Chemistry High School

Help pleasee I need help to write the formulas i’m so lost

Answers

Answer 1

Answer:

NH4

Explanation:

Related Questions

Identify the number of electrons

Atomic mass: 24

Atomic number: 12

-2 charge

Answers

Answer:

24 is the answer of this question

Atomic number given is 12 is Mg magnesium

Protons and electrons are equal if element has not become an ion. 12 protons +, and 12 negative electrons= atomic number of 12

Charge of -2 means there are:
/////. 14 negative electrons

Classify each organic compound based on the functional group it contains.
ether
carboxylic acid
ester
alcohol
Molecular Structure
Type of Compound
I-O-I
Η Ο
1 10
C-C-0-H
1
H
H
-I
H
II
H
1
H-C
1
H
H
1
-C
1
H
1
H
1
H
1
H
H
I
H-C
1
H
H H
I
C-0-C-H
1
1
H H
1
H-CC-O-H
1
H H

Answers

Answer:

H2C2O1

Explanation:

Answer:

Carboxylic Acid

Ester

Ether

Alcohol

Explanation:

The diagram below shows the distance traveled by two light waves in 1 second.

Based on the diagram, which of these conclusions is correct?

The frequency of Wave 1 is double the frequency of Wave 2.
The frequency of Wave 2 is double the frequency of Wave 1.
The wavelength of Wave 1 is four times the wavelength of Wave 2.
The wavelength of Wave 2 is four times the wavelength of Wave 1.
Please help

Answers

Answer:

The frequency of Wave 2 is double the frequency of Wave 1.

Explanation:

Waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths.

The breaking and forming of bonds between atoms in substances results in changes in the _______ contained in the substances.

Answers

Answer:

Electrons

Explanation:

The breaking and forming of bonds between atoms in substances results in changes in the number of electrons in the substance.

Atoms combined in order to share, gain or lose electrons for it to be stable. The noble gases have a set up configuration which makes them stable. All atom tend to mimic the noble gases.

Which molecule has the strongest forces of attraction between molecules?

Answers

Dipole-dipole interactions are the strongest intermolecular pressure of attraction.

Answer: Dipole-dipole interactions are the strongest intermolecular force of attraction.

Explanation:

HELPP!!! ASAP!!!! BRAINLIEST!!!

Complete the following sentences. Energy is required to _______ bonds in a molecule and released when bonds are _______.

Answers

Answer:

Energy is required to break bonds in a molecule and released when bonds are made.

Explanation:

Energy is added to break bonds and released when making bonds.

When determining an element’s chemical properties, the most important subatomic particle to look at is

Answers

Answer:

Electrons

Explanation:

When determining the chemical properties of elements, the most important subatomic particle to consider is the electrons.

Electrons are negatively charged particles that orbits an atom. They occupy the extranuclear space of an atom.

These electrons determines the chemical properties of each atom. Most especially, the valence ones. All elements wants to resemble the noble gases, so they alter their number of electrons in order to attain this stable state.

Is copper sulphate malleable?

Answers

Answer:

Yes, Copper (Cu) in its pure form is a reddish-brown metallic element with high ductility and malleability that is an excellent conductor of heat and electricity: atomic weight 63.54; atomic number 29; density 8.94 g/cm3; melting point 1083°C; and boiling point 2595°C.

Answer:

no ,its not malleable

Explanation:

copper II sulphate is a blue compound , which is brittle solid , crystalline .

copper metal is malleable and ductile

Which of the following are soluble in water: salt, gravel, or pepper

Answers

i would say gravel but i’m not sure

gravel hope this helps!!!!!

PLEASE HELP!!!!! NEED HELP ASAP!!!!!

Write the chemical formula for the ionic compounds below
EXAMPLE- Calcium Phosphide= Ca3P2

Magnesium chloride=
Aluminum Fluoride=
Lithium Bromide=
Potassium Sulfide=

Answers

Answer:

down below

Explanation:

MgCl2

AlF3

LiBr

K2S

The theory of plate tectonics was, at first, rejected by most scientists. Now most geologists accept that tectonic plates exist and that these tectonic plates can and do move. What is responsible for the change in how scientists think about plate tectonics?

