SCIENCE- The Periodic Table of elements
help help​

Answer:

2 KMnO4 + H2O2 → 2 MnO2 + 2 O2 + 2 KOH - Balanced equation

Answer:

Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound.

rate brainliest!

D

This is when very large or very small numbers must be written. They come in the format or 5.43 x 10^3 or can be written as 8.26E6. The numbers will vary depending on your number.

Answer:

B.) –197.8 kJ

Balanced equation : 2SO₂(g) + O₂(g) → 2SO₃(g)

Given:

================================================================

products energy = reactant energy

-593.6 + O₂ = -791.4

O₂ = -791.4 - ( -593.6)

O₂ = –197.8 kJ

Answer:

determiner is a word that introduces a noun or provides information about the quantity of a noun.

Explanation:

The metal cans are recyclable. (determiner before the adjective describing a plural noun to specify which cans)

Metal cans are recyclable. (no determiner because it's optional for plural nouns and noun phrases)

The statement that best describes the use of a chemical indicator in a titration is it must change color near the equivalence point.

Indicators are those compounds which are used in the titration process to estimate the presence of chemical entities in it.

In the titration process, indicator is added in the titration solution which changes its color when the reaction mixture goes towards the equivalence point and becomes disappear at that point.

Hence option (4) is correct.

To know more about indicators, visit the below link:
https://brainly.com/question/15817923

Answer:

mark brainliestbrainliestbrainliest.

Explanation:

The periodic table is an arrangement of the elements in order of increasing atomic number. Elements that exhibit similar chemistry appear in vertical columns called groups (numbered 1–18 from left to right); the seven horizontal rows are called periods.

Answer: Changes in the environment

Explanation: the rocks are subjected to extreme heat and pressure, volcanic activities or movements on the Earth's surface.

Answer:CAST!!!!!!!!!!!!!!!

Explanation:

Answer:

In a heavier nucleus, the repulsive force between the protons is very high. For stability, the nuclear force must dominate this electrostatic repulsive force. This is possible if the number of neutrons is greater than number of protons.

Answer:

are you to measures how much solute dissolved with the water or trying to measure how much more water you need the solute to dissolve in ?

The solute is a component of the solution that is added to a solvent to make a solution. when equilibrium is attained then the solution will be saturated.

A saturated solution is a solution that contains the maximum amount of dissolved solute particles in it and cannot further dissolve solutes added additionally.

When the solute is added and does not get dissolved then the equilibrium between dissolved and undissolved is reached and the solution becomes saturated.

Therefore, the solution is saturated.

Learn more about the saturated solution here:

https://brainly.com/question/1321288

#SPJ4

If the temperature of the O2 in the container rises as a result of being abandoned for quite some time, the pressure in the container will increase and this may either lead to an explosion or leakage of the gas.

At constant volume, the pressure of a gas increases with increased temperature as a result of an increase in the average kinetic energy of the gas molecules which increases the collision rate among the molecules.

Thus, if the temperature of a gas in a container increases, the pressure inside the container will also increase. This may lead to the gas leaking from the container or the container may even outrightly explode due to pressure.

More on temperature and pressure of gases can be found here: https://brainly.com/question/21846782

The condition is called phytoplankton because algae are microscopic, need sunlight and nutrient, water to survive.

Phytoplankton refers to microscopic marine algae and they are also called microalgae.They are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow. Most phytoplankton are very buoyant and float in the upper part of the ocean, where sunlight enter the water and they get the sunlight to produce food.

Algae photosynthesized,that is they use sunlight in the presence of chlorophyii and carbondioxide to produce food and oxygen.

Therefore, The condition is called phytoplankton because algae are microscopic, need sunlight and nutrient, water to survive.

Learn more about phytoplankton here.

https://brainly.com/question/18091244

Elecetronegativity will affect the replacement reactions as it attracts the bonded electrons towards itself.

Replacement reactions are those reactions in which replacement of any one element from any compound is done by any other element.

Electronegativity is the attracting power of any element to hold the bonded electron towards itself so that they will bear a partial negative charge on itself. If in any reaction replacement of anion is required and any compound have more electronegative element which bounded the bonded electron strictly and will not allow the formation of anion then it affects the activity of the reaction.

Hence electronegativity affect the replacement reactions.

To know more about electronegativity, visit the below link:
https://brainly.com/question/17762711

#SPJ4

Since iron is more reactive than copper, when steel wopl is placed in a solution of copper (II) sulfate solution into a small beaker, it dissolves and copper metal is produced.

A displacement reaction is one in which a more reactive element displaces another from its compound.

Reactive metals displace less reactive metals from their solutions.

Iron is a more reactive metal than copper and will displace copper from a solution of its salt.

Therefore, when steel wool is placed in a solution of copper (II) sulfate solution into a small beaker, the iron dissolves and copper metal is produced.

Learn more about displacement reactions at: https://brainly.com/question/14043577

Based on the volumes of HCl and NaOH reacted, the molarity of HCl is 0.3 M

A titration is a process in volumetric analysis in which the given volume of a substance of known concentration reacting with a volume another solution of unknown concentration is used to determine the unknown concentration of another solution

In the titration given, an unknown concentration of HCl reacts with 0.5 M NaOH solution.

