Chemistry, 09.03.2020 04:22, ilovebeans25423

I need to show work can someone help me out plz

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answered: sickboi

5) How many moles does 80 grams of H2) represent?

The molar mass of water can be calculated by adding molar mass of the individual elements:

1 g/mol + 1 g/mol + 16g/mol = 18 g/mol of H2O

We need to calculate moles in 80 gram of water, therefore,

80 g H2O × 1mol H2O/18g H2O

= 4.44 mol H2O

6) What is the mass of 2.0 moles of LiOH?

The mass can be calculated by multiplying number of moles by its molar mass. In this case,

n = 2.0, and

molar mass = 23.95g/mo

We know that

mass = n × molar mass.

= 2.0mol × 23.95g/mo

= 48g

7). How many atoms does 2.0 moles of He represent?

The number of atoms can be calculated by using the formula

n (mol) = number of atoms / avogadro's number ( $N_{A}$ )

We can write it as follows,

number of atoms of He = n (mol) · $N_{A}$

We know that $N_{A}$ is equal to 6.02X10^23. Hence, the total number of atoms can be calculated as follows,

number of atoms of He = 2.0 moles X (6.02X10^23)

= 12.04X10^23 atoms

8). Convert 3.01x10^23 molecules of C2H6 to moles.

Number of molecules (N) can be converted to the number of moles (n) using the following formula

$n = \frac{N}{N_{A}}$

By putting values,

= 3.01x10^23 / 6.02X10^23

= 0.5 moles

9). What would be the mass of 1.20 x 10^24 molecules of water?

To calculate the mass, we will first need to calculate the number of moles of water using following formula,

number of moles = number of molecules / avogadro's number.

number of moles = 1.20x10^24 / 6.02x10^23

number of moles = 1.99.

Then, we will multiply number of moles of water by water's molecular mass.

mass = 1.99 x 18.0 g/mol

mass = 35.8 g water

10) How much mass does 1.51 x 10^22 atoms of neon represent?

The total mass can be calculated using the following approach,

mass = number of atoms x (1 mole / avogadro's number) x neon molecular mass

= 1.51x10^22 atoms x (1 mole / 6.022x10^23 atoms) x (20.18 g/mole)

= 0.503 g Ne

answered: Guest

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

answered: Guest

The grandmother cell is a hypothetical neuronthat represents a complex but specific concept or object.[1] it activates when a person "sees, hears, or otherwise sensibly discriminates"[2] a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the gnostic neuron, was proposed two years later