I need help with my chemistry homework

I Need Help With My Chemistry Homework

Answers

Answer 1

Speed in excess of 100 km/h, which is 208.8 km / h

Further explanation  

Linear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration  

• An equation of uniformly accelerated motion  

[tex]\large {\boxed {\bold {x=xo+vo.t+\frac {1} {2} at ^ 2}}}[/tex]

vt = vo + at  

vt² = vo² + 2a (x-xo)  

x = distance on t  

vo / vi = initial speed  

vt / vf = speed on t / final speed  

a = acceleration  

I think it's not chemistry but physics

Known

Δx = 290 m

vf = 0⇒stop

Δt = 10 s

We use the formula in the question

[tex]\tt \Delta x=\dfrac{1}{2}(vf+vi)\Delta t\\\\290=\dfrac{1}{2}(0+vi).10\\\\vi=58~m/s=\boxed{\bold{208.8~km/h}}[/tex]


Related Questions

Gases ___ out and fill their container completely

Answers

Answer: Gases have the lowest density of the three, are highly compressible, and completely fill any container in which they are placed. Gases behave this way because their intermolecular forces are relatively weak, so their molecules are constantly moving independently of the other molecules present. Solids, in contrast, are relatively dense, rigid, and incompressible because their intermolecular forces are so strong that the molecules are essentially locked in place.

Explanation:

Perform the following metric conversions: Please explain bc I really dont get it at ALL !!!!
200.7 pm = _________________________nm
0.000357 hm = ______________________cm
14.78 mg = __________________________ g
8.280 μg = __________________________pg

Answers

Answer:

0.2007 nm

3.57 cm

0.01478 g

8280000 pg

Explanation:

1)200.7 pm

1 picometer is equal to 0.001 nanometer.

1 nm = 1000 pm

200.7 pm× 1 nm / 1000 pm  = 0.2007 nm

2)0.000357 hm

1 hectometer is equal to 10,000 centimeter.

1 hc = 10,000 cm

0.000357 hc× 10,000 cm / 1 hc = 3.57 cm

3) 14.78 mg

1 gram is equal to 1000 milligram.

1 g = 1000 mg

14.78 mg × 1 g/1000 mg = 0.01478 g

4)8.280 µg

1 microgram is equal to 10⁶ picogram.

1 µg = 1000000 pg

8.280 µg× 10⁶ pg/ 1µg = 8.280×10⁶ pg or 8280000 pg

Selena is learning about how engineers choose metals for spacecraft. She discovers that spacecraft engineers often mix other metals with titanium. Titanium is a metal that is both lightweight and strong. It also resists corrosion. Selena wants to compare titanium with other metals. She looks at the cell from the periodic table that represents titanium.




Explain what each of the four items in the cell represents. Then, classify titanium as an alkali, alkali earth, or transition metal.

Answers

Ti is a transition metal.

Further explanation

Chemical symbol represent element or compound

The elements are arranged in the periodic system

1. 22

This is the atomic number of Titanium

The Atomic Number (Z) indicates the number of protons of an element

2. Ti

This is the symbol (chemical formula) of titanium

3. 47.90

This is the mass number of Titanium

Mass Number (A) = Number of protons + Number of Neutrons

Atomic Number (Z) = Mass Number (A) - Number of Neutrons

4. Titanium

This is the name of the element

To determine which group, alkaline, alkaline earth or transition it can be seen from the electron configuration

alkali and alkali earth : configuration from orbital 1s-7s

transition : configuration from orbital 3d-6d (Block d)

Electron configuration from Ti : [Ar] 3d²4s²

if we look at the configuration, then Ti is in the d block which is included in the transition metal

Answer:

The answer is 26

Explanation:

I just took the test

Which of the following models best demonstrates the law of conservation of mass??
(LOOK AT THE PICTURES)!!

Answers

Answer:

i think its D

Explanation:

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Taking into account the law of conservation of mass,

The Law of Conservation of Matter is also called the law of conservation of mass or the Law of Lomonósov-Lavoisier. This law postulates that "The mass is not created or destroyed, only transformed."

This means that the reagents interact with each other and form new products with different physical and chemical properties than those of the reagents. And this is because the atoms of the substances are ordered differently.

