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2 years ago

Please help me, i don’t understand :(

Chemistry

2 answers:

soldier1979 [14.2K]2 years ago

4 0

Answer:

weathering

Explanation:

different states of the u.s and what climate it is in every state.

Citrus2011 [14]2 years ago

4 0

The map displays weather, and based on the map showed, Texas stormy on mostly the north side as to sunny on south

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It is possible to have more than the maximum amount of solute dissolved in a solvent.

vladimir1956 [14]

B. False

When the maximum amount of solute has been dissolved in a given amount of solvent, we say that the solution is saturated with solute.

3 0

3 years ago

Read 2 more answers

3. A 4.00 gram sample of solid gold was heated from 274K to 314K. How much energy was involved?

MrMuchimi

Q = mcΔT = (4.00 g)(0.129 J/g•°C)(40.85 °C - 0.85 °C)
Q = 20.6 J of energy was involved (more specifically, 20.6 J of heat energy was absorbed from the surroundings by the sample of solid gold).

3 0

2 years ago

stearic acid and linoleic acid stearic acid and linoleic acid stearic acid has the higher melting point, because it has two more

elena55 [62]

Acid palmitic acid has higher melting point, because it has two more methylene groups.

$\text { Myristic acid } \rightarrow \mathrm{CH}_3\left(\mathrm{CH}_2\right)_{12} \mathrm{COOH} \\& \text { Palmitic acid } \rightarrow \mathrm{CH}_3\left(\mathrm{CH}_2\right)_{14} \mathrm{COOH} \\$

Acid palmitic acid has higher melting point, because it has two more methylene groups.

Giving it a greater surface area and therefore more intermolecular van der waals interact than the myristic acid.

stearic arid $\mathrm{CH}_3\left(\mathrm{CH}_2\right)_{16} \mathrm{COOH}$

linoleic acid $\mathrm{C}_{18} \mathrm{H}_{32} \mathrm{O}_2$ (two double bond)

Stearic acid has higher Melting point, because it does not have any Carbon-Carbon double bonds, whereas linoleic acid has two cis double bonds which prevent the molecules from packing closely together.

Oleic Acid and Linoleic acid.

$\mathrm{C}_{18} \mathrm{H}_{34} \mathrm{O}_2$ -one double bond (cis)

Acid palmitic acid has higher melting point, because it has two more methylene groups.

For more such question on methylene group.

brainly.com/question/4279223

#SPJ4

4 0

1 year ago

State two safety precautions to be taken when performing diluting concentrated sulphuric acid with water

motikmotik

Explanation:

safety precautions to be taken when performing diluting concentrated sulphuric acid with water

Using gloves while diluting to avoid injury from hot sulfuric acid to hands.
Wearing safety glasses to protect eyes
Must wear lab coat before performing any chemistry practical
Safety boots to protect your legs.

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4 0

1 year ago

An energy profile for the reaction A⇌B (left), and the change in concentration of B as a function of time (right), with and with

RoseWind [281]

Answer:

What quantity dictates the speed of a reaction? The activation energy

Explanation:

According to the collision theory, when molecules collide, they must overcome an energy barrier for the reaction to take place. This energy, known as activation energy, is represented by the difference in energy between the initial state and the transition state. The higher the activation energy, the slower the reaction. That's why catalysts reduce the activation energy to accelerate the reaction.

3 0

3 years ago