Which of the following would be found in both eukaryotic AND prokaryotic cells?

Chemistry

2 answers:

beks73 [17]3 years ago

7 0

Nucleus ,endoplasmic reticulum

ladessa [460]3 years ago

7 0

Answer:

Explanation:

the Nucleus and Endoplasmic Reticulum are both found in both eukaryotic and prokaryotic cells, but the necleus is the more common answer.

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What is the melting point of a solution in which 2.5 grams of sodium chloride is added to 230 mL of water?

Lemur [1.5K]

To get the melting point of a solution so, we will use this formula:

ΔT = - mKf

when:

m is molality of the solution

Kf is cryoscopic constant of water = 1.86 C/m

and ΔT is the change in melting point (T2 - 0 °C)

so, now we need to calculate the molality to substitute:

when the molality = moles NaCl / Kg of water

and when moles NaCl = mass / molar mass

= 2.5 g / 58 g/mol

= 0.043 mol
∴ Kg water = volume *density /1000

= 230 mL * 1 g/mL / 1000

= 0.23 Kg
∴ molality = 0.043 / 0.23 =0.187 M

by substitution:

T2-0°C = - 0.187 * 1.86

∴T2 = - 0.348 °C

5 0

3 years ago

Some alkenes have geometric (cis-trans) isomers because ________. all of the carbon atoms in the compound are rigid and cannot r

faust18 [17]

Answer:

the carbon atoms in the double bond cannot rotate

Explanation:

Isomers refer to molecules that have a distinct arrangement of the atoms in the molecule but have the same molecular formula.

Alkenes refer to a series of unsaturated hydrocarbons that contain ethylene and propylene.

Some alkenes have geometric (cis-trans) isomers because <u>the carbon atoms in the double bond cannot rotate</u>.

7 0

3 years ago

Four gases were combined in a gas cylinder with these partial pressures: 3. 5 atm N2, 2. 8 atm O2, 0. 25 atm Ar, and 0. 15 atm H

aksik [14]

The total pressure of the gas has been 11.9 atm.

The partial pressure has been the pressure exerted by the individual gas in the mixture.

According to the Dalton's law of Partial pressure, the pressure of the gas has been the sum of the partial pressure of each gas in the mixture.

<h3 /><h3>Computation for the pressure of gas</h3>

The given gas has partial pressure of Nitrogen, $P_{N_2}=3.5\;\rm atm$