But the quantities of the masses involved in a given reaction must be constant throughout it, that is, they will not have changed in their proportions when the reaction ends. Then the mass before the chemical reaction is equal to the mass after the reaction.

The exception to the rule is nuclear reactions, in which it is possible to convert mass into energy and vice versa.

Finally, the correct answer is option A. because the atoms of the substances are ordered differently, this is the reagents interact with each other and form new products.

Learn more about law of conservation of mass:

https://brainly.com/question/20081187?referrer=searchResultshttps://brainly.com/question/23986198https://brainly.com/question/13410855

I WILL GIVE U BRAINLIEST!!!!!!!

Answers

Answer:

I think its b. if not sorry but its the one that makes most sense

Explanation:

Answer:

B

Explanation:

Hope this helps you have a nice day!

Which body system is similar to the nucleus?

Answers

Answer:

the brain

Explanation:

Sodium has______ Valence electrons and bismuth has ________ electrons


Please help ASAP on market as brainlister

Answers

Answer:

Sodium has 1 valence electron and bismuth has 83 electrons (5 valence electrons)

Explanation:

Which statement is not
true?
A. Protons are positive and neutrons are
neutral
B. Electrons have the most mass of the
subatomic particles
C. Protons and Neutrons are found in the
nucleus
Electrons are found outside the nucleus
and have a negative charge

Answers

Answer:

B. Electrons have the most mass of the

subatomic particles

Compared to the mass of neutron and proton, mass of electron is negligible.

Answer:

B

Explanation:

when creating a Bohr model, you will usually mark protons + or P and neutrons are usually 0 or N.

Electrons are on the rings surrounding the nucleus, but everything else is inside.

Electrons are typically represented by - or E

Any one know the answer?

Answers

[tex]1 \: mol MgSO4 \: has \: 4 \: oxygens[/tex]

Thus ;

[tex]2 \: mols \: of \: should \: have \: 8 \: oxygens[/tex]

So the correct answer is (( 8 مول ))

You can separate air into two different substances by density. What is air?
O A. A mixture
OB. A compound
C. An atom
D. An element
SUB

Answers

A mixture I hope it’s righttt!

Which particle changes to create a positive or negative ion of an atom?
A.proton
B. neutron
C. electron

Answers

Answer:

it is alkali

Explanation:

hope it helps you

The answer is Neutron, a proton keeps a positive charge and never changes unless it dies out, same thing fir a electron. An electron keeps an negative charge. A neutron is neutral it is neither a proton or an electron. But it can change if needed to.

Infer Why is a mechanism needed to remove carbon
dioxide gas from your cells?

Answers

Answer:

Because too much Carbon Dioxide can kill us.

Explanation:

^^ what he said. carbon dioxide, if there is enough in our body, can eventually kill us. it can be seen with deep sea divers, which after several continuous deep dives can have a excessive amount of carbon dioxide in there body to a lethal amount, having to force them into special rooms which allows the deep sea divers to decompress slowly and remove a good bit of the dioxide to lower the amount in them.


When 3.00 grams of methane, CH,, reacts according to the balanced equation below, how many molecules of water are produced?
CH, + 202 - CO2 + 2H20

Answers

Answer:

2.41×10²³ molecules of water

Explanation:

Given data:

Mass of methane = 3 g

Molecules of water formed = ?

Solution:

Chemical equation:

CH₄ + 2O₂    →     CO₂  + 2H₂O

Number of moles of methane:

Number of moles = mass/ molar mass

Number of moles = 3 g/ 16 g/mol

Number of moles = 0.2 mol

Now we will compare the moles of water with methane.

               CH₄           :              2H₂O

                  1              :                  2

                0.2            :             2 × 0.2 = 0.4 mol

Molecules of water:

1 mole = 6.022×10²³ molecules of water

0.4 mol ×6.022×10²³ molecules of water / 1mol

2.41×10²³ molecules of water

Nuclear energy is currently used in which three kinds of vehicles?

Answers

Answer:

A. cars, submarines, spacecraft

Explanation:

I took the test.

two disadvantages of series connection?​

Answers

Answer:

1- if one component in a series circuit fails, then all the components in the circuit fail because the circuit has been broken.

