temperature = 20°C

Putting values in above equation, we get:

$1000J=10.0g\times 4.184J/g^oC\times (T_2-20)\\\\T_2=43.9^oC$

Hence, the final temperature of the coffee is 43.9°C

8 0

3 years ago

Calculate the work done when a force of 4 N pulls a box along the floor for a distance of 0.3 m.

Yuki888 [10]

Answer:

<h2>1.2 Joule</h2>

solution,

Force=4 N

Distance=0.3 m

Now,

 $work = f \times d \\ \: \: \: \: \: \: \: \: \: \: \: = 4 \times 0.3 \\ \: \: \: \: \: \: \: \: \: \: \: = 1.2 \: joule$ 

hope this helps...

Good luck on your assignment....

8 0

4 years ago

What is the mass of 3.0 x 10^23 atoms of neon

kari74 [83]

Molar mass neon = 20.1797 g/mol

20.1797 g ---------- 6.02x10²³ atoms
? g ------------ 3.0 x 10²³ atoms

mass = 3.0 x 10²³ * 20.1797 / 6.02 x 10²³

mass = 6.054x10²⁴ / 6.02 x 10²³

mass = 10.05 g

hope this helps!

6 0

3 years ago

Read 2 more answers