Chemistry High School

If A is the symbol for an element, which of the following is an isotope of 15
7 A?

Is A correct ??

If A Is The Symbol For An Element, Which Of The Following Is An Isotope Of 15 7 A?Is A Correct ??

Answers

Answer 1

Answer: No It's B

Explanation:

13 = 7 so 15 = ? b because 7 + 8 = 15

Related Questions

The moon stays in orbit around the Earth because of the Earth's

Answers

Answer:

Gravity

Explanation:

I need help with this question. Thank you!

Answers

Answer:

J. All of these

Explanation:

I hope it helps.

I think it would be "all of the above" because all the things the wild hogs do are impacting all of the answers stated there.

hope that helped!!

Unknown elements W and X formed the compound image during a reaction. If element W has one valence electron, element X most likely has how many valence electrons

Answers

Answer:

I can't see the compound image but the safe guess here is that there is now noble gas config for the molecule so likely X has 7 valence electrons kind of like Na being W and Cl being X

Explanation:

Which of the following is NOT a clue that could indicate a chemical change?

A. Change in color
B. Mixing of reactants
C. Change in energy
D. Release of a gas
E. Formation of a precipitate

Answers

Answer:

i think its C, but im not 100% sure. if not c, then D, but C sounds more right.

Explanation:

everything else sounds like sure fire sighs of a chem change. good luck

7. Which element in period 5 has properties similar to barium?

Answers

Mg has similar properties to barium

Your friend is describing an element that is commonly
found in household materials, malleable, and a good
conductor of heat and electricity. They say it is not very
reactive and is very similar to the other elements in its
group. Your friend's element is most likely which of these?
A. A transition metal
B. A noble gas
C. A halogen
D. An alkali metal

Answers

D. An alkali metal
yeah hope this helps

An element that is commonly found in household materials, malleable, and a good conductor of heat and electricity. They say it is not very reactive and is very similar to the other elements in its group as an alkali metal.

What is an alkali metal ?

All the elements listed in column 1A of the periodic table—hydrogen, lithium, sodium, potassium, rubidium, cesium, and francium—are classified as alkali metals. The fact that all of these metals contain one electron in their outermost layer of electrons binds them together.

The production of paper, detergents, and soap all need sodium hydroxide. In addition to being used as the electrolyte in alkaline, Ni-Cd, and Ni-MH batteries, potassium hydroxide is also used by farmers to make acidic soil more alkaline so that plants would grow better in it.

Vinegar, hydrochloric acid, and sulfuric acid are a few examples of the H = ion-containing compounds referred to as acids. Alkalis are a class of substances that feel soapy and contain the OH = ion.

Thus, option D is correct.

To learn more about an alkali metal, follow the link;

https://brainly.com/question/18153051

#SPJ5

Ammonia (NH3) is produced in the human body as a waste product during the digestion of protein. How many moles of N2 will be needed to produce 87.00 grams of NH3?

N2 + 3 H2 ® 2 NH3

Answers

Answer:

43.5

Explanation:

there are 43.5 moles of N2

How many moles are in 35.5 grams of NaNO3?

Answers

1 mole is equal to 1 moles NaNO3, or 84.99467 grams.

Which is the best explanation of why heat is released when
wood burns?

Select one:

A. Burning releases energy stored in chemical bonds.

B. Burning creates energy by increasing particle motion.

C. Burning destroys matter and creates energy from it.

D. Burning causes convection currents which create heat energy.

Answers

The answers is A. Reales energy stored in chemical bonds

Which of the following represents a polar covalent compound?
O2
CI2
NaCI
H2O

Answers

C) NaCl


~ Hope this helps!

(C.NaCl

it is the correct answer because this compound likes colder weather.

why does decane have a higher boiling point than acetone

Answers

Octane has stronger London dispersion forces than ethane

How can scientists use stoichiometry to ensure that commercial products contain the components that manufacturers claim they do?

Answers

Answer:

I know you have been waiting awhile for this question to be answered :)

Stoichiometry is used in industry quite often to determine the amount of materials required to produce the desired amount of products in a given useful equation. Each one of these products requires stoichiometry. There would be no products from these industries without chemical stoichiometry.

Explanation:

Hopefully this helps :D

Sorry you had to wait so long :(

Calculate the mass in grams of each sample.

