if you are correct i will be sure to give your brainliest

If You Are Correct I Will Be Sure To Give Your Brainliest

Answers

Answer 1

Answer:

slow down speed updon't change1 will be the right answer

Answer 2

Answer:

Speeds up

Explanation:


Related Questions

Calculate the density of the rock if its mass is 360 g.

Answers

Answer:

12.0 g/mL

Explanation:

From the question given above, the following data were obtained:

Mass of Rock = 360 g

Volume of water = 150 mL

Volume of water + Rock = 180 mL

Density of Rock =?

Next, we shall determine the volume of the rock. This can be obtained as follow:

Volume of water = 150 mL

Volume of water + Rock = 180 mL

Volume of Rock =?

Volume of Rock = (Volume of water + Rock) – (Volume of water)

Volume of Rock = 180 – 150

Volume of Rock = 30 mL

Finally, we shall determine the density of the rock as illustrated below:

Mass of Rock = 360 g

Volume of Rock = 30 mL

Density of Rock =?

Density = mass /volume

Density of Rock = 360 / 30

Density of Rock = 12.0 g/mL

Thus, the density of the rock is 12.0 g/mL

What is the mole fraction of each component if 3.9 g of benzene (C6H6) is dissolved in 4.6 g of toluene (C7H8)

Answers

Answer:

Step 1 of 6

(a)

The mass of benzene is  , so calculate the moles of benzene as follows:

The mass of toluene is, so calculate the moles of toluene as follows:

Now, calculate the mole fraction as follows:

Therefore, the mole fraction of benzene and toluene is  and  respectively.

Step 2 of 6

(b)

The formula to calculate the partial pressure is as follows:

Here,  is the partial pressure of benzene,  is the vapour pressure of pure benzene and  is the mole fraction of benzene.

Vapour pressure of pure benzene at  is.

Substitute the values in the equation as follows:

Therefore, the partial pressure is  .

Step 3 of 6

(c)

Vapor pressure of the solution at 1 atm is  .

When the total pressure of the vapour pressure of the mixture is  at a temperature, then, the solution boils. It corresponds to the boiling point of the solution.

Calculate the total pressure of the solution at  as follows:

Since, the total pressure is less than the atmospheric pressure, the solution will not boil at  .

Calculate the total pressure of the solution at  as follows:

Since, the total pressure is greater than the atmospheric pressure, the solution will boil at  .

Therefore, the boiling point of the solution is  .

Step 4 of 6

(d)

Mole fraction of benzene at  is calculated as follows:

Mole fraction of toluene at  is calculated as follows:

Therefore, the mole fractions of benzene and toluene are  and  respectively.

Step 5 of 6

(e)

Vapor pressure of benzene at  is  .

Partial pressure of benzene is calculated as follows:

Vapor pressure of toluene at  is  .

Partial pressure of toluene is calculated as follows:

Step 6 of 6

Weight composition of the vapour that is in equilibrium with the solution is calculated as follows:

Weight composition of the vapour that is in equilibrium with the solution is calculated as follows:

Explanation:

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Total mol = (3.9 g * 1 mol C6H6 / 78.11 g = 0.0499 mol) + (4.6 g * 1 mol C7H8 / 92.14 = 0.0499 mol) =0.0798 mol.
Mole fraction benzene = 0.0499 / 0.0798 = 0.5.
Mole fraction toluene = 0.0499 / 0.0798 = 0.5

While setting up a beaker to boil a solution on a hot plate, you notice that the stirring is erratic and unstable. What should you do to stabilize the stirring solution? a. Clamp the beaker in place at the edge of the hot plate. b. Move the beaker to the center of the hot plate. c. Turn down the stirring speed. d. Completely turn off the stirring function.

Answers

Answer:

B. Move the beaker to the center of the hot plate

Explanation:

The erratic and unstable stirring might be caused by the beaker not being properly balanced on the hot place, there by distorting the the center of gravity of the stirring motion.

