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3 years ago

What does unicellular mean

Chemistry

2 answers:

NNADVOKAT [17]3 years ago

6 0

characterized by the formation or presence of a single cell or cells.
Or consisting of a single cell.

Zepler [3.9K]3 years ago

3 0

Consisting of a single cell.

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What is the molar mass of CHCl3? 48.47 g/mol 83.92 g/mol 119.37 g/mol 121.39 g/mol

kolbaska11 [484]

119.37 g/mol

<h3>Further explanation</h3>

Relative atomic mass (Ar) and relative molecular mass / molar mass (M)

the molar mass/molecular mass of a compound : the sum of the relative atomic mass (Ar) of the constituent atoms

M AxBy = (x.Ar A + y. Ar B)

Atomic weight (Ar) of :

C : 12.0107 g/mol
H : 1.00784 g/mol
Cl : 35.453 g/mol

The molar mass of CHCl₃

$\tt CHCl_3=12.0107+1,00784+(35,453\times 3)=119.37~g/mol$

8 0

3 years ago

Read 2 more answers

The elements of which group in the periodic table release the most energy by gaining an electron?

Mademuasel [1]

Answer:

The halogens located in group 17

Explanation:

The change in energy of a neutral atom when an electron is added is known as electron affinity. Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At) are known as halogens and conform the group 17 of the periodic table, the group that presents higher electron affinity. This characteristic happens because of their atomic structures, it is easier for them to gain electrons because they are closer to form octets.

Here I present you halogens' electron affinities values:

Fluorine (F) -328 kJ mol-1
Chlorine (Cl) -349 kJ mol-1
Bromine (Br) -324 kJ mol-1
Iodine (I) -295 kJ mol-1

The use of negative signs is to indicate the RELEASE of energy.

I hope you find this information useful and interesting! Good luck!

5 0

4 years ago

A balloon filled with 39.1 moles of helium has a volume of 876 l at 0.0'c and 1.00 atm pressure. the temperature of the balloon

Elena-2011 [213]

Moles of Helium = 39.1 moles

ΔT = (38.08 – 0.08) ֯C = 38.00 ֯C

Q = nC ΔT = 39.1 * 20.8 J/ ֯C mol * 38.00 ֯C = 30904.64 J

W = P * ΔV = 1atm * (948 - 876) L = 122 atmL

1atmL = 101.325 J

W = 122 * 101.325 J = 12361.65 J

ΔE = q + W = (30904.64 + 12361.65) J = 43266.29 J

Answer is 43266.29 J

6 0

3 years ago

Read 2 more answers

A target is shielded from a radioactive sample by a sheet of metal. What kind of radiation can pass through the sheet of metal a

weeeeeb [17]

A. o. I know gamma can I Hope this helps

A now i remember yeah gamma only

4 0

3 years ago

Read 2 more answers

A solution of barium nitrate has 61.2g of barium nitrate in 1 liter of solution. How many mg of barium are there in 7.5 quarts

Nuetrik [128]

Answer:

220.44g Ba²⁺ ions in solution

Explanation:

Given parameters:

Mass of barium nitrate = 61.2g

Volume of solution = 1 liter

Unkown:

Mass of barium in 7.5quarts of solution?

Solution

We must first convert quarts to its liter equivalence:

1 quarts = 0.95 liter

7.5 quarts = 0.95 x 7.5; 7.125liter

Now, let us find the mass of barium nitrate in a solution of 7.125liter:

Given:

1 liter of solution contains 61.2g of barium nitrate:

7.125 liter will contain 7.125 x 61.2 = 436.05g of barium nitrate.

The formula of the compound is Ba(NO₃)₂:

In solution we have Ba²⁺ + NO₃⁻

Ba(NO₃)₂ → Ba²⁺ + 2NO₃⁻

Number of moles of Ba(NO₃)₂ = $\frac{mass of Ba(NO₃)₂}{Molar mass of Ba(NO₃)₂}$

Molar mass of Ba(NO₃)₂ = 137 + 2[14 + 3(16)] = 271g/mol

Number of moles of Ba(NO₃)₂ = $\frac{436.05}{271}$ = 1.609mole

1 mole of Ba(NO₃)₂ will produce 1 mole of Ba²⁺ ions in solution

therefore, 1.609mole of Ba(NO₃)₂ will also yield 1.609mole of Ba²⁺ ions in solution

Mass of Ba²⁺ ions = Number of moles of Ba²⁺ ions x molar mass of Ba²⁺ ions

Mass of Ba²⁺ ions = 1.609 x 137 = 220.44g

3 0

3 years ago