Chemistry High School

I need help pls help ASAP I'll give brainliest​

I Need Help Pls Help ASAP I'll Give Brainliest

Answers

Answer 1

Answer: A

Explanation:

Answer 2

Answer:

The answer is A

Explanation:

Related Questions

which substance is a mixture? A. table salt B. gasoline C. aluminium D. carbon dioxide​

Answers

B.) Gasoline. Gasoline is a complex blend of compounds made from petroleum. There are various grades of gasoline. Thus it is a mixture

HELP ME PLEASE!!
HELP!!!
Opportunity cost refers to:
A. the price of a good set by supply and demand in a market.
B. the inability of an economy to address all people's needs.
C. the lost chance to make one choice when another is made.
D. the economic motivation for a business to produce a good or
service.
SUBMIT

Answers

Answer:

C

Explanation:

If you put 8 protons and 8 neutrons, which element did you make?

oxygen
sulfur
berllium
gadolinium

Answers

u make the element oxygen

A plant's growth response to water is called _____.

hydrotropism
geotropism
gravitropism
thigmotropism

Answers

Answer:

A or Hydrotropism

Explanation:

Answer:

hydrotropism Explanation:

because hydro= water and topism= the turning part of an organism hope this helps!! <3

what is the electron configuration for gallium

Answers

Answer:

[Ar] 3d^104s^24p^1

[AR] 3d10 4s2 4p1 is the configuration

If a can of soup 150 g mass and 0.75g/ cm^3 density what’s the volume

Answers

Answer:

The answer is 200 cm³

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density}\\[/tex]

From the question

mass = 150 g

density = 0.75 g/cm³

We have

[tex]volume = \frac{150}{0.75} \\ [/tex]

We have the final answer as

200 cm³

Hope this helps you

What do you think is the difference between an "open" system & a "closed" system?

Answers

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

There are three types of systems in thermodynamics: open, closed, and isolated. An open system can exchange both energy and matter with its surroundings. ... A closed system, on the other hand, can exchange only energy with its surroundings, not matter.

REAL NAME - SHRESTH DUBEY

What is a scale and why do you use it?

Answers

To calculate the weight of something. It is used to find the weight of an object

Answer:

Scale is defined as a system or series of marks used for measuring or registering. An example of scale is what someone would use to figure out the length of something. An example of scale is what someone would use to find out how much they weigh.

Explanation:

Which classification best describes oxygen gas? a element b compound c solution d heterogeneous mixture

Answers

Answer:

oxygen is an element because it is a pure substance which cannot be split into simpler substances by chemical means

Given the standard heats of reaction

Reaction ∆H 0

M(s) + 2 X2(g) → MX4(g) −98.7 kJ/mol

X2(g) → 2 X(g) +327.3 kJ/mol

M(g) → M(s) −20.1 kJ/mol


calculate the average bond energy for a single

M-X bond.

Answer in units of kJ/mol.

Answers

Answer:

Explanation:

M(s) → M (g ) + 20.1 kJ --- ( 1 )

X₂ ( g ) → 2X (g ) + 327.3 kJ ---- ( 2 )

M( s) + 2 X₂(g) → M X₄ (g ) - 98.7 kJ ----- ( 3 )

( 3 ) - 2 x ( 2 ) - ( 1 )

M( s) + 2 X₂(g) - 2 X₂ ( g ) - M(s)  → M X₄ (g ) - 98.7 kJ -  2 [ 2X (g ) + 327.3 kJ ] - M (g ) - 20.1 kJ

0 = M X₄ (g ) - 4 X (g ) - M (g ) - 773.4 kJ

4 X (g ) +  M (g ) =  M X₄ (g ) - 773.4kJ

heat of formation of M X₄ (g ) is - 773.4 kJ

Bond energy of one M - X bond =  773.4 / 4 =  193.4 kJ / mole

The element found in Group 13, Period 2 is ______ a- Al b- Be c- B d- Mg

Answers

c- B which is Boron...

Question 1
Why can't wee see atoms?

Answers

Answer:

They're too small

Explanation:

Atoms are smaller than the wavelength of visible light

Answer:

too small

Explanation:

name two units for density? I need help!!!!

Answers

Answer:

Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). For example, the density of air is 1.2 kilograms per cubic metre.

