Chemistry High School

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

why is diamond said to be hard

Answers

Answer: Diamond is said to be the hardest element because it is unbreakable by humans. These diamonds are mined, and they are very hard. A miner knows when they have found diamond when they feel something super hard.

Hope this helps you!

2) A student was working on an investigation to measure the relative activity
of an enzyme at various pH values. He collected the following data:
pH 2, enzyme activity 10; pH 8, enzyme activity 50;
pH 12, enzyme activity 10; pH 4, enzyme activity 20;
pH 6, enzyme activity 40; pH 10, enzyme activity 40

Answers

Answer:

THE LAST ONE

Explanation:

how many grams of oxygen gas are produced when this sample is heated?

Answers

Answer:  2.92%

Explanation:

Is 2.92% which I clearly believe

Are the oldest rocks in the canyon found near the bottom

Answers

Answer: yes they are

Explanation:

because its so hot and the heat just stays at the bottom

please help timed !! due today rn!!what does thermal equilibrium mean

Answers

the condition under which two substances in physical contact with each other exchange no heat energy.

In which of the following physical states are the particles in constant motion?
1. Solid
II. Liquid
III. Gas (Vapor)
I and Ill only
O I. II and III
Oil and ill only
Ill only

Answers

Answer:

cgeh

Explanation:salamat

Snakes and similar animals are members of a group called reptiles.

How do reptiles differ from other animals?

Answers

Answer:

They have skin covered with scales.

Explain what a cold front is.

Answers

Answer:

A cold front is a boundary or zone that separates two air masses. The cooler more dense mass replaces the warmer.

hope this helps :)

Explanation:

Answer:

A cold front is a boundary or zone that separates two air masses. The cooler more dense mass replaces the warmer.

Explanation:

i am smart.....( i think )

Using the em figure what color is the wavelength 436 nm

Answers

Answer:

Blue

Explanation:

Why is hydrogen peroxide sold in opaque plastic bottles?

Answers

it's not a very stable compound

How many days will pass between a new moon and a full moon?

Answers

Answer:

30

Explanation:

im smart

Answer:

The longest duration between full moon to new moon (or new moon to full moon) lasts about 15 days and 14.5 hours, while the shortest duration between full moon to new moon (or new moon to full moon) lasts only about 13 days and 22.5 hours. New Moon appears higher on summer solstice than on winter solstice.

What type of reaction is the equation 2NaCl → 2Na +Cl2?

Answers

Answer:

Synthesis reaction

Explanation:

This is a synthesis reaction. When you combine sodium metal (Na) with chlorine gas (Cl), you form sodium chloride or kosher salt (NaCl).

Hope this explanation helps!

6. What is one way a star with much more mass than the sun can end up?
white dwarf
red giant
neutron star
red dwarf

Answers

Red dwarf is the answer

Answer:

neutron star

Explanation:

A massive star (More massive than the star) will undergo a supernova explosion. If the remnant of the explosion is 1.4 to about 3 times as massive as our Sun, it will become a neutron star. The core of a massive star that has more than roughly 3 times the mass of our Sun after the explosion will do something quite different

Is the following an element, compound, homogeneous mixture, or heterogeneous mixture?

Coca-cola

Answers

Answer:

CO2 is classified as a compound

Explanation:


It is found that after 24!hours 1/8 of the mass of a sample of a radio-active isotope remains What is the half-life of this isotope?

Answers

Answer:7.72 years

Nuclear half-life expresses the time required for half of a sample to undergo radioactive decay.

Explanation:

0.01 = 67.0 ×[tex](\frac{1}{2}) ^{\frac{98.0} {1/2 } }[/tex] [tex]\frac{0.01}{67.0}[/tex] = 0.000149=[tex](\frac{1}{2}) ^{\frac{98.0} {1/2 } }[/tex]

[tex]^{\frac{98.0} {1/2 } }[/tex] =log[tex]_{0.5}[/tex] (0.000149)=12.7

[tex]^{\frac{98.0} {1/2 } }[/tex]=7.72 years

Hope this helps have a great day/afternoon :)

PLEASE explain your answer!!!!​

Answers

Answer:

Explanation: confusing

I need help what is the Find the value of x

Answers

Answer:

45 degrees

Explanation:

as you can see, the box in the corner states that both the angles together are 90 degrees, and half of that is 45. 90/2=45

So, for his this value of x would be 45.

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.

