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oksano4ka [1.4K]
3 years ago
12

heeellllllllllllllllllllllpppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp

pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp

Chemistry
1 answer:
natima [27]3 years ago
7 0
It should be C but not sure
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In general, nuclear fusion reactions usually release more energy than nuclear fission reactions.
lisov135 [29]
The answer to your question is: true.

Hope this helps!
8 0
3 years ago
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A sample of gold (Au) has a mass of 35.12 g. what is the moles of each element for AU?
vlada-n [284]
To determine the number of moles(n) of a substance, divide its amount given in grams by the molar mass. The element in the problem is gold (Au) which has a molar mass of 196.97 grams per mole. The division is better illustrated below
 
                                     n = 35.12 g / 196.97 grams per mole

The answer to the operation above is 0.1783 moles. Therefore, there are approximately 0.1783 moles of Au in 35.12 grams.


5 0
3 years ago
A theory is a ___.
Dimas [21]

The answer is either A or C. Sorry I'm not much help :)

7 0
4 years ago
A 2.35 g sample of an unknown gas at 55 ∘C and 1.05 atm is stored in a 1.85 L flask.
lbvjy [14]

Answer:

Molar mass =  32.64 g / mol.

The density of gas is 1.3 × 10⁻³g/mL.

Explanation:

Given data:

Mass of sample = 2.35 g

Pressure = 1.05 atm

Volume = 1.85 L    (1.85 × 1000 = 1850 ml)

Temperature = 55 °C    (55+ 273.15 = 328.15 K)

Density = ?

Formula:

d = m/ v

The volume of flask would be the volume of gas.

d = 2.35 g / 1850 mL = 0.0013 g/mL or 1.3 × 10⁻³g/mL

The density of gas is 1.3 × 10⁻³g/mL.

Molar mass:

Now we will calculate the moles of a gas first in order to find the molar mass of a gas.

Formula:

PV =nRT

n = number of moles.

n = PV / RT

n = 1.05 atm × 1.85 L / 0.0821 atm. dm³. K⁻¹ . mol⁻¹ × 328.15 K

n = 1.9425 atm . L / 26.941115 atm . dm.³mol⁻¹

n = 0.072 mol

Now we will find the molar mass.

Number of moles = mass / molar mass

0.072 mol = 2.35 g / molar mass

Molar mass = 2.35 g / 0.072 mol

Molar mass =  32.64 g / mol

8 0
3 years ago
Read 2 more answers
)Which element has the same number of energy levels as aluminum?)
Pie

Answer:

The correct answer is Magnesium (Mg)

5 0
3 years ago
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