Explanation:

All covalent compounds donot exist as giant aggregates. Why?​

Answers

This is because of the attractive forces between the molecules with the absence of overall electric charge. Covalent compounds are usually gaseous molecules at room temperature and pressure.

The equation, reactants
product + thermal energy, describes a(n)_____
reaction.

Answers

Answer: Here you go

Explanation:

The general equation for an exothermic reaction is: Reactants → Products + Energy.


Convert the following to Celsius
16) 100°K
17) 200°K
18) 273°K
19) 350°K

Answers

Answer:

16) -173.15cel

17)-73.15cel

18)-0.15

19)76.85

Explanation:

I converted kelvins to cel

Brainly pls

What is the importance of protons ?

Answers

Protons are important because they help keep the nucleus together, they also attract negatively charged electrons and keep them in orbit around the nucleus.

The protons inside a atoms nucleus help to bind the nucleus together. They attract the negative charged electrons and keep them in orbit around the nucleus. The number of protons in an atoms nucleus determine which chemical element it is


Which of the following neutral atom configurations satisfies the octet rule?
1s2 2s2 2p6 3s2 3p6
1s2 2s1
1s2 2s2 3s2 3p4
1s2 2s2 3s2 3p6 4s1

Answers

Answer:

2

Explanation:i did the test

What does the speed of the mixing colors tell you about the speed of the
molecules in hot and cold water?

Answers

Since the colors moved faster in the hit water, it means that the water molecules in the hot water move faster than the molecules in the cold water.

How is iodine 131 similar to a normal atom of iodine?

Answers

Answer: Iodine 131 is a radioisotope with a very short half-life of 8.02 days, making it highly radioactive.

Explanation:

The distance of the Kentucky Derby, a classic horse race, is 1.25 miles. How is this distance expressed in furlongs ?

Answers

So to convert from miles to furlongs you need to multiply by 8 so you do
1.25 x 8
Which is 10 furlongs

A scientist thinks that ducks swim faster when they are in cold water. He tests two groups of ducks, one in cold water and one in room temperature water. He records how fast they swim.

Experimental Group:


Control Group:

Answers

Experimental group is the ducks in cold water
And the control group is the ducks in room temperature water

Mr. Bullis wants to know if he gives teachers candy, it will make them smile more. He gives half the teachers candy and the other half get nothing. He then records the number of times the teachers smiled.

Experimental Group:

Control Group:

Answers

Answer:

the experimental group would be the teachers who recieved the candy

control group would be the teachers who dont get any candy

Explanation:

experimental group is the group that receives the test variable being tested in this case the variable being the candy

and the control group is the group who doesn't receive the variable

purpose of having a control is to rule out other factors which may influence the results of an experiment.

A 2.3 kg object has 15 ) of kinetic energy. Calculate its speed.
O A. 0.12 m/s
OB. 1.1 m/s
O c. 2.4 m/s
OD. 3.6 m/s

Answers

Answer:

The answer is option D

Explanation:

To find the speed given the kinetic energy and mass we use the formula

[tex]v = \sqrt{ \frac{2KE}{m} } \\ [/tex]

where

m is the mass

v is the speed

From the question

KE = 15 J

m = 2.3 kg

We have

[tex]v = \sqrt{ \frac{2 \times 15}{2.3} } = \sqrt{ \frac{30}{2.3} } \\ = 3.61157559...[/tex]

We have the final answer as

3.6 m/s

Hope this helps you

Is sulfur dioxide a element?

Answers

yes it is a element.

HELP!!!! PLEASE, it would be much appreciated.

Answers

It is made of cells, D.

d it is made of cells

Explanation:

because it is the one that makes most sense

PLEASE HELP WILL GIVE BRAINLIEST​

Answers

It’s the atomic number.

What mass of water freezes if 5.43 kJ oh heat are released in the process

Answers

Q= mass•specific heat•change temp. 5.43=m•4.184•(202-32) M=7.63grams

Answer:

16.3 g

Explanation:

got it right on ck

This chart shows characteristics of three different types of atoms.

A 3-column table with one row titled valence electrons in three types of atoms. The first column labeled Atom X has entry 6 valence electrons. The second column labeled Atom Y has entry 2 valence electrons. The third column labeled Atom Z has entry 8 valence electrons.
Which statement is best supported by the information in the chart?

