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
krek1111 [17]
3 years ago
10

What event started the universe

Chemistry
1 answer:
olya-2409 [2.1K]3 years ago
8 0
I believe the Big Bang
You might be interested in
A solution is a homogenous mixture of solute and solvent. There are different types of solutions. A carbonated drink is an examp
goblinko [34]

Answer:

  • A.) Gases are readily soluble in water at higher temperatures: FALSE
  • B.) Carbon dioxide gas will be less soluble in water when the partial pressure is low: TRUE
  • C.) Zinc sulfate is soluble in water: TRUE
  • D.) Propanol and heptane are miscible: FALSE
  • E.) Table salt dissolves in water to form a solution: TRUE

Explanation:

The answer choices are:

  • A.) Gases are readily soluble in water at higher temperatures.
  • B.) Carbon dioxide gas will be less soluble in water when the partial pressure is low.
  • C.) Zinc sulfate is soluble in water.
  • D.) Propanol and heptane are miscible.
  • E.) Table salt dissolves in water to form a solution.

<h2>Solution</h2>

Let's see every statement

<u><em>A.) Gases are readily soluble in water at higher temperatures.</em></u>

This is false. At higher temperature, the gas molecules will have higher kinetic energy, meaning that they will move faster and escape more easily from the liquid phase. Thus, gases are less soluble at higher temperatures.

<u><em>B.) Carbon dioxide gas will be less soluble in water when the partial pressure is low.</em></u>

This is TRUE.

HIgher pressures "push" the gas molecules into the liquid phase. When more molecules get dissolved the pressure is partially relieved.

This relation is stated by Henry's Law: the solubility of gases in liquids is directly proportional to the pressure of the gases above the surface of the solution. Thus, carbon dioxide will me less soluble in water when the pressure is low.

<u><em>C.) Zinc sulfate is soluble in water.</em></u>

This is TRUE.

You must resort to the rules of solubility or search the properties of this salt.

Th solubility rules state that most sulfates are soluble in water. Exceptions are sulfates of Ag⁺,Ca²⁺, Sr²⁺, Ba²⁺, Hg²⁺, and Pb²⁺. Thus, you can expect that zinc sulfate is soluble in water.

<u><em>D.) Propanol and heptane are miscible.</em></u>

This is false.

Propanol is a polar compound. It is miscible with water because water is polar too. Heptane is not polar. Thus, following the rule that "like dissolves like" propanol and heptane are not miscible.

<u><em></em></u>

<u><em>E.) Table salt dissolves in water to form a solution.</em></u>

This is TRUE.

This is a classical example of an ionic compound (sodium chloride) that is soluble in water (a polar solvent), showing the rule that polar solvents dissolve polar and ionic compounds.

It is also an everyday fact: rice, for instance, absorbs salt from water because the salt is dissolved in the water.

3 0
3 years ago
An aqueous HCL solution has a proton concentration equal to 6.00 mol/L. The HCL concentration in this solution is ————M.
Harman [31]

Answer:

HCl conc.= 6.0mol/L

Explanation:

From the dissociation of HCl= 1 mole H+ and 1mol Cl-, which is equivalent stoichiometrically in concentration to that of 1 mol HCl,

4 0
3 years ago
which of the following cannot be considered a single phase? a) a pure solid b) a pure liquid c) a homogeneous mixture d) a heter
Trava [24]
The question is asking to choose among the following choices is cannot be considered as a single phase and base on my further research and understanding about the sad topic, I would say that the answer would be <span>d) a heterogeneous mixture. I hope you are satisfied with my answer </span>
8 0
3 years ago
Can someone please help me with this? I would appreciate it.
Luba_88 [7]

Answer: State

Explanation:

The rock on the left is more shiny than the right, so that’s incorrect.

The rocks are not the same color, so that’s also incorrect.

Even though you can’t feel the textures, the right rock looks grainy and the left on doesn’t.

They both are solid, so that is the correct answer.

6 0
3 years ago
Balance the following equation: __Ch4+__O2→__CO2+__H2O​
konstantin123 [22]

Answer:

1,2,1,2

Explanation:

You would need only one of the CH4 but 2 of the O2 then 1 CO2 and 2 H2O on each side of the equation you now have 1 carbon, 4 hydrogen, and 4 oxygen.

3 0
2 years ago
Other questions:
  • What is the definition of a gas
    15·2 answers
  • How is mass described?
    10·1 answer
  • What is a reaction called that has heat as a product (gives off heat)?
    7·2 answers
  • How does the density of ice compare with that of liquid water? What evidence can you cite to support your answer?
    7·1 answer
  • If the chemical X-gal is added to nutrient agar, lactose fermenting colonies turn blue, while non-fermenting colonies appear whi
    7·1 answer
  • The properties of several unknown solids were measured. Solid Melting point Other properties A &gt;1000 °C does not conduct elec
    14·2 answers
  • Click in the answer box to activate the palette. List the following molecules in order of increasing dipole moment: H2O, CBr4, H
    13·1 answer
  • How much water should be added to 80 grams of common salt so as to obtain 20% salt solution​
    11·1 answer
  • What type of bonds are formed between silicon(Si) and oxygen(O) in silicon dioxide (SiO2), a commonly component of sand?
    12·1 answer
  • The elements of the group IA are termed as alkali metals, because their ___ are alkaline.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!