Chemistry High School

I'm very confused please help​

I'm Very Confused Please Help

Answers

Answer 1

Answer:

the food chain you mean

Explanation:

pollution than mosquitoes then alligators

Related Questions

PLEASE HELP ASAP Chet is creating a catapult that will allow him to propel a ball farther than he is capable of throwing it. As he is creating the device, he finds that that catapult launches the ball straight up into the air. The catapult should propel the ball up and forward to create a trajectory.

Which of the following is the best solution to this problem?

A.
leave the design as is because the ball goes higher than he can throw it

B.
make changes to the design to allow it to launch the ball a farther distance

C.
discard the device and begin the engineering process again from the start

D.
leave the design as is but perform more tests to see if the problem improves

Answers

Answer:

IM NOT COMPLETELY SURE BUT ITS ETHER A OR B IM SORRY ;//

Explanation:

The temperature of a city during a week was 35° C, 36°C, 34°C, 38°C, 40°C, 39°C and 44°C. What was the average daily temperature of the town for the week?

Answers

Answer:38°

Explanation:

WHICH OF THE FOUR COMPOUNDS HAS BONDS WITH THE GREATEST DEGREE OF POLARITY (MOST POLAR)?

Answers

Answer:

I NEED TO KNOW THIS TOO

Explanation:

IVE BEEN LOOKING FOR THE ANSWER

Does SiO2 also equal Si2O4?
(silicon atom 1 oxygen atom 2 = silicon atom 2 oxygen atom 4?)

Answers

Answer:

7

Explanation:

that is the anwer of the question

On any given day or night, what determines the visible phase of the moon

A. how much of the sunlit side of the moon is visible

B. the time of day or night that we look at the moon

C. how far the moon has rotated on its axis

D. how much of the moon is lit by the sun

Answers

Answer:

i think the answer is D if not its A

Find the number of moles if you have 1.2 x 1048 copper atoms.

Answers

Answer:

1.993 × 10^(24) moles

Explanation:

From avogadro's number, we have that;

1 mole of atoms contain 6.022 × 10^(23) atoms

Therefore, 1.2 x 10^(48) atoms of copper will contain;

(1.2 x 10^(48) × 1)/(6.022 × 10^(23)) = 1.993 × 10^(24) moles

do activity for brainiest:)

Answers

What’s are the matters

Uranium has three common isotopes. If the abundance of 234U is 0.0054%, the abundance of 235U is 0.7204% and the abundance of 238U is 99.2742%, what is the average atomic mass of uranium?

Answers

Answer:

237.9 amu

Explanation:

Given data:

Abundance of U-234 = 0.0054 %

Abundance of  U-235 = 0.7204%

Abundance of  U-238 = 99.2742%

Average atomic mass = ?

Solution:

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass  / 100

Average atomic mass = (0.0054×234)+(0.7204×235) +(99.2742×238)  /100

Average atomic mass =  1.2636+ 169.294+ 23627.2596 / 100

Average atomic mass = 23797.8172/ 100

Average atomic mass = 237.9 amu.

HELP
Between steps 2 and 3, the chemical energy in the coal is converted to

Answers

Answer:

Transitional Energy ......

Explanation:

Hope this helps..................................

Answer:

heat energy!!!

Explanation:

Question 7 of 10
Which of the following elements has the largest first ionization energy?
A. Boron (B)
B. Oxygen (0)
C. Carbon (C)
D. Nitrogen (N)

Answers

The answer should be B. Oxygen

PERIODIC TABLE
What element is located at the period 3, group 13?

Answers

Answer:

Aluminiun

Explanation:

Which HTML tag is used to create a heading on a web page? (5 points)

Answers

HTML headings are defined with the <h1> to <h6> tags. <h1> defines the most important heading.

hope this helps ^^

I really need your guys help, I need to pass.​

Answers

Answer:

Question 4 is 291.0346

Explanation:

Please help If You Are Able To. Where do these go?

Answers

Answer:

Sorry can't help

Explanation:

Cant help!


What type of reaction is this:
C + 02 --> CO2

Answers

Answer:

synthesis reaction

Explanation:

A + X --> AX

Answer:

Combustion reaction

Explanation:

How is gamma radiation produced?

Answers

Answer:

They are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and regions around black holes. On Earth, gamma waves are generated by nuclear explosions, lightning, and the less dramatic activity of radioactive decay.

Which of these bonds should be classified as ionic?
A.
Na-O

B.
C-S

C.
H-Cl

D.
Be-S

Answers

Answer:

Na-O

Be-S

Explanation:

ionic bonds= metal and non metal

Answer:

Na-O

Explanation:

i solved it in study island and i got this answer correct

Please help!!! I'll give brainliest to the most helpful answer
please this is due today and I have no idea :// 3

Answers

87) A
88) D
89) B
90) E
91) C

whats the difference between a bonding electron domain and a nonbonding electron domain?​

Answers

Answer:  lone pair of electrons

Explanation: A bonding electron domain is a pair of electrons shared between two atoms and a nonbonding is a lone pair of electrons

The difference between the bonding electron domain and a nonbonding electron domain should be explained below.