In properly positioning the stirrer to the hot plate, the magnetic rod is positioned to the center of the fluid, allowing for a more fluid and even effective stirring.

I hope this was helpful.

Which of the following is a chemical change? A. soil drying as water evaporates B. a rock eroding as the wind removes particles from it C. a solution of salt water being diluted as water is added to it D. silver tarnishing as the silver metal reacts with sulfur

Answers

Answer:

Its D

Explanation:

I took the quiz

Answer:

D

Explanation:

IT IS REACTING

What type of temperatures and moisture content does Marine time Tropical air have?
Group of answer choices

Cold Temps/ Moist Air

Warm Temps/ Dry Air

Cold Temps/ Dry Air

Warm Temps/ Moist Air

Answers

Answer:

D: Warm Temps/ Moist Air

Explanation:

Tropical places usulay have warm mosit air

Maritime Tropical air is associated with warm temperatures and moist air.

Maritime Tropical (mT) air is a type of air mass that forms over warm tropical or subtropical ocean regions. It acquires its characteristics from the ocean's influence, particularly its warm temperatures and high moisture content.

Warm Temperatures: Maritime Tropical air masses originate from regions near the equator or subtropics, where solar radiation is intense and consistently high. As a result, these air masses are typically warm, with temperatures ranging from mild to hot.

The term "Maritime" refers to air masses that have originated from over the ocean, which generally have higher moisture content due to evaporation from the ocean surface. The term "Tropical" indicates that the air mass originates from or near tropical regions, where warm temperatures are prevalent.

Therefore, the correct answer is: Warm Temps/ Moist Air.

Learn more about Maritime Tropical from the link given below.

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branches of sicence​

Answers

Answer:

Natural science can be divided into two main branches

Explanation:

life science and physical science. Life science is alternatively known as biology, and physical science is subdivided into branches: physics, chemistry, astronomy and Earth science.

Answer:

Astronomy  

Biology

Geology

Chemistry

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Thank You Good Night / Good Day  to you

what is the president for 2020

Answers

Answer:

joe biden

Explanation:

It was DONALD TRUMP :)     But Joe Biden got elected :(

Johnny has thrown a 2kg ball. The ball has an acceleration of 20m/s2. How much was the force that Johnny used?

Answers

Answer:

The answer is 40 N

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 2 × 20

We have the final answer as

40 N

Hope this helps you

Answer: 40N

Explanation:  

Force = mass × acceleration

20 x 2 = force

20 x 2 is 40

Answer 40 N

NOT 40J

What does animals exhale?

Answers

Answer:

Carbon dioxide

Explanation:

Humans are animals and we exhale carbon dioxide

Ammonia (NH3) is the active cleaning ingredient in Windex and is also the main contributor to the odor of stale cat urine. Ammonia has a ΔH°vap of 23.35 kJ/mol and a ΔS°vap of 97.43 J/mol·K. What is the normal boiling point of ammonia

Answers

Answer:

[tex]T_b=239.7K=-33.49\°C[/tex]

Explanation:

Hello!

In this case, since the relationship between entropy and enthalpy for any process is defined below:

[tex]S=\frac{H}{T}[/tex]

For the vaporization of ammonia or any liquid, we can write:

[tex]\Delta S_{vap}=\frac{\Delta H_{vap}}{T_{vap}}[/tex]

In such a way, solving the temperature of vaporization, or boiling point, we have:

[tex]T_{vap}=\frac{\Delta H_{vap}}{\Delta S_{vap}}[/tex]

Plugging in the given enthalpy and entropy of vaporization we obtain:

[tex]T_{vap}=T_b=\frac{23350\frac{J}{mol} }{97.43\frac{J}{mol*K}} \\\\T_b=239.7K=-33.49\°C[/tex]

Best regards!

From the information provided in the question, the boiling point of ammonia is 240 K.

