CHEMISTRY HIGH SCHOOL

What holds solid sodium together?A. hydrogen bonding
B. metallic bonding
C. ionic bonding
D. dipole forces
E. van der Waals forces (London dispersion forces)

Answers

Answer 1
Answer: I'm pretty sure it's Metallic bonding

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What is the molality of a solution

Answers

Answer:

The formula for molality is m = moles of solute / kilograms of solvent. In problem solving involving molality, we sometimes need to use additional formulas to get to the final answer. One formula we need to be aware of is the formula for density, which is d = m / v, where d is density, m is mass and v is volume

Explanation:

it is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent. This contrasts with the definition of molarity which is based on a specified volume of solution.

What keeps the cell together and controls what goes into and out of the cell?

Answers

The membrane keeps the cell together and controls what goes in and out of the cell.

Which type of perspective makes objects look similar to how they look in real life (select the best answer)linear perspective

fractional perspective

isometric perspective

Answers

I believe it's fractional perspective

Answer:

The answer is linear Perspective

A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of X? A. 041 g. B. 80 g. C. 132 g. D. 574 g

Answers

The problem ask to calculate the value of x if an iron taht has a mass of 21.5g and has an initial temperature of 1000.0C is submerge in Xg of a water at 20C. So the value of X is letter C. 132 g. I hope you are satisfied with my answer and feel free to ask for more 

Answer:

D) yes, because (StartFraction b Over a + c EndFraction)(a + c) = b

Explanation:

just did it on edge 2020

How can biomass energy use improve water quality?

Answers

The use of biomass energy can improve water quality by the decrease in soil erosion and sedimentation. When we use energy from biomass, we certainly need biomass and we get most of this biomass from the wastes of crops therefore there is a need of planting more crops. By planting crops, soil erosion and sedimentation is decreased because plants hold the soil and prevent it from washing away with water.

In an ecosystem, the use of biomass energy can improve water quality by the decrease in soil erosion and sedimentation.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

Thus,to improve water quality by the decrease in soil erosion and sedimentation biomass energy is used.

Learn more about ecosystem,here:

brainly.com/question/31459119

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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.
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