The liquids hexane and water are placed in a test tube. The test tube is stoppered, shaken, and placed in a test tube rack. The liquids separateinto two distinct layers because hexane and water have different
(1) formula masses
(2) molecular polarities
(3) pH values
(4) specific heats

Answers

Answer 1

Answer:

Answer: option 2. molecular polarities

Explanation:

Answer 2

Answer:

The liquids hexane and water are placed in a test tube. The test tube is stoppered, shaken, and placed in a test tube rack. The liquids separate into two distinct layers because hexane and water have different molecular polarities. The answer is number 2.

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If a person looking at a poster sees green instead of yellow and doesn't see red at all, this person most likely has color blindness where _______ nerves fail to respond to light properly.

A lahar is a type of mudflow that occurs?A. after a volcanic eruption
B. before a hurricane make landfall.
C. after a severe thunderstorm
D. during a tornado

Answers

A lahar is a type of mudflow that occurs after a volcanic eruption. It is a sort of mudflow or trash stream made out of a slurry of pyroclastic material, rough flotsam and jetsam, and water. The material streams down from a fountain of liquid magma, normally along a waterway valley. Lahar is the most deadly by-products of the eruption because of the speed they can travel.

A lahar is a type of mud flow that occurs? The answer is, A. after a volcanic eruption.

Write a balanced chemical equation to show the reaction of naoh with the diprotic acid h2so4.

Answers

The balanced chemical equation that shows the reaction of NaOH with the diprotic acid H2SO4 is as follows:

2NaOH (aq) + H2SO4 (aq) → 2H2O (l) + Na2SO4 (aq)

BALANCEDCHEMICAL EQUATION:

A chemical equation involves the coming together of two or more substances called reactants to give rise to new substances called products.

According to this question, NaOH (sodium hydroxide) reacts with hydrogen sulphate (H2SO4) as represented in the chemical equation as follows:

NaOH (aq) + H2SO4 (aq) → H2O (l) + Na2SO4 (aq)

However, to balance the equation i.e. make the number of atoms of each element on both sides of the equation the same, we make use of coefficient 2 in front of NaOH and water.

2NaOH (aq) + H2SO4 (aq) → 2H2O (l) + Na2SO4 (aq)

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Answer:

$2NaOH +H_2SO_4 \rightarrow Na_2SO_4 + 2H_2O$

Explanation:

it is a acid base reaction and this reaction is known as neutralization reaction and this reaction is exothermic .

Balanced chemical reaction:

$2NaOH +H_2SO_4 \rightarrow Na_2SO_4 + 2H_2O$

Carbon monoxide (CO) reacts with hydrogen (H2) to form methane (CH4) and water (H20).CO(g) + 3H2(g) + CH4(g)+H20(9)
The reaction is at equilibrium at 1,000 K. The equilibrium constant of the reaction is 3.90. At equilibrium, the concentrations are as
follows.
[CO] = 0.30 M
[H2] = 0.10 M
[H20] = 0.020 M
What is the equilibrium concentration of CH, expressed in scientific notation?
0.0059
5.9 x 10-2
0.059
5.9 x 102

Answers

Answer: The equilibrium concentration of $CH_4$ , expressed in scientific notation is $5.9* 10^(-2)M$

Explanation:

Equilibrium constant is the ratio of the concentration of products to the concentration of reactants each term raised to its stochiometric coefficients.

The given balanced equilibrium reaction is,

$CO(g)+3H_2(g)\rightleftharpoons CH_4(g)+H_2O(g)$

At eqm. conc. (0.30) M (0.10) M (x) M (0.020) M

The expression for equilibrium constant for this reaction will be,

$K_c=([CH_4]* [H_2O])/([CO]* [H_2]^3)$

Now put all the given values in this expression, we get :

$3.90=(x* (0.020))/((0.30)* (0.10)^3)$

By solving the term 'x', we get :

x = 0.059 M= $5.9* 10^(-2)M$

Thus, the concentrations of $CH_4$ at equilibrium is :

Concentration of $CH_4$ = (x) M = $5.9* 10^(-2)M$

The equilibrium concentration of $CH_4$ , expressed in scientific notation is $5.9* 10^(-2)M$

Answer:B

Explanation:B

Seriously help please??Assuming all of the atoms attached to the central atom were identical, which of the following geometries would produce a nonpolar molecule? (Only 3 choices are correct.)