The equation of the reaction is given below:

At equivalence point, 1 mole of HCl reacts with 1 moles of NaOH

moles of NaOH = 12.33 × 0.5 = 6.165 moles

moles of HCl = 19.54 × M

From above, moles of HCl = 6.165 moles

Molarity of HCl, M = 6.165/19.54

Molarity of HCl = 0.3 M

Therefore, the molarity of HCl is 0.3 M

Learn more about molarity at: https://brainly.com/question/17138838

Answer:

0.317

Explanation:

right on edge

The three step synthesis of the product from 1-methyl cyclohexane includes the addition of;

The three steps reaction involves the use of Reagannts such as;

Each step in the synthesis is arranged in the order:

Read more on three step synthesis;

https://brainly.com/question/14596275

Three step synthesis of the product from 1‑methylcyclohexene includes epoxide formation, nucleophilic attack and oxidation of -OH group.

Synthesis reactions are those reactions in which formation of new product takes place by the rearrangement or combination of reactant molecules.

Given question is incomplete so the complete pic of the question is attached below. In the given reaction reagents 1, 2 and 3 are used is C₆H₅CO₃H in CH₂Cl₂, C₆H₅Li in ether and PCC in CH₂Cl₂ respectively.

In the tree step synthesis process, in the first step formation of epoxide takes place, in the second step attack of nucleophile on epoxide takes place and finally in the third step oxidation of hydroxyl group to ketone group takes plce.

Hence 3 step synthesis includes epoxide formation, nucleophilic attack and oxidation of -OH group.

To know more about three step synthesis, visit the below link:

https://brainly.com/question/14596275

#SPJ4

Answer:

acidic,non polar,basic

Explanation:

that’s the ones I put and I got a 100% on my test just now

The types of R groups that can exist in amino acids include acidic, non-polar, basic, and polar groups.

1. Acidic R groups: These groups have a negative charge and can donate a proton (H+). An example of an amino acid with an acidic R group is aspartic acid (Asp) or glutamic acid (Glu).

2. Non-polar R groups: These groups are hydrophobic and do not have a charge. They are composed mainly of carbon and hydrogen atoms. Examples of amino acids with non-polar R groups include alanine (Ala), valine (Val), and phenylalanine (Phe).

3. Basic R groups: These groups have a positive charge and can accept a proton. An example of an amino acid with a basic R group is lysine (Lys) or arginine (Arg).

4. Polar R groups: These groups are hydrophilic and have a partial charge. They can form hydrogen bonds with other polar molecules. Examples of amino acids with polar R groups include serine (Ser), threonine (Thr), and asparagine (Asn).

Thus, types of R groups that can exist in amino acids include acidic, non-polar, basic, and polar groups.

Learn more about amino acids,here:

https://brainly.com/question/31872499

#SPJ4

A map that shows the location of volcanoes is called a Geologic Map. This kind of map contains information about the geological history and condition of volcanic sites.

Geologic maps indicate the following:

Note that the map specific to the question is unavailable hence the general response.

Learn more about geologic maps at:

https://brainly.com/question/2773541

All cell constituents are duplicated during cell division in a human cell i.e. mitosis and meiosis type of cell division.

During mitosis, a cell duplicates all of its internal parts and formed two identical daughter cells. During duplication, all parts have two sets which is equally distributed into two daughter cells in mitosis type of cell division.

While on the other hand, during meiosis, a cell divides into four daughter cells having haploid chromosomes i.e. half number of chromosomes.

So we can conclude that cell constituents are are duplicated during cell division in a human cell.

Learn more about cell division here: https://brainly.com/question/796780

Answer:

Helium, Neon, Argon, Krypton, Xenon, Radon, and Oganesson

Explanation:

they have full outer shells

The mass defect for the isotope thorium-234 if given mass is 234.04360 amu is 1.85864 amu.

Atomic mass (A) of any atom will be calculated as:

A = mass of protons + mass of neutrons

In the Thorium-234:

Number of protons = 90

Number of neutrons = 144

Mass of one proton = 1.00728 amu

Mass of one neutron = 1.00866 amu

Mass of thorium-234 = 90(1.00728) + 144(1.00866)

Mass of thorium-234 = 90.6552 + 145.24704 = 235.90224 amu

Given mass of thorium-234 = 234.04360 amu

Mass defect = 235.90224 - 234.04360 = 1.85864 amu

Hence required value is 1.85864 amu.

To know more about Atomic mass (A), visit the below link:

https://brainly.com/question/801533

Answer:

I won't say I'm confident with this because I'm not sure if the second one is even correct, but I hope I helped you and didn't make things worse lol.

Answer:

the answer is 11.2 seconds. I listened to the other person and picked 33.6 but that was wrong.

Explanation:

took test

Answer:

The growth of the plant

Explanation:

The growth of the plant from the bean soil is the dependent variable I believe. This is because it could change depending on many factors for e.g. the amount of light or water

Answer: 1 d. Wind Energy 2. a. Biomass Energy

Explanation:

The use of the moving air has been found to use wind energy, and the dead plants burning is formed with the biomass energy.

The energy has been given as the required form to perform a task. The energy can be generated with the pressure and the force of various matters.

Wind energy is produced with the use of the moving air and has been a clean form of energy, i.e. not pollute the region.

The biomass energy has been produced with the use of the dead plants and the matter and releases carbon dioxide.

Learn more about energy, here:
https://brainly.com/question/8630757

Answer: You used the Kelvin scale.

Explanation: this is because its multiplied by the temperature im not sure.