Answers

Answer:

The validation of seafloor spreading in the 1950s and 60s

Explanation:

The theory of seafloor spreading was supported by numerous evidence including thermal probes that showed that heat flow over the mid-ocean ridges measured up to four times those measured in general bottom sediments, which are taken as due to the presence of molten Earth material close to the ridge crest

The ridge crest also show signs unusually seismic wave velocities that are considered to be due to microfracturing and thermal expansion from upwelling magma

Ernest Rutherford built on the work of previous scientists and improved the accuracy of the atomic model. What part of the atom is Rutherford
credited for discovering?
A.) The protons
B.) The electrons
C.) The nucleus
D.)The electron cloud

Answers

I think it’s A sorry if it’s wrong

what are chiral carbon

Answers

Answer:

A chiral carbon is a carbon bonded to four different groups ( four groups as carbon forms four bonds). The molecules formed are non superimposible on its mirror image.

the person who answered before me is correct!

what percent of a sample of a radioactive element whose half life=5.0 years will decay after 25 years?

Answers

Answer:

Calculate the rate of decay constant for U-238 if its half-life is 4.468 × 109 years. Answer: If the problem is referring to the half-life, then the ratio of = 0.5 because half of the original sample has already undergone decay.

Explanation:

8)How many grams are in 0.02 moles of beryllium iodide, BeI2?

9)How many moles are in 68 grams of copper (II) hydroxide, Cu(OH)2?

10)How many grams are in 3.3 moles of potassium sulfide, K2S?

11) How many grams are in 2.3 x 10-4 moles of calcium phosphate, Ca3(PO3)2?

Answers

Answer:

0.03:---$7--$-$7$--$-$-$$-$+-$$7-$$-$7-$8$+$-$

What would be a reasonable pH level of the dish soap in your kitchen?

Answers

Answer:around 7

If your dish soap is labeled mild, gentle, or great for hands, chances are its pH level is somewhere right around 7. This mildness makes dish soap perfect for day to day cleaning. Most surfaces won't be damaged by dish soap, and there are a lot of places it can be used besides in the kitchen sink

Explanation: I have had this question before

Answer:

Explanation:

Considering that you use dish soap on a daily occurence... it is best for it to be versatile. By making it 7... it is very neutral.

This means it's not too acidic for some situations... nor is it too basic in other situations.

How many moles of
C
O
2
COX
2

will be produced from
97.0
g
97.0 g97, point, 0, start text, space, g, end text of
C
3
H
8
CX
3

HX
8

, assuming
O
2
OX
2

is available in excess?

Answers

Answer:

Im highy

Explanation:

A 75.0 gram sample of water at 25.0 degrees Celsius is mixed with a 100. Gram sample of water at 60.0 degrees Celsius. What is the final temperature of the water?

Answers

Answer:

The final temperature of the water = 45°C

Explanation:

Heat lost = heat gained

Heat lost by water at 60°C = m₁CΔT₁

Heat gained by water at 25°C = m₂CΔT₂

where m₁ is mass of water at 60°C = 100.0 g; m₂ is mass of water at 25°C = 75.0 g

C, specific heat capacity of water = 4.18 J/g°C

ΔT₁ = (60 - T); ΔT₂ = (T - 25); T = final temperature of the water

m₁CΔT₁ = m₂CΔT₂

100 * C * (60 - T) = 75 * C * (T - 25)

-100T + 6000 = 75T - 1875

-(100T + 75T) = -(6000 + 1875)

175T = 7875

T = 45°C

Therefore, final temperature of the water = 45°C

A balloon filled with helium floats in the air. What does this tell you about the density of helium?

Answers

Answer:

helium is denser than air

Answer:

For air, which has a molar mass of 29.0 g/mol, this gives a density of 1.18 g/l. Helium, which has a mass of 4.00 g/mol, has a density of 0.164 g/l.