2-  the more components there are in a series circuit, the greater the circuit's resistance

15
The correct formula for a compound formed from the elements Al and O is
a. AIO.
b. Al2O.
c. Al3O2-
d. AIO3.
e. Al2O3.

Answers

a.) AlO is the correct formula

Can y’all look at this and help please

Answers

Answer:

2, 3, 4, 5

Explanation:

Pretty sure protons matter a lot unless in acid and bases but ignore this. Atoms mostly empty space as electrons are reeeeeeeeeeaaaallllllyyyy far apart. number of electrons change it is an ion and neutrons change pretty sure its an isotope. Electrons are stupidly small and fast so they don't really count towards the weight. Most mas comes from neutrons and protons in the nucleus

Answer:

2,3,4,5

1st is wrong cuz if u change the number of proton it would change the atomic number which results in different element

6th is wrong because most mass of the atoms come from neutrons and protons collectively so if it would have said THE ATOMS MASS MOSLTY COMES FROM NUCLEONS then u could mark it right

write the molecular fotmula of water​

Answers

Answer:

H20

Explanation:

Answer:

hope it helped you

Explanation:

H2O (u have to write ✍️no 2 below H.

What group of organic compounds include starch?
a Carbohydrates
b Lipids
Thing
C Proteins
d Nucleic Acids

Answers

The answer is A.) Carbohydrates.

pleaseee help ASAP
will mark brainliest!!! <3

Answers

answer: i would say c
explanation:

Answer:

it is C

Explanation:

I saw from Google. Hope it helps.

I cant get the full picture

sorry

How many protons are there in a neutral, stable Hydrogen atom that makes up 99.985% of the element?

A. 1

B.2

C.3

D.4

E.0

Answers

Answer is A because

The explosions that take place during a fireworks show are an example of which of the following? (2 points)

Image of fireworks exploding in air
Chemical change
Chemical property
Physical change
Physical property

Answers

Answer:

Chemical Change

Explanation:

The explosion of fireworks is an example of chemical change. During a chemical change, substances are changed into different substances. In another words, the composition of the substance changes.

name the gas formed when metals react with dilute hcl​

Answers

Answer:

im maybe 80% sure it's hydrogen gas

Answer:

When a metal reacts with dilute hydrochloric acid, it forms a metal chloride salt and hydrogen gas.

Write the half reactions and the balanced equation for the galvanic cell Cu(s)| Cu2+(aq)|| Cu+(aq)| Cu(s). What is the smallest possible integer coefficient of Cu+(aq) in the combined balanced equation?

Answers

Answer and Explanation:

The galvanic cell is:

Cu(s)| Cu²⁺(aq)|| Cu⁺(aq)| Cu(s)

The first two species before the double bar (||) constitute the anodic half reaction (oxidation):

Cu(s) ⇒ Cu²⁺(aq) + 2 e-

The two species after the || constitute the cathodic half reaction (reduction):

Cu⁺(aq) + e- ⇒ Cu(s)

If we multiply the reduction half reaction by 2 (to obtain the same number of electrons than oxidation reaction) and then we add the two half reactions, we obtan the balanced equation:

Reduction (cathode) : 2Cu⁺(aq) +2 e- ⇒ 2Cu(s)

Oxidation (anode) :     Cu(s) ⇒ Cu²⁺(aq) + 2 e-

                                  ------------------------------------

Total equation:         2Cu⁺(aq) + Cu(s)2Cu(s) + Cu²⁺(aq)

Cu(s) is in both reactants side and products side, so we cancel that in both opposite sides to obtain:

2Cu⁺(aq) ⇒ Cu(s) + Cu²⁺(aq)

If we divide the balanced equation into 2, the smallest possible integer coefficient for Cu⁺(aq) is 1:

Cu⁺(aq) ⇒ 1/2 Cu(s) + 1/2 Cu²⁺(aq)

what is octane number​

Answers

Answer:A measure of performance of fuel for internal combustion engines. Stated simply, a higher octane rating corresponds to more engine power and less knocking or other pre-ignition problems.

Explanation:

I'm also in chemistry.