Entropy is the degree of disorderliness in a system. The entropy of a system can be obtained using the relation;

ΔS°vap = ΔH°vap /T

Now;

ΔH°vap = 23.35 kJ/mol

ΔS°vap = 97.43 J/mol·K

T = ?

Making T the subject of the formula and substituting values;

T = ΔH°vap /ΔS°vap

T = 23.35 × 10^3J/mol/97.43 J/mol·K

T = 240 K

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Write the thermochemical equation for the combustion of acetylene, C2H2 (g), in oxygen, for which the standard enthalpy of reaction is -1300 kJ per mole of acetylene.

Answers

Answer:

C₂H₂(g) + 2.5 O₂(g) ⇒ 2 CO₂(g) + H₂O(l)   ΔH° = -1300 kJ/mol

Explanation:

In the combustion of acetylene, it reacts with oxygen to produce carbon dioxide and water. The corresponding chemical equation is:

C₂H₂(g) + 2.5 O₂(g) ⇒ 2 CO₂(g) + H₂O(l)

The thermochemical equation includes the balanced chemical equation, stating the states of aggregation and the enthalpy of the reaction.

C₂H₂(g) + 2.5 O₂(g) ⇒ 2 CO₂(g) + H₂O(l)   ΔH° = -1300 kJ/mol

The volume of a gas decreases to half of its original volume, but the gas maintains the same
number of moles and temperature. According to the ideal gas law, what will most likely
happen to the pressure?

A. It will double.

B. It will decrease.

C. It will increase slightly.

D. It will remain the same.

Answers

Answer:

c

Explanation:

it will slightly increase

Answer:

A

It will double

The size of the orbital is determined by the nn The size of the orbital is determined by the ______ quantum number, so the size of the orbital _______ as this value increases. Therefore, an electron in a _______ orbital is closer to the nucleus than is an electron in a ________ orbital. quantum number, so the size of the orbital The size of the orbital is determined by the _______ quantum number, so the size of the orbital ________ as this value increases. Therefore, an electron in a _______ orbital is closer to the nucleus than is an electron in a ________ orbital. as this value increases. Therefore, an electron in a The size of the orbital is determined by the ________ quantum number, so the size of the orbital _________ as this value increases. Therefore, an electron in a ________ orbital is closer to the nucleus than is an electron in a _________ orbital. orbital is closer to the nucleus than is an electron in a The size of the orbital is determined by the _______quantum number, so the size of the orbital ________ as this value increases. Therefore, an electron in a ________ orbital is closer to the nucleus than is an electron in a ________ orbital. orbital.

Answers

Answer:

Explanation:

The size of the orbital is determined by the principal quantum number (n), so the size of the orbital increases as this value increases. Therefore, an electron in a 1 orbital is closer to the nucleus than is an electron in a 2 orbital.

An atomic orbital can be thought  of as the wave function of an electron in an atom. The Principal Quantum Number (n)  is one of the quantum numbers that are required to describe the distribution of electrons in atoms. This quantum number has positive integral values such as 1, 2, 3 and so on. It also relates to the mean distance of the electron from the nucleus in a given orbital. The larger the quantum number, the greater the mean distance of an electron in that orbital from the nucleus, therefore the orbital will be larger.

10 things you should never do while making a measurement in chemistry

Answers

Answer:

Measure at the top of the meniscus

Hold the container (it is unsteady)

Explanation:

I'm really, really, sorry. I took chemistry in 6th grade and I'm in 8th, and I don't remember the entire list. This is all I could think of.

The autoignition of both ethanol and octane occurs at 363 oC. Which gas sample contains the gas molecules that have a greater average kinetic energy

Answers

Answer:

See explanation

Explanation:

At the same temperature, the average kinetic energy of gases depends on the molecular mass of the gas. Hence,  given a particular temperature, lighter molecules travel faster on the average than heavier molecules.

