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3 years ago

Please help I tired of doing this

Chemistry

2 answers:

algol [13]3 years ago

7 0

Answer:

uhh

Explanation:

Wegener found similar evidence when he discovered tropical plant fossils in the frozen region of the Arctic Circle. As Wegener collected more data, he realized the explanation that best fit all the climate, rock, and fossil observations involved moving continents.

Nuetrik [128]3 years ago

3 0

It’s B! … B mine… *WINK WINK* ;)

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Which element is the least attracted in a chemical bond?

Ilya [14]

The answer is Nitrogen.

5 0

3 years ago

2. A 0.5 kg tennis ball has speed of 15m/s. what is the kinetic energy of tennis?

Talja [164]

Explanation:

Given

mass (m) = 0.5 kg

velocity (v) = 15 m/s

Now

Kinetic energy

= 1/2 *m*v²

= 1/2 * 0.5 * 12²

= 0.5 *0.5 * 144

= 36 joule

hope it will help

4 0

3 years ago

Determine the mass in grams of 4.69 x 1021 atoms of barium. (The

Virty [35]

Answer:

1.07 g Ba

Explanation:

Hello there!

In this case, according to the definition of the Avogadro's number and the molar mass, it is possible to say that 6.022x10^{23} atoms of barium equal one mole, and at the same time, 1 mole equals 137.327 grams of this element; thus, it is possible to say that 6.022x10^{23} atoms of barium have a mass of 137.327 grams; therefore, it i possible for us to calculate the required mass in grams as shown below:

$4.69x10^{21}atoms*\frac{137.327gBa}{6.022x10^{23} atoms} \\\\=1.07gBa$

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5 0

3 years ago

2A → B + C The above reaction is run and it is found that a plot of the natural log of the concentration versus time is linear.

Alex17521 [72]

Answer:

zero order reaction

Explanation:

The seem to be a reaction is zero order as the data only fits to zero order integrated rate law.

Integrated rate law:

[A] = [A]_0 – kt

Here y = [ A] and slope is -k , so when we plot concentration of A with respect to t then we get the equation in the form of line

y = mx + c

So the answer Zero order in [A]

3 0

4 years ago

At standard pressure which substance becomes less soluble as temperature increases from 10. °c to 80.°c

Tasya [4]

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3 years ago