What is one danger associated with the use of hydrogen gas

Answers

Answer:

Topping the list of concerns is hydrogen burns. In the presence of an oxidizer -- oxygen is a good one -- hydrogen can catch fire, sometimes explosively, and it burns more easily than gasoline does.

Answer:

hydrogen burns

hope it helps

Explain why both a power source (like a battery) and a complete circuit are necessary for an electromagnet to function.

this is science homework by the way, please help me with it:)

Answers

Answer:

Electromagnets are only functional when electricity is passing through them. In other words, they only create a magnetic field when there is an electric current flowing.

A power source like a battery is therefore necessary to supply the electric current necessary for the magnet to work however, it will not work unless the circuit is closed as electricity cannot not flow in an open circuit because current needs to be able to flow from one end of a power source to the other end.

Explanation:

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Which atom in the following sets has the larger atomic radius?
a. Rn, Ne, Ar, Kr
b. Hg, Cs, Po, W
c. Mg, P, Al, Ar

Answers

Answer:

A.Rn,Ne,Ar,Kr.......

please someone help me its due today thanks :D

Answers

Answer:

Explanation:

All of the above are great examples!

"Endothermic reactions are those which absorb heat during the reaction."

Ian uses litmus paper to determine whether five unknown solutions are acids or bases. The litmus paper turns red when the pH is 4.5 or below and blue when the pH is 8.2 or above. Ian records the results in the data table.

Ian accidentally spills a beaker of an unknown solution. It splashes onto the strip he used to test Solution 1, and the strip turns from red to blue. Based on this observation, which conclusion could Ian make about the solution that he spilled?

Answers

Answer: b

explanation: i had the question on a test and got it right.

Which compound is
ionic?

Answers

Answer:

chemistry

Explanation:

how can air produce a pressure

IN OWN WORDS NOT FROM GOOGLE

Answers

Answer:

Gas pressure is caused when gas particles hit the wall of their contains. the more often the particles hit the walls, and the faster they are moving when they do this , the higher the pressure .

Explanation:

which element has a higher atomic number of aluminum or oxygen

Answers

Answer:

aluminum

Explanation:

oxygen's atomic number is 8.

aluminum's atomic number is 13.

Use the equation below to solve the problem that follows.

2H2 (g) + O2 (g) → 2H2O (g)

When David reacts 13.8 grams of hydrogen gas with excess oxygen, 87.0 grams of water are formed. Calculate his percent yield of water.

Answers

Answer: 142.8%

Explanation:

13.8g H2 * (1 mol H2 / 2 g H2) * (2 mol H2O/ 2 mol H2) * (18 g H2O/1 mol H2O) = 124.2 g H2O

we just calculated our theoretical amount that should be formed and we are given the actual

percent yield: actual/theo * 100% = 124.2/87 * 100% = 142.8%

Predict the products for the following chemical reaction: H2 + O2 →
a. H30
b. H20
c. H2OH
d. OH + OH
O a

Answers

The answer is C I got it right so hope it helped ;)

How many Joules of heat are needed to melt 3.0 g of ice?

Answers

Answer:A substance must absorb heat energy so that it can melt or boil. The temperature of the substance does not change during melting, boiling or freezing - even though energy is still being transferred