Considering ethanol and octane, The molar mass of ethanol is 46.07 g/mol while the molar mass of octane is 114.23 g/mol. Hence, ethanol has a greater average kinetic energy than octane at the same temperature.

explain what happens to temperature and energy as molecules move from gas to liquid to solid

Answers

Answer and Explanation:

As the temperature of the substances increases, the average energy of the molecules increases, and average energy of attraction between the molecules decreases consequently intermolecular spacing between the molecules increases. As a result, a substance change in succession from gas to liquid to solid.

By what mechanism does cyclohexanol react when treated in concentrated sulfuric acid/phosphoric acid and what compound results?

Answers

Answer:

The mechanism is E1 and the product is cyclohexene

Explanation:

Attached to this answer is an image of the reaction mechanism of the reaction between cyclohexanol and concentrated sulfuric acid/phosphoric acid. The acid (H3O^+) acts as catalyst.

We can see that the first step in the mechanism is the protonation of the -OH group of the alcohol. This is followed by loss of water molecule which is a good leaving group.

The water now acts as a Lewis base by abstracting a proton from the substrate, forming cyclohexene and regenerating the acid catalyst.

Please i really need help

it's due today

Answers

Answer:

coke and mentos are basically just a small scale replica

Explanation:

what is the the correct equation for water gas​

Answers

Answer:

Water-gas A mixture of carbon monoxide (CO) and hydrogen (H2) produced by passing steam over red-hot coke using the endothermic reaction C + H2O → CO + H2.

The temperature at which a particular liquid becomes a gas
5 points
A melting point
B boiling point
C freezing point
D sublimation point
5 points
a substance made of at least two atoms that are chemically combined
Apure substance
B element
C compound
D mixture

Answers

Answer:

A: melting point and the other one is i think element

1. B: boiling point 2. Is either B or C

How many moles of O2 are required to react completely with 5.00 moles of C4H10?
A) 10.0
B) 20.0
C) 26.5
D) 32.5

Answers

Answer:

32.5

Explanation:

2C⁴H¹⁰ needs 13 O²

5 C⁴H¹⁰ needs (13/2 × 5) O² = 32.5 O²

The answer is D, 32.5

(I took the test)

The bond lengths of the X-H bonds in CH4, SiH4, and SnH4 are 1.09, 1.48, and 1.71 Å, respectively. Estimate the length of the Ge-H bond in GeH4. Which of these four hydrides has the weakest X-H bond?Estimated Ge-H bond length =________________ ÅWeakest X-H bond in ________________

Answers

Answer:

what

Explanation:what

Given the reaction _K(s) +_ Cl2(g) → _KCl(s) what is the amount of K, in grams, needed to completely react with 2 moles of Cl2(g)?

Answers

Answer:

156.4g K

Explanation:

I'm not sure if it is correct but I think it should be this

What do we know so far?: 2K + 1Cl2 -> 2KCl, 2 mol of Cl2

What are we looking for?: #g of K

What is the ratio of K to Cl2?: 2:1

Set up equation: 2molCl2 x [tex]\frac{2mol K}{1 mol Cl2}[/tex]

Cancel unwanted units: 2 x [tex]\frac{2mol K}{1}[/tex]

Answer we got: 2 x 2mol K = 4mol K

Converting moles to grams: 4 x 39.1 (molar mass of K) = 156.4g K

In this periodic table, which type of element is shown in green boxes?
A. Metalloids
B. Nonmetals
C. Noble gases
D. Metals

Answers

Answer: A

Explanation:

Metalloids

Which of the following accurately pairs the part of an atom to its charge? A. Proton—no charge B. Neutron—positive charge C. Electron—negative charge D. Electron—no charge

Answers

Answer:

I think it's c but I'm not sure

Answer: C

Explanation:

2. Which of the following would produce a precipitate when mixed water (H20)?
A) HNO3
B) Br2
C) BaS
D) PbBr2

3.Given that the reaction below is a precipitation reaction, what is the missing symbol?
Li2CO3 (aq) + BaS (aq) - > LiOH (aq) + BaCo3 (?)