-linear
-trigonal planar
-tetrahedral
-trigonal bipyramidal
-octahedral
-bent (angular)

Answers

Covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.

What is chemical Compound?

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Using VSEPR and electron pair repulsion, we can easily find that linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule if we assume that all of the atoms attached to the central atom were identical. Any geometries which have center of symmetry will produce non polar molecule.

Therefore, linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.

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Using VSEPR and electron pair repulsion, we can easily find that:

linear
tetrahedral
trigonal planar

are all non polar molecules.

A student neutralized 16.4 milliliters of HCl by adding 12.7 milliliters of 0.620 M KOH. What was the molarity of the HCl acid?(1) 0.168 M (3) 0.620 M
(2) 0.480 M (4) 0.801 M

Answers

The molarity of the HCl acid is 0.480 M. The correct option is 2.

What is molarity?

Molarity is the division of the mass of the solution to the volume of the solution.

The formula that is used is

$\rm M_1V_1= M_1V_2$

Putting the values in the equation

0.620 * 12.7 = M1 * 16.4 = 0.480

Thus, the molarity of the HCl acid is 2). 0.480 M.

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Molarity is equal to the moles of solute over liters of solvent. In getting the molarity of HCl, you must know the formula for two solutions which is equal to M1V1 = M2V2. (16.4 milliliters of HCl)M1 = (12.7 milliliters) (0.620 M KOH) and you have 0.480M HCl. The answer is number 2.

Classify each of the following statements as an experiment, a hypothesis, a scientific law, an observation, or a theory. For example, Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide (N2O) or nitrogen monoxide (NO). Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product. In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure. In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules. By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions

Answers

Answer:

Classify each of the following statements as an experiment, a hypothesis, a scientific law, an observation, or a theory.

(1) For example, Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide (N2O) or nitrogen monoxide (NO). Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product.

(2) In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure.

(3) In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules.

(4) By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions

The correct answers to the question are as follows

(1) An experiment

(2) A scientific law

(3) A hypothesis

(4) A theory

Explanation:

(1) An experiment

A scientific experiment involves the development of procedures to verify an hypothesis

(2) A scientific law

A scientific law is a description or general rule to explain an observed phenomenon using a mathematical or verbal statement without attempting to provide an explanation

(3) A hypothesis

An hypothesis is an explanation of an observed phenomenon which can then be tested through the performance of experiments

(4) A theory

A theory in science is an explanation of naturally occurring phenomenon backed up by the results of experiments and observation

Final answer:

The given statements have been classified as experiment (1), observation (2), scientific law statement (3), hypothesis (4), and theory (5) respectively in the context of Chemistry.

Explanation:

1. Joseph Gay-Lussac reacted hydrogen and oxygen to produce water vapor, and he reacted nitrogen and oxygen to form either dinitrogen oxide or nitrogen monoxide: This is an experiment.

2. Gay-Lussac found that hydrogen and oxygen react in a 2:1 volume ratio and that nitrogen and oxygen can react in 2:1 or 1:1 volume ratios depending on the product: This is an observation.

3. In 1808, Gay-Lussac published a paper in which he stated that the relative volumes of gases in a chemical reaction are present in the ratio of small integers provided that all gases are measured at the same temperature and pressure: This is a statement of a scientific law.

4. In 1811, Amedeo Avogadro proposed that equal volumes of all gases measured at the same temperature and pressure contain the same number of molecules: This is a hypothesis.

5. By midcentury, Rudolf Clausius, James Clerk Maxwell, and others had developed a detailed rationalization of the behavior of gases in terms of molecular motions: This is a theory.