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Amiraneli [1.4K]
2 years ago
6

According to the big bang theory, which statement is accurate about how the universe came to be?

Chemistry
2 answers:
Drupady [299]2 years ago
5 0
Well there are 4 components of the Big Bang theory:

The first is that the universe is constantly expanding. When the Big Bang happened it started as a small, condensed, ball of Hydrogen that was smaller than a pinhead. This means that when it exploded it started expanding rapidly. In 1912, Slipher figured out that everything was moving away from us by measuring distances, but he thought it was all in the Milky Way Galaxy. In 1942, however, Hubble figured out that it wasn’t just the Milky Way Galaxy. He figured out that everything in the UNIVERSE was moving away, not just things in the Milky Way Galaxy. This started more interest in the theory. They found out that nothing was more than 13. 8 billion years old, therefore making the whole universe 13.8 billion years old. This made everyone realize that the whole universe started 13.8 billion years ago, or the Big Bang.

The second is that all of the elements in the universe are in the same ratio everywhere. What this means is that in every single point in the universe has the same exact amount of elements, which are Hydrogen and Helium. Due to this, scientists believe that the tiny ball, smaller than a pinhead, was heavily compressed star that exploded. This star was no ordinary star. This was more heavily compacted than any black hole there is. There was no other elements besides Hydrogen. So, when the “star” exploded the heat and pressure of the explosion was enough to create a universe after it cooled down.

The third is that the Big Bang created cosmic radiation. Light is a wave. For the light to change to microwaves it needed a catalyst which was the explosion. When it exploded the light waves expanded so much they became a new type of wave, a microwave. Think about it like this. Imagine you have a 6 foot wave at the beach. Then a mountain falls on the water creating a mile high beach wave. When the “star” exploded it was like a trillion mountains fell on itself creating a big enough ripple to turn light waves into microwaves. But the wave doesn’t just happen immediately. It would probably take at least a minute for the wave to get that high. When the Big Bang happened, it took a long time for the light waves to turn into microwaves. Which is why the Big Bang happened because like it said earlier it takes along time to make microwaves so 13.8 billion years is plenty of time to make microwaves.

The fourth is that gravity created the universe. When the Big Bang happened everything expanded outward. When the universe cooled itself after 10,000 years, gravity became the dominant force and pulled everything back together to create galaxies, stars, planets, etc. Because everything had exploded outward in the Big Bang, we see these objects throughout the universe. If the Big Bang had not happened, everything would still be tightly compressed together. Think about it like this. When dynomite goes off it sends everything around it back. That is not what happened with the Big Bang. There was nothing there to send it back. To better understand it think about a bread dough with chocolate chips inside. It starts as one thing and when heat is added it expands and everything in it expands away from one another. Like when the Big Bang happened, all of the things tightly compacted together expanded like the rising of the bread.

So to answer your question: The answer is complicated. Technically it could be C, however, I think the answer they are looking for is A because that is the only one that happened immediately.
Vlad1618 [11]2 years ago
4 0

stars and galaxies were formed

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How much thermal energy is in 100 grams of water at 50 degrees Celsius
Ymorist [56]
when the thermal energy is the energy contained within a system that is responsible for its temperature.  

and when the thermal energy  is can be determined by this formula:

q = M * C *ΔT

when q  is the thermal energy

and M is the mass of water = 100 g 

and C is the specific heat capacity of water = 4.18 joules/gram.°C

and T is the difference in Temperature = 50 °C

So by substitution:

∴ q = 100 g * 4.18 J/g.°C * 50

   = 20900 J  = 20.9 KJ
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When is balance achieved between the forward and reverse reactions?
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Equilibrium occurs when forward and reverse directions of a reversible reaction occur at the same rate so there is no overall change in the amounts of reactants and products.

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3 years ago
A 0.964 gram sample of a mixture of sodium formate and sodium chloride is analyzed by adding sulfuric acid. The equation for the
frosja888 [35]

Answer: 67.8 %.

Explanation:

Okay, let us delve right into the solution to the question;

The balanced chemical reaction is given by the equation (1) below;

2 HCOONa + H2SO4 ---------> 2 CO + 2 H2O + Na2SO4. ----------------------------------------------------------------------------(1).

From the balanced chemical reaction in equation (1) above we can see that; 2 moles of HCOONa reacts with one moles of tetraoxosulphate acid, H2SO4 to produce 2 moles of carbonmonoxide,CO; 2 moles of water, H2O and 1 mole of sodium tetraoxosulphate, Na2SO4.

The parameters given from the question are; total atmospheric pressure, P(t) = 752 torr, volume of CO= 242 mL = 0.242 Litres.

STEP ONE : find the carbon monoxide,CO pressure; P(CO).

Using the formula below;

P(t) = P(CO) + P(H2O). Hence;

P(CO) = P(t) - P(H2O). Note that P(H2O)= 19.8 torr.

==>P(CO)= 752 torr - 19.8 torr = 732.2 torr.

STEP TWO: calculate the number of moles of Carbonmonoxide,CO.

Using the formula below;

Number of moles= pressure(P) × volume(v) / gas constant(R) × temperature (T).

That is, n= PV/RT.

n= 732 torr × 0.242 Litres/ 62.4 × 295.15.

= 9.62 × 10^-3 mol of CO.

STEP THREE:

2 moles of HCOONa = 2 moles of CO.

=> 2 moles of HCOONa = 2 moles of CO/ 2 moles of CO = 1 mol( HCOONa/ CO).

Then, 9.62 × 10^-3 mol of CO × 1 mol( HCOONa/ CO).

==> 9.62 × 10^-3 mol HCOONa × molar masss of HCOONa(68 grams/mol)

= 0.654 grams.

Therefore, the percentage of sodium formate in the original mixture = 0.654 grams/ 0.964 gram × 100 = 67.8 %.

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8 0
2 years ago
With the Haber process, how many grams of hydrogen will be needed to make 0.3820 pounds of ammonia? Needed to 3 decimal places f
masya89 [10]

30.576 g of hydrogen

Explanation:

First we need to covert the pound in grams.

if        1 pound is equal to 453.592 grams

then  0.3820 pounds is equal to X grams

X = (0.3820 ×  453.592) / 1 = 173.272 grams

So we have 173.272 grams of ammonia.

Now we look at the chemical reaction where hydrogen (H₂) reacts with nitrogen (N₂) to produce ammonia (NH₃):

3 H₂ + N₂ → 2 NH₃

number of moles = mass / molar weight

number of moles of ammonia = 173.272 / 17 = 10.192 moles

Now taking in account the chemical reaction, we formulate the following reasoning:

if         3 moles of hydrogen produce 2 moles of ammonia

then    Y moles of hydrogen produce 10.192 moles of ammonia

Y = (3 × 10.192) / 2 = 15.288 moles of hydrogen

mass = number of moles × molar weight

mass of hydrogen = 15.288 × 2 = 30.576 g

Learn more about:

problems with number of moles

brainly.com/question/13950919

brainly.com/question/13947602

#learnwithBrainly

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