Directions are in the picture

Answer:

I believe it is B

Explanation:

hope it helps. please let me know if it's wrong

Answer:

the products which is formed in the given reaction is MgO ( magnesium oxide )

Explanation:

when magnesium metal reacts with oxygen present in air it burns with a white dazzling flame

to form white powder of magnesium oxide (MgO)

here's the balanced chemical reaction for it

2Mg+O2->2MgO

Answer:  B. Nickel Copper Zinc

Explanation:

Dobereiner's triads was a group of three elements. Dobereiner said that the relative atomic mass of the middle element in each triad was average of the relative atomic masses of the other two elements.

Thus if A, B and C forms Dobereiner's triads, the mass of B is average of mass of A and C.

A. Hydrogen Oxygen Nitrogen:

mass of oxygen = 15.999

mass of oxygen according to Dobereiner = [tex]\frac{1.008+14.007}{2}=7.5075[/tex]

B. Nickel Copper Zinc

mass of copper = 63.5

mass of copper according to Dobereiner = [tex]\frac{58.7+65.38}{2}=62.04[/tex]

C. Aluminum Gallium Indium

mass of gallium = 69.72

mass of gallium according to Dobereiner = [tex]\frac{26.98+114.82}{2}=84.39[/tex]

D. Neptunium Plutonium Americium

mass of Plutonium = 244

mass of Plutonium according to Dobereiner = [tex]\frac{243+237.04}{2}=240.02[/tex]

Answer:

100% of the energy entering earth's atmosphere comes from the sun. ~50% of the incoming energy is absorbed by the earth's surface i.e. the land and oceans. ~30% is directly reflected back to space by clouds, the earth's surface and different gases and particles in the atmosphere (the earth's albedo is 0.3 on average)

Explanation:

:)

Answer:

can you give me more clearence on what is going on

Explanation:

Answer:

the science that deals with the properties, composition, and structure of substances they undergo, and the energy that is released or absorbed during these processes.

Explanation:

Answer:

Is the scientific branch that deals with the composition and decomposition of elements and compounds in nature

Answer:

All of them have a nucleus..

Explanation:

Pretty simple stuff.  There's no cell without one.

Carlita’s body is made up of many cells. The one thing that all her cells have in common is they have the same kind of genes.

Genes are tiny pieces of spherical hereditary material that are bead-shaped and found on chromosomes. They hold the organism's genetic makeup. The number of genes on each chromosome is incalculable.

The hereditary material that makes up chromosomes is arranged in x shapes inside the nucleus. DNA, genes, and proteins make it up. An organism's genotype is distinct from other organisms because of its distinct genetic makeup, and this distinction can be passed down from one generation to the next.

Traits may be influenced by genes, the environment, or a mixture of the two. Quantitative features can also be qualitative, such as eye colour (such as height or blood pressure).

Therefore, numerous cells make up Carlita's body. Her cells all share the same type of genes, which is the only thing that unites them.

To learn more about genes, refer to the link:

https://brainly.com/question/8046559

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Answer:

when there is high pressure and low temperature then the solubility of a gas will be greatest.

Answer:

B

Explanation:

edg 2021

Answer:  There are many properties of a metal which is taken into consideration when it is used for construction

Explanation:

The properties can be physical, chemical, et cetera. The physical properties that is considered are:

1. Durability:  It can be defined as the property of the material to withstand the atmospheric pressure and other factors.

2. Density: The ratio of mass by volume of a material (homogeneous material) is called as density.

3. Fire resistance: The ability of the material to withstand in fire without changing its size or shape.

4. Weather resistance: The ability of the material to withstand the weather which could be variable round the year.

5.Water absorption: The ability of the material to absorb water and retain it.

Answer:

the rate of heat transfer is directly proportional to the mass flow rate.

Explanation:

There is an elementary equation from basic thermodynamics that states that the rate of heat transfer (Q) equals the mass flow rate (M) times a Constant (the specific heat of water) times the Delta T (fluid temp out minus fluid temp in): Q = M x C x Delta T In other words, the rate of heat transfer is directly proportional to the mass flow rate.

