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attashe74 [19]
3 years ago
11

Which term best describes how the solar system form?

Chemistry
2 answers:
KengaRu [80]3 years ago
5 0
Which figure is closest to the age of the solar system?
4.5 billion years

What force pulled the solar system together out of a cloud of gas and dust?
Gravity

Which term best describes how the solar system is formed?
Gradually
Inessa [10]3 years ago
4 0
Which term best describes how the solar system is formed
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What is the most abundant gas in the atmosphere is _____. argon oxygen nitrogen hydrogen
Serga [27]
Hey there princesswalkeror4ori,

By far, the most abundant gas in the Earth's atmosphere<span> is </span>nitrogen<span>, which accounts for about 78% of the mass of dry air. </span>Oxygen is<span> the next most abundant gas, present at levels of 20 to 21%. Although humid air seems like it contains a lot of water, the maximum </span>amount of water vapor<span> that air can hold is only about 4%.
</span>
Hope I helped!

Have a great day!

7 0
3 years ago
Read 2 more answers
Naturally occurring copper exists in two isotopic forms: 63Cu and 65Cu. The atomic mass of copper is 63.55 amu. What is the appr
Mariulka [41]
To calculate the average atomic weight, each exact atomic weight is multiplied by its percent abundance, then, add the results together.  If the natural abundance of 63Cu is assigned x, the natural abundance of 65Cu is 1-x (the two abundance always add up to 1). So the solution is: (63)(x)+(65)(1-x) = 63.55, 63x+65-65x=63.55, x=0.725=72.5%. The natural abundance of 63Cu is 72.5%, that of 65Cu is 1-72.5%=27.5%.
3 0
3 years ago
Classify the following reactions into: Element – Element, Element – Compound, Compound – Compound
Rudiy27

Answer:

1. CaO + H₂O ----> Ca(OH)₂

Compound ----- Compound

2. 2 Na + Cl₂ ----> 2 NaCl

Element ----- Element

3. 2 SO₂ + O₂ ----> 2 SO₃

Element ----- Compound

3 0
2 years ago
Calculate the ratio of naf to hf required to create a buffer with ph = 4.05.
NARA [144]
PH is the test of acidity or basicity of a solution. it follows the formula: 
pH = pKa + log [salt] / [acid] where NaF is the salt and HF is the acid in this case. 

By literature, Ka of HF is 3.5*10^-4 
<span>pKa= -log(Ka)=</span><span> 3.46 </span>

<span>pH = pKa + log [NaF / [HF] </span>

4.05 = 3.46 + log [NaF / [HF] 

log [NaF / [HF]<span> = 0.59
</span>
[NaF / [HF] = 3.89
4 0
3 years ago
Read 2 more answers
If 10.0g of oxygen reacts with 10.0g of hydrogen, how many grams of water can be
rusak2 [61]

Answer:

the answer is 90g

Explanation:

2g of H2 produce 18g of H2O/10.0g of H2 to produce x the answer is 90g

8 0
3 years ago
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