CHEMISTRY HIGH SCHOOL

3 During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms(1) are lost by the atoms
(2) are gained by the atoms
(3) return to lower energy states within the atoms
(4) move to higher energy states within the atoms

Answers

Answer 1

Answer:

Answer:

The correct answer is (3).
Return to lower energy states within the atoms

Explanation:

When an atom absorbed a specific energy, the electron move from lower energy state to higher energy state known as excited energy state. After sometime, the excited state electron come back to lower energy orbital (Ground state) with emission of light as in this case of lithium, red light is emitted.

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NEED HELP ASAP 30 POINTS!!!Label the parts of this atom

Match the landform to its description.caldera
made of pieces of lava
volcanic soil
material fills in valleys
cinder cone
bowl-shaped depression
shield volcano
wide summit, gentle slope
lava plateau
rich in nutrients

Answers

Answer:

cinder cone: made of pieces of lava

shield volcano: wide summit, gentle slope

volcanic soil: rich in nutrients

caldera: bowl shaped depression

lava plateau: material fills in valleys

Explanation:

it’s right

Answer:

Caldera, Bowl-Shaped depression

Shield volcano, Wide summit, Gentle slope

Lava plateau, Material fills in valleys

Volcanic soil, Rich nutrients

Cinder Cone, Made of pieces of lava

Explanation:

Got it right on edge

What subatomic particles have a charge? (pick all that apply)Protons
Neutrons
Electrons

Answers

Answer:

Protons- positive

Electrons - negative

Explanation:

What is the molar mass of ph

Answers

30.973762 u ± 0.000002 u Hope this Helps >>

Suggest two ways to liquefy the gases.

Answers

There are two ways to liquefy a gas:

-- Increase the pressure on it.

-- Lower its temperature.

The liquefication is faster and easier if you do both.

Charlie is balancing an equation. She has identified the atoms and counted the number of each in the reactants and products. What would Charlie adjust to make the number of atoms in the reactants the same as the number of atoms in the products?

Answers

Answer: Stochiometric coefficients

Explanation: The chemical equations must be balanced to follow the law of conservation of mass which says that the mass of products must be same as the mass of reactants.

$CH_4+O_2\rightarrow CO_2+H_2O$

This is a skeletal equation and needs to be balanced by adjusting the stochiometric coefficients. In order to keep the mass same, the number of atoms must be same on both sides.

$CH_4+2O_2\rightarrow CO_2+2H_2O$

Answer:

The stoichiometric coefficients.

Explanation:

Hello,

Chemical reactions are widely generalized by the following chemical equation:

$aA+bB-->cC+dD$

Capitalized letters are referred to both the reacting and produced species during the chemical reaction meanwhile the lowered case letters are referred to the stoichiometric coefficients which balance the chemical reaction. Balancing means that the number of atoms in the reagents must be equal to the number of atoms in the products, this is exemplified via the following balanced chemical reaction:

$2HCl+Ca(OH)_2-->CaCl_2+2H_2O$

The coefficient 2 in the hydrochloric acid is set due to the produced calcium chloride which has two chlorine atoms in order to equal them.

Best regards.

Which role of water is significant for most living things in a biological system?a. It prevents many life processes from occurring.b. It slows down the transportation of nutrients.c. It provides temperature regulation.d. It does not freeze in cells at very cold temperatures.

Answers

I am pretty sure the correct answer is C. Water has large heat capacity meaning it can absorb a lot of energy before changing temperature. That helps the body regulate heat since it can be exposed to different environments and experience small temperature changes.

I hope this helps. Let me know if anything is unclear.

Answer:

The answer is C!

Explanation:

I took the test ;)

Other Questions

Which group tends to have the highest ionization energy? The lowest?a) Halogens; Alkaline earth metalsb) Alkali metals; Noble gasesc) Noble gases; Alkali metals

The reaction below demonstrates which characteristic of a base?CuSO4(aq)+2NaOH(aq)->Cu(OH)2(s)+Na2SO4the ability of bases to release sodium ions into solutionthe ability of bases to release hydrogen ions into solutionthe ability of a base to react with carbonate or bicarbonatethe ability of a base to react with a soluble metal salt

Find the number of moles of argon in 452 g of argon

A food product claiming to be sugar free containsA. less than 10 grams of sugar per serving. B. less than 0.5 grams of sugar per serving. C. less than 5 milligrams of sugar per serving. D. less than 2 milligrams of sugar per serving.