Answer:

calcium supplements

Explanation:

Answer: [tex]2Al(OH)_3+3H_2CO_3\rightarrow Al_2(CO_3)_3+6H_2O[/tex]

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants.

The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation will be :

[tex]2Al(OH)_3+3H_2CO_3\rightarrow Al_2(CO_3)_3+6H_2O[/tex]

Answer:

(6.3x10^23)/(6.02x10^23) = 1.047 mol Cl

The number of moles of the chlorine atoms in the 6.022 × 10²³ molecules of chlorine is equal to 2.10 mol.

Avogadro’s number can be used to express the number of entities in one mole of any substance and these units can be atoms, molecules, ions, electrons, or protons, depending upon the kind of chemical reaction or reactant and product.

The Avogadro’s constant has a numerical value approximately equal to 6.022× 10²³ mol⁻¹.

Given, the number of molecules of chlorine = 6.3× 10²³

As the one chlorine mole has chlorine atoms = 2

The number of moles of chlorine molecules in 6.3× 10²³ will be :

= 6.3× 10²³/ 6.022× 10²³ = 1.05 moles

One mole of chlorine molecules has Cl atoms = 2 moles

1.05 moles of chlorine molecules have Cl atoms = 2 × 1.05 = 2.10 mol

Therefore, the number of moles of Chlorine atoms is equal to 2.10.

Learn more about Avogadro's number, here:

brainly.com/question/11907018

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Just say that it went below 0/average.

Answer:

the answer is c

Explanation: since i helped can i have brainlist

Answer:

C. the lungs where it picks up oxygen again

Answer:

Well, acutally it shouldnt..but why it should be recycled is because 1. you can use it for many nessactities such as cars and blades, and bikes

You should also recycle it for, scrap parts! so just in  case if you need recycled steel ya know where to get it

Lastly, you should recycle steel because of its value. If you recycle steel then melt it, and make well i dont know, a blade out it, you might have just made something, and then think, "Well that was fun and easy, i wanna use more recycled items to build or forge things

Explanation:

Hope this helps and pls mark brainlest!

Answer:

i think because its cause pollution

Explanation:

when making steel a lot of pollution goes in the atmosphere so if you recyle the the steel we may less pollution [ im only 12 so im sorry if this was wrong]

Answer:

3

Explanation:

2+2=4-1=3 quick maths

Condensation is the phase change from gas to a liquid, whereas evaporation is the phase change from liquid to gas.

Answer:

Boron

Explanation:

Hope that helps

Answer:

Boron.

Explanation:

2 energy shells

1st energy she'll 2 electrons

2nd energy shell 3 electrons

Answer:

Ca2+ is cation

Explanation:

Because cation contain positive charge.

Answer: 70.0°C

Explanation:

Quantity of heat = Mass * Specific heat * Change in temperature

Quantity of heat = 104.6 KJ

Mass = 500.0 g

Specific heat of water is 4.18 J/g°C

Change in temperature assuming final temperature is x = x - 20

Units should be in grams and joules:

104,600 = 500 * 4.18 * (x - 20)

104,600 = 2,090 * (x - 20)

x - 20 = 104,600/2,090

x = 104,600/2,090 + 20

x = 69.8

= 70.0°C

where it was formed and. conditions it was formed under

Answer:

nobel gases ,non metals and metaliods

Which statement about photosynthesis is FALSE?

Answer:

b. Oxygen is needed as a reactant to produce

glucose is the incorrect statement here

Explanation:

plants uses simple raw materials to prepare their food , which includes water ( H2O ) and Carbon dioxide ( CO2 ).

and traps sunlight by Green pigments known as chlorophyll and stores these energy in bonds of glucose molecules

so ,

after this reaction glucose and oxygen is formed as products

● hence we conclude that Oxygen is not needed as a reactant to produce glucose , oxygen is the bi product formed during photosynthesis.

Answer:

I believe it is E because the battery has a wire, a power source(the battery), and a bulb connected together thus making a full series circuit. Furthermore, the more batteries they are to a series circuit, the more dimmer the light bulbs will be.