Atom X will donate electrons to Atom Y.
Atom X will accept electrons from Atom Y.
Atom Y will accept electrons from Atom Z.
Atom Z will donate electrons to Atom X.

Answers

Atom X will accept electrons from Atom Y.

Answer:

B) Atom X will accept electrons from Atom Y.

Explanation:

because X has 6 electrons and Y has 2 it would make sense for Y to give to X

What is the term used to describe a change in motion?

Answers

Answer:

it should be momentum if im not mistaken

Other Questions
Lucy invested $19,000 in an account paying an interest rate of 3% compounded annually. Assuming no deposits or withdrawals are made, how much money, to the nearest hundred dollars, would be in the account after 8 years? Look at the words.effect principle decent acceptWhat makes these words difficult to spell? A. They all end in a silent -e. B. They all have a silent consonant. C. They all have doubled consonants. D. They all are commonly confused words. Who was the most famous ruler of Mali what what effect did he have on the North African economy Carefully read the passage from the Quran here. In a well structured paragraph, write a summary to describe three main ideas in the passage The American Academy Dermatology says that hair grows about 6 inches per year. How much hair can you expect to grow after 3 years, given that you do not get any haircuts. -2x+m=5dsolve for m. which of the following do you think is recyclable? Select all that applyMilk cartonsplastic beverage bottleyogurt containersplastic coffee podsAluminum beverage Can None of these Calcium reacts with oxygen to make calcium oxide, CaO. What is the theoretical yield (g) of CaO(s) that could be prepared from 7.75 g of Ca(s) and 2.44 g of O2(g) What is probability? Describe as basic as possible. In a chemical change, the same atoms are recombined into a new substances,TrueOr False What is most likely the benefit of beginning this passage by suggesting Florida is not known for its earthquakes?bIt allows the introduction of personal opinion in the argument.It creates a purpose and a focus for the list of events.It justifies including a series of unrelated events.It makes readers pay attention to arguments against Florida-based earthquakes.C d What would be the best way to grow a stronger brain? Only study a few subjects at which you're good Read the same book at least two times Spend time studying things you find challenging Study the science of the brain and learn how to memorize Which battle is considered the most significant Civil War battle fought in the indian territory? Summarize the battle and its outsome. 3. You need to be ready to run the empire once you create it. What do you need to govern an empire? (Brainstorm some ideas, and draw some from the reading. For example, think about how you might communicate with people in far-off places, oversee building projects, or deal with conquered peoples.)CommunicationAnswer:ExpansionAnswer:BuildingAnswer:People ManagementAnswer:SOMEONE PLS HELP ME What is the slope of a line perpendicular to the line whose equation is 2x+12y=192. Fully reduce your answer. 1).Sumerian2).Doric3).Ironic4).Corinthian Quiz InstructionsQuestion 15 pts(02.01 LC)Which of these factors is likely to have the greatest influence on purchases by consumers to choose a differentoption than originally intended?The price of a good or serviceThe price of alternatives or substitutesTheir own incomeTheir personal preferences Help pls am confused MATH EXPERTS OUT THERE I NEED YOUR ASSITANCE!!!!PLEASE SHOW YOUR WORK ITS DUE RIGHT NOW!!!1. The county fair charges $1.25 per ticket for the rides. Jermaine bought 25 tickets for the rides and spent a total of $43.75 at the fair. Jermaine spent his money only on ride tickets and fair admission. The price of the fair admission is the same for everyone. Use y to represent the total cost and x to represent the number of ride tickets.(a) Define your variables.(b) Write a linear equation that can be used to determine the cost for anyone who only pays for ride tickets and fair admission.(c) Explain your answer to Part 1b...A line goes through the points, (8,9) and (-2,4). What is the slope of the line? Show your work.Write the equation of the line in point-slope form. Show your work.Write the equation of the line in slope-intercept form. Show your work...Line A is represented by the equation, y=1/4 x+5. Write in slope-intercept form the equation of a line that is parallel to Line A and passes through the point, (8,-2). Show your work. Write in slope-intercept form the equation of a line that is perpendicular to Line A and passes through the point, (4," 1"). Show your work.Answer: not sure need help