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Allisa [31]
3 years ago
13

Which statements describe seismic waves? Select three options.

Chemistry
2 answers:
Alenkasestr [34]3 years ago
8 0

Answer:

A, C, E

Explanation:

Tcecarenko [31]3 years ago
7 0

Answer: A C E

Explanation: TOOK THE TEST

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A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in
Akimi4 [234]

Answe5r:

Explanation:

4 0
3 years ago
Calculate how many moles of silver nitrate (AgNO3) are in 1.35 L of a 4.25 M solution of silver
Svetach [21]

Answer:

is

Explanation:

is

3 0
3 years ago
Find the boiling point?<br> 100. g of C2H6O2 dissolved in 200 g of H2O?
aleksklad [387]

Answer:

The correct answer is 104.13ºC

Explanation:

When a solute is added to a solvent, the boiling point of the solvent (Tb) increases. That is a colligative property. The increment in Tb (ΔTb)  is given by the following expression:

ΔTb = Tb - Tbº= Kb x m

Where Tb and Tbº are the boiling points of the solvent in solution and pure, respectively; Kb is a constant and m is the molality of the solution.

In this problem, the solvent is water (H₂O). It is well known that water has a boiling point of 100ºC (Tb). The value of Kb for water is 0.512ºC/m. So, we have to calculate the molality of the solution (m):

m = moles of solute/Kg solvent

The solute is C₂H₆O₂ and we have to calculate the number of moles of this component by dividing the mass into the molecular weight (Mw):

Mw(C₂H₆O₂)= (2 x 12 g/mol) + (6 x 1 g/mol) + (2 x 16 g/mol)= 62 g/mol

⇒ moles of C₂H₆O₂ = mass/Mw = 100 g/(62 g/mol) = 1.613 moles

Now, we need the mass of solvent (H₂O) in kilograms, so we divide the grams into 1000:

200 g x 1 kg/1000 g = 0.2 kg

Finally, we calculate the molality as follows:

m = 1.613 moles of C₂H₆O₂/0.2 kg = 8.06 moles/kg = 8.06 m

The increment in the boiling point will be:

ΔTb = Kb x m = 0.512ºC/m x 8.06 m = 4.13ºC

So, the boiling point of pure water (Tbº=100ºC) will increase in 4.13ºC:

Tb= 100ºC+4.12ºC= 104.13ºC

5 0
3 years ago
. In which type of ecosystem would fire most likely be a limiting factor for plant species?
bulgar [2K]

Answer:

A forest or woodland area

Explanation:

Forests or woodland areas have lots of plants and grass like things that wuld burn easily

8 0
3 years ago
Please help! I really need help on this!​
sineoko [7]

Answer:

I wanna say c

Explanation:

It makes the most sense, because non-metals don't produce an electrical current, and therefore aren't conductors.

5 0
3 years ago
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