Between Na and Na+ which has larger size​

Answers

Answer:

Na+ is smaller than Na because, it has given away one electron because of which the electron shielding gets stronger due to more protons and less electrons. Whereas, Cl- is larger than Cl because it has gained an extra electron and so, the no.07‏/12‏/2010

Explanation:

what is the electron configuration for gallium

Answers

Answer:

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

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

Which particle changes to create a new element?
A.proton
B.neutron
C.electron

Answers

Answer: A

Explanation:

Explain why you cannot use a pump like the one at the right to
lift water up to the 3rd floor of an apartment building.

Answers

Answer:

can you aks it more clerlry

Explanation:

The capability of a substance to be stretched into thin wires without breaking is known as —
A malleability
B conductivity
C luster
D ductility

Answers

the answer is ductility

Answer:

The answer is D, ductility

Explanation:

The definition of ductile is "(of a metal) able to be drawn out into a thin wire."

Wear lightweight clothes in the_____. not sun or summer and is it heat

Answers

Answer:

there was too much heat

Explanation:

Is the freezing point of this 5??
Please correct my mistake if it isn't.

Answers

Answer:

yes

Explanation:

Answer:

yes

Explanation:

you're smart have a nice evening

The distinctive odor of vinegar is due to acetic acid, HC₂H₃O₂, which reacts with sodium hydroxide. If a 3.45 mL sample of vinegar needs 42.5 mL of 0.115 M NaOH to be neutralized, how many grams of acetic acid are in a 1.00 L bottle of this vinegar?​

Answers

Answer:

Explanation:

CH₃COOH + NaOH = CH₃COONa + H₂O .

42.5 mL of .115 M of NaOH will contain .0425 x .115 moles of NaOH

= 48.875 x 10⁻⁴ moles NaOH

It will react with same number of moles of acetic acid

So number of moles of acetic acid in 3.45 mL = 48.875 x 10⁻⁴

number of moles of acetic acid in 1000 mL = 48.875 x 10⁻⁴ x 10³ / 3.45 moles

= 1.4167 moles

= 1.4167 x 60 gram

= 85 grams .

So 85 grams of acetic acid will be contained in one litre of acetic acid.

what do you think would be a good science fair project for an 8th grade advanced class?​

Answers

Answer:

maybe something about planets or the solar system and they have to make them

Explanation:

Answer:

create a rainbow of flames or build an infinty mirror

Explanation:

Explain what intermolecular forces are, and how they are easily overcome.

Answers

Explanation:

Intermolecular forces are forces that exist between two or more molecules and they can be overcome at high temperatures.

Please answer correctly !!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!! And explain please !!!!!!!!!!!!

Answers

Copper(II) chloride is a blue-green solid. When placed in water, the crystals turn bright green with a slight blue tinge in the water above the crystals. When stirred, the crystals dissolve and form a light blue solution

Hope this is your answer i wasn't able to see he full question so i am not sure

6. How is energy transferred to the earth?I

Answers

Answer:

Energy is transferred between the earths surface and atmosphere.Energy move place to place

Other Questions
True or false: An oxidation number is not the same as an actual charge on an ion. True false question. True False Well I don't know the answer so help me please :p what is the first word How many days will pass between a new moon and a full moon? Jessica had 95 dollars to spend on 6 movies. After buying them she had 17 dollars. How much did each movie cost ?show work What is limited government?A. A ConstitutionB. A governing or controlling body whose power exists only within pre-defined limits.C. a state in which supreme power is held by the people and their elected representatives, and which has an elected or nominated president rather than a monarch.D. a system of government by the whole population or all the eligible members of a state, typically through elected representatives. 1. Convert this fraction into a decimal 1/4 Theocracy can co-exist with monarchy Given the equation of a linear function in standard form 2x + 3y = 12, solve for y. Select all that apply In a certain chemical reaction, the bond energy of the products is 67 kJ andthat of the reactants is 52 kJ. Because energy is conserved, how muchpotential energy does the system release or absorb?O A. The reaction uses up 15 kJ of energy from the reaction system.B. The reaction creates 15 kJ of energy when bonds form.C. The reaction system absorbs 15 kJ of energy from thesurroundings.O D. The surroundings absorb 15 kJ of potential energy. What is energy of an electron with frequency of 5.25 x 10^14 s-1? Summarize a sentence How herd behavior affects individuals? Two pieces of paper are stapled together. The symbol E represents a chord with which quality? Diminished seventh Dominant seventh Major Minor Explain what a cold front is. FIRST RIGHT GETS BRAINLIEST Where do the vast majority of people live in South America? HELP AGAIN PLSTHX BRAIN What were patriots?I Sam makes $10.25 per hour working at Whataburger. He plans to buy a laptop for $550. Write and solve an inequality describing howmany hours h Sam will have to work to be able to buy the laptop. (Round to the next higher hour)