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3 years ago

11

How do astronomers explain the formation of the milky way galaxy

1 answer:

nadezda [96]3 years ago

3 0

Galaxy Formation. One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. The other, which has gained strength in recent years, says the young universe contained many small "lumps" of matter, which clumped together to form galaxies.

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3. How does this difference in language relate to our propensity to save?

stich3 [128]

Answer:

If you speak a futureless language, you will speak about time identically meaning you will feel as they are identical, it increases your propensity to save.

Explanation:

hope this helps you :)

8 0

3 years ago

I'm not 100% sure of the answer. Explanations are highly appreciated.

PolarNik [594]

Answer:

The correct answer is

B.

$\Delta H=2(1072)+498 -4(799)$

Explanation:

Enthalpy of reaction :

It is the amount of energy released/absorbed when one mole of the substance is formed from the reactant at a constant pressure.

The enthalpy of a reaction can be calculated using :

$\Delta H=\Delta H_{reactants}-\Delta H_{products}$

$2CO+O_{2}\rightarrow 2CO_{2}$

$\Delta H_{reactants}=2(C\equiv O)+O=O$

$\Delta H_{reactants}=2(1072)+498$

$H_{products}=2(2\times C=O)$

$H_{products}=4\times 799$

$\Delta H=\Delta H_{reactants}-\Delta H_{products}$

$\Delta H=2(1072)+498 -4(799)$

$units = \frac{kJ}{mole}$

Please note that :

The carbon monoxide , CO should be taken as C triple bond O. Not C=O .

So , the bond energy =1072 is used

$\Delta H=2(1072)+498 -4(799)$

8 0

3 years ago

Which statement describes the energy changes that occur as bonds are broken and formed during a chemical reaction? 1.Energy is a

Snowcat [4.5K]

Answer:

C

Explanation:

Br + Br-> Br2 (covalent bond)

bond formation releases energy, as the Br's are in a lower energy state like Br2

6 0

3 years ago

If 30.943 g of a liquid occupy a space of 35.0 ml. What is the density of the liquid in g/cm3?

timofeeve [1]

Mass / volume = density
30.943g / 35ml = 0.88408571g/ml

7 0

3 years ago

Read 2 more answers

The experimental apparatus represented above is used to demonstrate the rates at which gases diffuse. When the cotton balls are

cestrela7 [59]

The correct answer is —-C

5 0

3 years ago