Difference between bonding and non-bonding electron domain:

A bonding electron domain refers to the region that lies between the two bonded atoms that comprise one or more pairs where the electrons should be bonded.

While on the other hand, the non-bonded electron contains on the single-atom also comprise of one pair of lone pair.

In this way, it should be differentiated.

Learn more about electron here: https://brainly.com/question/24401678

Question 10
Which of the following is a sign that you might be in an extremely unsafe situation?
A) you see frayed electrical cords on the machine you are asked to use
B) other workers are getting burned on the fryer that you are supposed to use
C) you are shown a forklift truck - something you have never operated before -
and told to move a heavy load of materials across the warehouse floor
D) only a) and c)
E) all of a), b), and c)

Answers

Answer:

Here it would be A,B and C because all the examples are violating safety precautions. They are all examples of un safe signs.

Hope this helps

Explanation:

Balance the Chemical Equations

MgF2 + Li2CO3---> MgCO3 + LiF

Please Help

Answers

Answer:

MgF2 + Li2CO3 ---> MgCO3 + 2LiF

Explanation:

how can a substance stay at a certain temperature even though it is being heated?​

Answers

The temperature of a certain substance can be seen as the average speed of the atoms or molecules in that substance. In the liquid state of a substance the forces between the atoms or molecules are strong enough to keep them together, however with enough freedom to move, unlike in the solid state. If we would have a closer look at the surface of a liquid from sideways, we would see water molecules jumping out of the water and reentering it again. The lower the water temperature would be the lesser the amount of water molecules leaving the liquid phase would be. If water would be heated up and the temperature will reach 100 degrees C at normal atmospheric pressure, more water molecules would leave the water than reentering. Boiling has started. The temperature of the water remains at 100 degrees C, if the heating continues as the average speed of molecules will not increase, only the rate of molecules leaving the water will increase, until all the water in liquid state has been vapourized. The amount of heat needed to vapourize liquid water is called latent heat. Latent heat is a very important driving factor in the atmosphere and thus the weather.

Predict the balanced product for the acid base reaction of phosphoric acid with ammonium hydroxide.

Answers

Answer:

htt ps://w ww.you  tube. com/watch?v =oyy377 Yoj4I

Explanation:

Explain why you might feel ill after a vaccine

Answers

Answer:

Possibly a bad reaction as some people's immune systems are weaker than others

Explanation:

ITEM BANK: Move to Bottom
Balance
Measured in Newtons
Measured in grams
Property of matter
Spring Scale
Weight
Both
Mass
Cugan 100
drag and drohte

Answers

Answer:

The scale reads the tension in the string. The tension in the string is 100 N. This is the force the string must exert up on either of the 100-N weights at either end of the string.

Nothing is moving, nothing is accelerating, so the net force on the spring is zero. Likewise, the net force on either of the 100-N weights is also zero. But that is another question. The spring scale does not measure the net force. The spring scale simply measures the tension, the magnitude of the force exerted by the string.

Explanation:

When sodium atoms (Na) and chlorine atoms (CT) join to make sodium chloride, or table salt, they form an ionic bond, Using this information, which pair of elements is most likely to form an ionic bond? O potassium (K) and fluorine (F) aluminum (AI) and aluminum (AD O sulfur (S) and oxygen (O) O calcium (Ca) and neon (Ne)​

Answers

Answer:

D I'm pretty sure.

Explanation:

I'm taking the quiz right now and D makes the most sense.

Answer:

d

Explanation:

properties changes if the size of an object changes?

A.mass
B.volume
C.weight
D.all of the above

Answers

Answer:

D

Explanation:

The answer should be D, when the size of an object changes it changes how much mass it has how heavy it is (weight), and how much space it takes up (volume).

what charged particle is produced during ionic bonds

Answers

Answer:

An ionic bond is formed by the complete transfer of some electrons from one atom to another. The atom losing one or more electrons becomes a cation or a positively charged ion. The atom gaining one or more electrons becomes an anion which is a negatively charged ion.

The prefix "semi-" means "partly". Based on your knowledge of the properties of elements, which kind of element is most likely used to make semiconductors?

liquids
metalloids
metals
nonmetals

Answers

Answer:

metalloids

Explanation:

The kind of element most likely used to make semiconductors are the metalloids.

These elements have properties between those of metals and non-metals in that they are not truly metals and are partly non-metals.

Under certain conditions they show features of metals or non - metals. The class of these elements are the metalloids. They are used to make semiconductors which are major components of electronics.

HELP HELP HELP HELP HELP HELP HELP

Answers

Well, the answer to this question is B.
Also, I just want to say Happy new year to you and have a great rest of your day!
Also, can you please mark my answer as the brainliest answer?
Thank you!
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