What is the result of multiplying 2.55 x 10^10 m x 3.5 x 10^-7m using proper significant figures and scientific notation.1. 8.925 x 10^2 m^2
2. 8.92 x 10^1 m^2
3. 8.92 x 10^2
4. 8.9 x 10^3 m^2

Answers

Answer 1

Answer: 3 I think I’m sure much love

Related Questions

Put the elements potassium iron bromine and krypton in order of increasing electro negativity
According to the law of conservation of energy, the energy released by the system must be transferred to and absorbed by the surroundings
The standard unit for density is g/cm3 or g/mL.
A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? The gas undergoes a phase change. The velocity of the gas particles decreases. The kinetic energy of the particles increases. An exothermic reaction is more likely to occur.
Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium?1.)oxygen + lithium oxide to lithium2.)lithium + oxygen to lithium oxide3.)oxygen + lithium to lithium + oxide4.)lithium oxide to lithium + oxygen

Which best describes emerging scientific ideas?

Answers

Answer : Not studied by many scientists.

Explanation : An emerging scientific idea should be something which is not commonly studied by most of the scientists. If it is found to be common with many scientific ideas then it may not be considered as emerging scientific idea. It has to be unique, different and innovative from rest of the ideas.

How many additional electrons can fit into the n = 3 shell of sulfur ?

Answers

TWO more additional electron can fit into that....

In each reaction box, place the best reagent and conditions from the list below.

Answers

This is a two step step reaction as shown below,

Step 1:
Epoxidation of Alkene:
In first step Cyclohexene is treated with peroxybenzoic acid in the presence of Dichloromethane which results in the formation of epoxide moiety.

Step 2:
Nucleophillic Substitution Reaction:
In second step the epoxide formed is treated with Sodium Methoxide which acts as a nucleophile and attacks the less hindered carbon of epoxide resulting in the formation of final product as shown below.

Final answer:

The best reagent and condition for a chemical reaction is dictated by the reactants at hand and the substance that you're trying to produce. For instance, to convert an alkene into an alcohol, Osmium Tetroxide (OsO4) at room temperature would be an example of an ideal reagent and condition.

Explanation:

In chemistry, when you are asked to place the best reagent and conditions in a reaction box, you are trying to predict the proper chemical, heat, or pressure conditions that will foster a certain chemical reaction. This requires understanding of substances' chemical properties, behavior under different conditions, and reaction mechanisms. For instance, if we want to oxidize an alkene into an alcohol, we would choose a reagent like Osmium Tetroxide (OsO4). In this case, OsO4 would be our 'best reagent', and room temperature may serve as the ideal condition as it generally facilitates this process. Each reagent and condition depend on the reactants you start with and the product you want at the end.

Learn more about Chemical Reactions here:

brainly.com/question/34137415

#SPJ6

The basic points in Lewis and Langmuir theory of electrovalency

Answers

The correct answer for the question that is being presented above is this one: "Electrovalency is characterized with the transferring of one or more electrons from one atom to another together with the formation of ions and as well as the number of positive and negative charges.

The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds.

Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas

The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.

A mixture of sand and table salt can be separated by filtration because the substances in the mixture differ in( I) boiling point (2) density at STP(3) freezing point (4) solubility in water

Answers

A mixture of sand and table salt can be separated by filtration because the substances in the mixture differ in solubility in water. Thus, the correct option for this question is D.

What is meant by Solubility?

Solubility may be defined as the phenomenon in chemistry that involves the maximum amount of a substance that will significantly be disbanded in a given amount of solvent at a particular temperature.

The answer to the above question is better understood by the fact that when you mix both salt and sand in the water, you may find that salt is completely soluble in water while sand is not. This is because the bond of water is not competent enough to dissolve the sand.

Therefore, the correct option for this question is D.

To learn more about Solubility, refer to the link:

brainly.com/question/23946616

#SPJ2

The answer is (4) solubility in water. When you put the mixture into water, the salt will dissolve and sand will not. The you can separated them by filtration will solution can pass through and sand will be left.

The concentration of gallium in silicon is 5.0 × 10−7 at%. What is the concentration in kilograms of gallium per cubic meter?

Answers

The concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.

To determine the concentration of gallium in kilograms per cubic meter, we need to convert the concentration from atomic percent (at%) to kilograms per cubic meter.

The atomic fraction is the ratio of the number of gallium atoms to the total number of atoms in the silicon-gallium mixture.

We need to know the atomic masses of gallium and silicon. The atomic mass of gallium is 69.72 g/mol, and the atomic mass of silicon is 28.09 g/mol.

The atomic fraction of gallium can be calculated using the formula:

Atomic fraction of gallium = (Concentration of gallium in at%) / (Atomic mass of gallium) / [(Concentration of gallium in at%) / (Atomic mass of gallium) + (Concentration of silicon in at%) / (Atomic mass of silicon)]

Plugging in the given values:

Atomic fraction of gallium = ( $5.0 * 10^(-7)$ %) / (69.72 g/mol) / [( $5.0 * 10^(-7)$ at%) / (69.72 g/mol) + (100 - $5.0 * 10^(-7)$ ) at% / (28.09 g/mol)]

Now, let's convert the atomic fraction to the number of gallium atoms per cubic meter. We can use Avogadro's number, to make this conversion.

Number of gallium atoms per cubic meter = Atomic fraction of gallium × Avogadro's number.

Mass of gallium per cubic meter = Number of gallium atoms per cubic meter × (Atomic mass of gallium / 1000)

Therefore, the concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.

Learn more about Concentration here;

brainly.com/question/30862855

#SPJ12

Final answer:

The concentration of gallium in kilograms per cubic meter can be calculated using the atomic mass of gallium and Avogadro's number.

Explanation:

To calculate the concentration of gallium in kilograms per cubic meter, we can use the atomic mass of gallium and Avogadro's number. The concentration in kilograms per cubic meter can be found using the formula:

Concentration (kg/m³) = Concentration (% by mass) x Density (g/cm³) x Atomic Mass (g/mol) / 1000 x Avogadro's Number

First, convert the concentration from at% (atomic percent) to % by mass. Since gallium has an atomic mass of 69.7 g/mol, we can use this value to find the concentration in kilograms per cubic meter.