Answer:

Explanation:

figure indicating the antiknock properties of a fuel, based on a comparison with a mixture of isooctane and heptane.

How long does one complete orbit of Earth around
the sun take, give the amount in years and days?

Answers

Answer:365 days, 5 hours, 59 minutes and 16 seconds.

Help meh, please !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

volume of 200mL, density shows it weighs .789 grams for every mL.  .789*200= 157.8 grams

Explanation:

In the human body, a series of chemical reactions results in the making of energy that is used at both the cellular and organismal levels.

In which course would a person most likely study these chemical reactions?
biochemistry
geochemistry
materials chemistry
physical chemistry

Answers

Answer:

It is A: biochemistry

Explanation: i seen there was no answer so i took a chance and surprisingly got it correct

Answer:

e correct option is all of the above

Explanation:

Friendship is delicate as a glass, once broken it can be fixed but there will always be cracks. Two persons cannot long be friends if they cannot forgive each other's little failings. We all lose friends.. we lose them in death, to distance, and over time.

Answers

Answer:

make a new friend if you lose one, Its part of life losing people thats what make us people grow and be more mature.

A mixture that is uniformly mixed is called __. a homogeneous b heterogeneous c suspension d colloid

Answers

Answer:

a. homogenous

Answer:  A. homogeneous

Explanation: A mixture that is uniformly mixed is called homogeneous.

Plz mark brainliest:)