4.68×1020 H2O2 molecules

Answers

24= y2k* - 2x H202 grams in mass

All three types of worms that undergo asexual reproduction use which process?
binary fission
budding
fragmentation
spore formation

Answers

Answer:

binary fission

Explanation:

i just took the quiz

A farmer is breeding his best livestock is and example of?

Answers

Answer:

This is an example of selective breeding

what are buffers and why are they important

Answers

Explanation:

A buffer is a solution that can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base,thus maintaining the pH of the solution relatively stable.This is important for processes and/or reactions which require specific and stable pH ranges.

I hope it's helpful!

Help! The question is in the picture

Answers

Answer:

little l big l big l little l

Explanation:

can you help me Complete the following sentence: After we explained why we needed her in the play, she and joined our rehearsal A quaffed B. acquiesced C vengeance D. wreaked

PLEASE HELP ME ASAP

Which of the following is an example of an opposing force?
A
Gravity pulling a ball down a hill
B
Wind blowing a leaf off of a tree
с
Gravity holding a rock still on the ground
D
Water pushing against someone as they wade through a pool

Answers

Answer:

D.

Explanation:

Water pushing against someone as they wade through a pool is an opposing force.

D the water pushing against

Which law represents a balanced chemical reaction?

A. Avogadro‘s hypothesis
B. Ideal gas law
C. Newton’s 1st law of motion
D. Newton’s second law of motion
E.Law of conservation of mass

Answers

E: Conservation of Mass

Answer:

E.Law of conservation of mass

Explanation:

John decided to cycle to his friend’s house at a speed of 28 km/h and the journey took 2 hours. How far did John cycle?

Answers

Answer:

THE ANSWER IS 56 :)))

Match The hydrocarbon names and structural formulas

Answers

The one in the middle is 2-butyne. I know that because it ends in YNE, which means there’s a triple bond.

The first one is 2-methylbutane. It ends in ANE. Therefore one bond.

The third one is 2-butene. ENE like double bond.

ANE= single bond
ENE= double bond
YNE = triple bond

What do many employers require of respiratory technician? Check all that apply.

-Basic life support certification
-A specialized respiratory certification
-A four year medical degree
-Certification from the national board of respiratory care
-Socialize training in pediatrics or geriatrics

Answers

Answer:

1 & 4

Explanation:

just got it right on edge

Round off 35.65 to three significant figures.


help

Answers

The answer is B 35.7

What is the formula of a compound that has [1 mol Fe], [1 mol Ti], and [3 mol O]

Answers

Answer: [tex]FeTiO_3[/tex]

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

The molecular formula for a compound that has [1 mol Fe], [1 mol Ti], and [3 mol O] will be [tex]FeTiO_3[/tex]

i’m stup!d. plz help:(

Answers

Answer:

Its Polar bby

Explanation:

Answer:

polar

Explanation:

Which is an example of a constructive force?

Answers

Answer:

Volcanic eruptions is an example of a constructive force i believe.

Answer: Sediment, Techtonic plates, Crust deformation, and Volcanoes

Explanation:

Sediment (Deltas, sand dunes, etc.)

Tectonic Plates Colliding (Mountains)

Crust deformation (Folding or Faulting)

Volcanoes (makes Islands)

What is the ratio of the effusion rate of the helium to methane? (round to hundreds)

Answers

Answer:

2.00

Explanation:

From Graham's law; the rate of effusion is inversely proportional to the square root of the relative molecular mass.

Let the rate of effusion of Helium be R1

Let the rate of effusion of Methane be R2

Let the molecular mass of Helium be M1

Let the molecular mass of Methane be M2

Hence;

R1/R2 = √M2/M1

R1/R2 = √16.0294/4.0026

R1/R2 = 2.00

Which cell type is represented by number 1?

Answers


where is the graph i need it to answer haha put the graph then i will answer

Why are large differences in temperature between the wet bulb and dry bulb thermometers are possible only at higher temperatures?

Answers

Answer:

At constant vapor pressure, the relative humidity decreases as the temperature increases, therefore, at higher temperature the relative humidity is low and water readily evaporates from the wet bulb thermometer that results in the cooling of the bulb such that at a given ambient temperature the very low relative humidity results in very large differences between the temperatures of the wet bulb thermometer and that of the dry bulb thermometer and the wet bulb is observed to be the colder thermometer of the two

Explanation:

Animal and plant organs are organized into organ stystems much like organize your homework in

Answers

Answer:

classes

Explanation:

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