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Vilka [71]
3 years ago
14

Which model uses nuclear fusion Thomason model or the Bohr model (it’s the second bullet point)

Chemistry
1 answer:
Diano4ka-milaya [45]3 years ago
8 0

Answer:

Aye bro you from discovery too

Explanation:

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Which statement best describes how a catalyst increases the rate of a reaction?
Ainat [17]
A catalyst "provides an alternate reaction pathway with a lower activation energy". (2) is the correct answer.

Activation energy is the energy needed to conduct a chemical reaction. When a catalyst is put into the system, it makes the system require less activation energy, making the reaction go faster.

Hope this is helpful~ 
3 0
3 years ago
Read 2 more answers
PLEASE PLEASE HELP ME!! I WILL BRAINLIST YOU!! A 28.0 g sample of N2 is in a rigid 4.50 L container at 32 °C. Calculate the pres
chubhunter [2.5K]

Answer:

P=4184.36 torr

Explanation:

For this problem we can use the idea gas law,

PV=nRT

where P is pressure, V is volume, n is moles of substance, R is the constant, and T is temperature, We will need to manipulate it and a couple values so that we can get our answer in torr. To do this, let's rearrange the equation to solve for P.

P=\frac{nRT}{V}

Next, let's convert T (32) to kelvin. To do this, add 273 to the value.

32+273=305

Next, let's convert 28g of N2 to moles of N2. To do this, divide 28 by the molar mass of N2 (28.02)

\frac{28.0}{28.01} \\=.99 moles of N2

Next, we need to find out what value of R we need to use. Because you want your answer in torr, we will need to use the value of

R=62.36\frac{torr}{mol*K}

Now that we have all of our values, let's plug them into the equation (I'll be excluding units for simplicity but they cancel out to leave units of torr in the answer)

P=\frac{(.99)(62.36)(305)}{4.50}\\P=4184.36

P=4184.36 torr

<em>Very briefly</em>, I don't know what your periodic table looks like, but mine has nitrogen's molar mass as 14.01. If you have a different mass of nitrogen, this pretty drastically impacts the value. For example, if your nitrogen's molar mass was rounded to 14.0 (making N2 28g) then it would be one mole instead of .99 moles, raising the answer to 4228.70 torr. If you have any different values just plug them in in their proper spots. A similar concept applies to the Kelvin conversion.

6 0
3 years ago
WHAT IS IUPAC OF THIS
Oksanka [162]

Answer:

The Correct IUPAC name is H3C - CH (CH3) - CH (C2H5) - (CH2)2 - CH3 Class 11

Explanation:

ye thiss right it only show this for me like or star or comment if right all is good idc tell me if u got it

7 0
2 years ago
Ten grams of a gas occupies 12.5 liters at a pressure of 42.0 cm Hg. What is the volume when the pressure has increased to 75.0
Fantom [35]
Based on the question, it is evident that the question is based on Boyle's Law which we will use to find the answer necessary.

Now, Boyle's Equation: P₁V₁ = P₂V₂

     V₂ = P₁V₁  ÷  P₂

∴   V₂  =  (12.5L × 42.0 cm · Hg) ÷ 75 cm · Hg

⇒  V₂  = 7 L
 
Thus, the <span>volume when the pressure has increased to 75.0 cm Hg is 7 Litres.</span>
8 0
3 years ago
Determine which compound would lower the freezing point of water the most?
Nina [5.8K]
All those compounds are ionic.

Then they dissociate into ions when they are in water.

I will write the dissociation equations. The charges of the ions is indicated inside parenthesis.

KI -> K (+) + I (-) => two ions 

K2SO4 -> 2 k(+) + SO4 (2-) -> three ions

NaCl -> Na(+) + Cl(-) => two ions

KBr -> K(+) + Br(-)

As  you se every molecule of the compound K2SO4 dissociates into three ions, while the other compounds dissociate into two ions. Given that the decrase in the freezong point of water is proportional to the number of particles dissolved, the K2SO4 will lower the freezing point the most.

Answer: option B. K2SO4
5 0
3 years ago
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