Other Questions
Hugo says that some whole numbers have no common factors. Jasmine says any two whole numbers will always have at least one common factor. Who is correct? Explain. guys i need huge help. this isnt a brainly question but i do my work online, and i have over 150 OVERDUE assignments. ive been doing them but its so so so hard to catch up and REPORT CARDS come out on tuesday. if i dont have my work completed by then ill have all fs HELP ME how can i catch up? any advice? :( write the addition reaction of butane and bromine Help!!! Please please I dont know this at all can someone help be with #3 can someone pls help meThis water bottle has a mass of 0.5 kg. If the net force acting on the bottle is 5 N to the right, what is the bottle's acceleration? (Hint: Use the formula a = ...)A. a = 50 m/s^2 right B. a = 2 m/s^2 leftC. a = 10 m/s^2 rightD. a = 10m/s^2 left the energy of motion kinetic energypotential energy Paige is 64 years old and would like to retire from her job at a large accounting firm. She, however, is concerned about health insurance. She would not be eligible for Medicare benefits until age 65, and due to some serious health conditions, she would not be able to obtain insurance in the private market. She has good health insurance at the accounting firm and is considering putting off her retirement so that she can keep it.Which of the following would likely enable Paige to keep her insurance with the accounting firm until she is eligible for Medicare?A) The Health Insurance Portability and Accountability ActB) The Consolidated Omnibus Budget Reconciliation ActC) The Employee Security ActD) The Insurance Protection Act Consider the following statements about first ionization energies: I. Because the effective nuclear charge for Mg is greater than that for Be, the first ionization energy of Mg is greater than that of Be. II. The first ionization energy of O is less than that of N because in O we must pair electrons in the 2p orbitals. III. The first ionization energy of Ar is less than that of Ne because a 3p electron in Ar is farther from the nucleus than a 2p electron in Ne. Which of the statements I, II, and III is or are true? compare distance and displacement (in science). What element have 5 energy levels of electrons. Which as an atom the last electron is found in the 5p^3 Can I have help with an algebraic equation? 1. What is the width of a rectangle with a length of 14 cm and area 161 cm2? Formula: A=L*W2. What is the radius of a circle with a circumference of 13 ft? Formula: C=2PI*R3. A rectangle has a perimeter 182 in. and length 52 in. What is the width? Formula: P=2*L+2*W4. A triangle has a base of 7 m and an area of 17.5 m2. What is the height? Formula: A=1/2*b*hPls Show Work What does the word keep mean in keep change flip a) keep everything the same b) keep the first fraction the same c) keep the second fraction the same d) keep the sing the same. what was the treaty of paris what describes the ancient empire of Ghana? Form questions for the given answers.A. I was born in the national capital of India. plzzz answer al 5 How does the section "You've Got To Think Ahead" best contribute to the development of ideas in the Newsela article "50 Below is Quite Cold, Even for Alaska"?1 It describes how Alaskans struggle against cold weather.2 It indicates that Alaska is suffering from much colder weather than usual.3 It describes how Alaskans adapt to the cold weather to carry out their daily tasks.4 It shows how the cold weather affects Alaskas economy.What is the authors purpose in mentioning that there are no airplanes flying over Fairbanks and that cars are parked in the Newsela article "50 Below is Quite Cold, Even for Alaska"?1 to inform readers about the distance between Fairbanks and other cities2 to persuade Alaskans to walk to their destinations when able3 to explain how hard it is to travel throughout Alaska4 to describe how the cold weather affects transportation in AlaskaHow does the setting affect the speaker at the end of the poem "The Cremation of Sam McGee"?The quiet setting of the Arctic convinces the speaker to visit Sam McGee's home in Tennessee.The distant setting of the Arctic motivates the speaker to travel a long distance to find Sam McGee.The strange setting of the Arctic causes the speaker to see Sam McGee in the furnace, alive and warm.The unfamiliar setting of the Arctic causes the speaker to lose his mind at the end of the poem.1 What is a theme of Part I of "The Highwayman"?2 When people are in love, they live happily.3 Being in love can give one's life purpose.4 It is hard to find love when one leads a life of crime.5 Leaving a loved one behind is often a mistake.How does the poet show that the highwayman has a positive view of Bess in Part I of "The Highwayman"?The highwayman calls to his beloved Bess by whistling "a tune to the window."The highwayman calls Bess his "bonny sweetheart" and promises to return "though hell should bar the way."The highwayman promises to return with "yellow gold before the morning light."The highwayman repeats the phrase "by moonlight" to show his feelings toward Bess. Drs. Glenn Feltham and David Ambrose began operations of their physical therapy clinic, called Northland Physical Therapy, on January 1, 2017. The annual reporting period ends December 31. The trial balance on January 1, 2018, was as follows (the amounts are rounded to thousands of dollars to simplify):Account Titles Debit CreditCash $ 6Accounts Receivable 2Supplies 2Equipment 10Accumulated Depreciation $3Software 8Accumulated Amortization 3Accounts Payable 6Notes Payable (short-term) 0Salaries and Wages Payable 0Interest Payable 0Income Taxes Payable 0Deferred Revenue 0Common Stock 13Retained Earnings 3Service Revenue 0Depreciation Expense 0Amortization Expense 0Salaries and Wages Expense 0Supplies Expense 0Interest Expense 0Income Tax Expense 0Totals $28 $28Transactions during 2018 (summarized in thousands of dollars) follow:Borrowed $13 cash on July 1, 2018, signing a six-month note payable.Purchased equipment for $16 cash on July 2, 2018.Issued additional shares of common stock for $6 on July 3.Purchased software on July 4, $2 cash.Purchased supplies on July 5 on account for future use, $8.Recorded revenues on December 6 of $47, including $9 on credit and $38 received in cash.Recognized salaries and wages expense on December 7 of $21; paid in cash.Collected accounts receivable on December 8, $8.Paid accounts payable on December 9, $9.Received a $2 cash deposit on December 10 from a hospital for a contract to start January 5, 2019. Data for adjusting journal entries on December 31:Amortization for 2018, $3.Supplies of $2 were counted on December 31, 2018.Depreciation for 2018, $3.Accrued interest of $1 on notes payable.Salaries and wages incurred but not yet paid or recorded, $4.Income tax expense for 2018 was $3 and will be paid in 2019.Record journal entries for transactions (a) through (j).Cash 13Notes-payable (short term) 13Equipment 16 Cash 16Cash 6Common Stock 6Software 2Cash 2Supplies 8Accounts Payable 8Accounts Receivable 9Cash 38Service Revenue 47Salaries and Wages Expense 21Cash 21Cash 8Accounts Receivable 8Accounts Payable 9Cash 9Cash 2Deferred Revenue 2Set up T-accounts for the accounts on the trial balance. Enter beginning balances and post the transactions (a)-(j), adjusting entries (k)-(p), and closing entry.Prepare an unadjusted trial balance and a trial balance. did the federalists or the republicans best embody the principles of the revolution?