1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Goshia [24]
3 years ago
15

Choose all the answers that apply.

Chemistry
1 answer:
9966 [12]3 years ago
6 0
The answer would be B 
You might be interested in
Is dimethyl amine and triethylamine more soluble in water?
kompoz [17]
No, dimethyl amine and triethyl amine are not more soluble in water. Both are soluble in water but not more soluble in water. These are also soluble in alcohol.
Dimethyl amine is a secondary amine while triethyl amine is a tertiary amine. Generally, the small amines are more soluble in water. As the hydrocarbon chain goes on increasing, the solubility goes on decreasing.
4 0
3 years ago
some places such as caves and sinkholes have lower elevations than surrounding areas infer how a sink might be shown on a topogr
Andreyy89

Answer:

By closed contours with hachures

Explanation:

A sinkhole is a depression in the ground that forms when water erodes an underlying rock layer.

Sinkholes are denoted by closed contours with tick marks (hachures) that point towards lower ground.

The topographical map below shows the difference between the contours of a hill and those of a sinkhole.

5 0
3 years ago
What is the cause of change over time in a population?
Y_Kistochka [10]

The environment modifies.

Explanation:

A modification of the environment can lead to population changes overtime. The environment is very important for population dynamics.

It is predominantly made up of the factors that affects organisms and where they live.

If the resources in an environment gets depleted, organisms will be force to migrate from that place to another in search of more nutrient areas.

This and many other factor like climate, stability, etc causes changes to the population through time.

learn more:

Population brainly.com/question/6233803

#learnwithBrainly

3 0
3 years ago
Calculate the value of ΔG°, ΔH°, & ΔS° for the oxidation of solid elemental sulfur to gaseous sulfur trioxide at at 25°C.​2S
Liula [17]

Answer:

ΔG° = -750324.96 J/mol = -750.324 Kj/mol

ΔH° = - 790.4 kJ/mol = -790400 j/mol

ΔS° =  = - 134.48 J K-1mol-1

Explanation:

(S, rhombic) + 3O2( g) → 2SO3 (g)

Temperature = 25°C + 273 = 298K (Converting to kelvin temperature.)

The formulae relating all four paramenters (ΔG°, T, ΔH°, & ΔS°) is given as;

ΔG° = ΔH° - TΔS°

All H and S values used are measurements at 25°C

Calculating ΔH

You started with 1 mole of Sulphur and 3 moles of oxygen.

Total starting enthalpy = 0+ 3(0) = 0 kJ/mol

You ended up with 2 moles of SO3.

Total enthalpy at the end = 2(-395.2) = - 790.4 kJ/mol

enthalpy change = what you end up with - what you started with.

ΔH = enthalpy change =  - 790.4 kJ/mol - 0 kJ/mol = - 790.4 kJ/mol = -790400 j/mol

Calculating ΔS

You started with 1 mole of Sulphur and 3 moles of oxygen.

Total starting entropy =31.88 + 3(205) = 646.88 J K-1mol-1

You ended up with 2 moles of SO3.

Total entropy  at the end = 2(256.2) = 512.4 J K-1mol-1

entropy change = what you end up with - what you started with.

ΔS = entropy change =  512.4 J K-1mol-1 - 646.88 J K-1mol-1

= - 134.48 J K-1mol-1

Inputing the values into the formular, we have;

ΔG° = ΔH° - TΔS°

ΔG° = - 790400 - 298 (- 134.48)

ΔG° =  - 790400 + 40075.04

ΔG° = -750324.96 J/mol = -750.324 Kj/mol

4 0
3 years ago
What is the molarity of a 50.0 mL solution that contains 0.0350 mol of sodium sulfate, Na2SO4?
Ymorist [56]

Answer:

The molarity of a 50.0 mL solution that contains 0.0350 mol of sodium sulfate 0.7 \frac{moles}{liter}

Explanation:

Molarity is a concentration measure that indicates the amount of moles of solute that appear dissolved in each liter of the mixture.

So, the Molarity of a solution is determined by the expression:

Molarity (M)=\frac{number of moles of solute}{volume}

Molarity is expressed in units (\frac{moles}{liter}).

In this case:

  • number of moles= 0.0350
  • Volume=50 mL=0.05 L (1 L= 1,000 mL)

Replacing:

Molarity=\frac{0.0350 moles}{0.05 L}

Molarity= 0.7 \frac{moles}{liter}

<u><em>The molarity of a 50.0 mL solution that contains 0.0350 mol of sodium sulfate 0.7 </em></u>\frac{moles}{liter}<u><em></em></u>

3 0
3 years ago
Other questions:
  • Why do some objects float, while others sink?
    7·2 answers
  • How many oxygen atoms are in a representative particle of each substance?
    8·2 answers
  • Which chemical equation best represents the Law of Conservation of
    9·1 answer
  • Pure octane has a boiling point of 125.7 degrees Celsius but can be steam distilled with water at a temperature of 90 degrees Ce
    13·1 answer
  • Three samples of wood with the same volume were weighed. Sample A has a mass of 224.96 g, sample B has a mass of 0.55632 Ibs, an
    5·1 answer
  • Which of the following statements about hydrogen peroxide (H2O2) and water (H2O) correctly describe their properties?
    12·1 answer
  • True or false: elements are atoms or molecules that have a net charge
    9·1 answer
  • What is another factor that can influence osmosis?
    11·2 answers
  • Name the compound O2Cl6
    15·1 answer
  • Some hormones enter cells via
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!