Explanation:imm not sure

Other Questions

(Giving brainliest and extra points!! Sorry if its long lol)Scene OneOn an overcast autumn afternoon in the middle of a field with many apple trees. A brother and a sister have a ladder up against an apple tree. One is picking apples and placing them in a sack tied around her waist. The other is holding the ladder steady.Mischa: (standing on the ladder and looking at an apple) I'm not so sure about these. They have a ton of spots and are not quite ripe.Luke: That's alright, we're just making a pie for Sunday dinner anyway. No one will see the spots, and we can add sugar to sweeten them up.Mischa: (Nodding in approval) Yeah, I guess you're right. Mom always likes her pie apples to be a little firm anyways.Suddenly, the wind begins to blow strongly making the ladder tip back and forth slightly.Mischa: (With an alarmed look on her face.) What's going on? There isn't supposed to be a storm today! We'll never make it back to our house before it hits!Luke: (Holding onto the ladder as hard as he can) You need to come down! I can't hold the ladder much longer!Mischa carefully but swiftly climbs down the ladder while the wind is still blowing. Luke holds on to the ladder as it sways back and forth. Mischa makes it to the bottom. They both look toward dark clouds rolling in quickly with thunder and lightning.Luke: (Yelling over the storm) We'd better find some shelter! (Pointing toward a rundown old farmhouse.) I think there's an old farm house that way!Mischa: (Also yelling) You lead the way. I'm too scared!Luke: (Grabbing her by the hand) It's going to be okay! Run with me!Both children run to the old farmhouse holding each other's hand. When they make it there, they enter through an open window.Scene TwoIn the kitchen of the old farmhouse. There is an old dusty table and chairs, but everything else including the stove is gone. The windows are broken, the curtains tattered, and the wallpaper peeling. The wind is picking up and blowing through. The children are calming down. Mischa looks out the broken window where a large dead tree sits close to the house, while Luke sits at the old table. The sack of apples sits on the table.Mischa: It's almost here Luke. The branches on the trees are swaying all over the place.Luke: (Looking at the old tree through the window) Come away from the window Mischa. It's a really bad storm, that's for sure.Mischa: (sitting down in the chair opposite Luke.) I think it's a tornado.Luke: It's not a tornado, but those are some heavy winds.The wind picks up and the curtains sway violently. Something smacks up against the side of the house.Luke: What was that? It's picking up.Mischa: Where are Mom and Dad? Why aren't they here to help us?Luke: Never mind that. We need to worry about ourselves right now. I think we should go down to the ...Suddenly, a tree branch hits the window smashing it even more than it was. Luke and Mischa scream.Mischa: (Yelling) To the basement!The children run toward the basement when Mischa stops and turns back.Luke: (Still yelling) What are you doing? Come back!Mischa: (Still yelling) The apples! I need to grab the apples!Luke: Mischa no!Mischa runs to grab the apples. She gets a hold of the sack and turns around toward the basement again. As she gets to the basement door, the old large tree snaps, cracks, and falls through the kitchen wall. She is okay, but shaken.How does the structure in scene one complement the events in scene two?A) Scene one describes only two of the characters that will appear in the next scene. Nothing tells the reader about their relationship in scene one.B) Scene one describes the setting, introduces the characters, and introduces a storm that calms down in in the scene.C) The first scene describes the setting, introduces the characters, and introduces the storm that the characters will face in scene two.D) Scene one introduces the characters, and introduces the outdoor setting that the characters interact in throughout the play. Which of the following does NOT describe the meaning of the term point of view?A. the place from which readers watch the unfolding action of a storyB. the hints of future events in a storyC. the vantage point from which a story is toldD. the "eyes" through which we see story events HELP ME FAST!!!!!!!!!!!!1 What was one of the responsibilities of an official in ancient Athens?A) to run the festivalsB) to sit on juriesC) to pass lawsD) to take care of all of the paperwork FIND THE MEASURE OF EACH MISSING ANGLE HURRY DUE AT 10 Does anyone wanna do my homework for me (just math) plz &thx What was the Warring States Period? F(x)=-4x^2+10x-8What is the value of the discriminating of f Which of the following shows 7.538 correctly rounded to the ones place?8.038877.5 8. What change in the grandmother is revealed in paragraph 135? Any Umbrella Academy Fans???? Jasmine is 34 years old and is considered a part of the middle class. Jasmines healthcare provider accepts reduced rates for services that were set and not renegotiated. Jasmines health plan is a an equation of the line that passes through (0, 5) and (1.5, 1). What are some good reasons why sex education should be taught in schools? In the figure tw =3x+5 wx =10 and tx =5x-9 2. Which of the values of x below will result in lines m and n being parallel?(1) 41(3) 206x + 14m(2) 5(4) 271340nREASONING.3In the diagram shown below, ABC and AABFABCD. What role does religion play in the disagreements in Palestine? Toussaint L'Overture Why they Rebelled: please complete it (picture) How do u write 342 hundredths Explain why 20 is not a square number.