Answers

Answer: #2 : s, solid & #3 : PbBr2

Explanation:

In the reaction [tex]\rm Li_2CO_3 (aq) + BaS (aq)\rightarrow LiOH (aq) + BaCo_3 (?)[/tex] the missing symbol is s . The PbBr₂ will produce a precipitate when mixed water. Hence option D is correct.

What is chemical reaction?

Chemical reaction is defined as a procedure that involves changing a substance's molecular or ionic structure, as opposed to changing its physical shape or undergoing a nuclear reaction. When atoms establish or break chemical bonds, chemical reaction take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

Precipitation is defined as the mechanism by which water vapor in the atmosphere condenses and descends to the ground under the pull of gravity. Water vapor in the clouds condenses into increasing-sized droplets of water, forming precipitation. To replenish the water on the earth, precipitation is required. This world would be a vast desert if it didn't rain. Within an estuary, water level and water quality are impacted by the frequency and length of precipitation events.

Thus, in the reaction [tex]\rm Li_2CO_3 (aq) + BaS (aq)\rightarrow LiOH (aq) + BaCo_3 (?)[/tex] the missing symbol is s . The PbBr₂ will produce a precipitate when mixed water. Hence option D is correct.

To learn more about chemical reaction, refer to the link below:

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How many atoms are in this given equation 6Mn3C2

Answers

Answer:

There are three atoms in the equation

Some organizations are buying sections of forest. Once purchased, these sections will never be cut down. What is most likely the main reason for protecting these sections of forest? A Cause the extinction of undesirable animal species, B Prevent these trees from reproducing too fast, C Maintain the diversity of the living environment. D Crovide more land for agricultural purposes.​

Answers

Answer:

I think is C

Explanation:

'Cause the questions says "these sections will Never cut down", so that means is proctecting the environment

element that is the "best" at removing electrons from other atoms.

Answers

Answer:

Fluorine

Explanation:

Fluorine is the "best" at removing electrons because it has 5 electrons on its second shell. The 5 electrons are really close and are trying to drag in another electron to complete the shell and have all 6 electrons to complete the valence shell.

When a sample of liquid is heated, its thermal energy _______.

Answers

Answer:

Entropy.

Explanation:

I really hope this is right! sorry if its wrong

When a sample of liquid is heated, its thermal energy: increases.

Thermal energy can be defined as the energy possessed by an object due to the movement of its particles.

Basically, the temperature of an object or system is highly dependent on thermal energy.

Hence, temperature is directly proportional to thermal energy.

Additionally, as the temperature of an object increases due to the application of heat, the thermal energy of the object increases.

In conclusion, thermal energy increases when a sample of liquid is heated.

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Nicholas has some cans at home to donate to the soup kitchen, but decides to start a can drive at his school to see if others will help. The equation representing this is y = 235x + 15, where x is the number of days, and y is the number of cans collected. Which statements are true based on the equation given. Select all that apply.A Nicholas had 235 cans at home.B The school collected 235 cans a day.C Nicholas had 15 cans at home.D The school collected 15 cans daily. What task did the second continental congess give the five me? What limits do Americans truly have in regard to their freedoms? Logistics means creating an efficient assembly line.A. TrueB. False Complete the point-slope equation of the line through (1,-1)(1,1)left parenthesis, 1, comma, minus, 1, right parenthesis and (5,2)(5,2)left parenthesis, 5, comma, 2, right parenthesis. Use exact numbers. y-(-1)=y(1)=y, minus, left parenthesis, minus, 1, right parenthesis, equals 7 divided by c expression Creative singing chain: Say you remember me. melting is considered a(n) ___ change because energy is gained by the substance as it changes stateA. Physical.B. Chemical.C. Volume.D. Dynamic. Which describes a social worker? A. specialist in diagnosing and treating mental health conditions who can prescribe medication Why are molecular covalent compounds insoluble in water? i gotta another question!! 6+x/8=1Solving Two-Step p.s the -6 + x is both on top of 8 For which values of A, B, and C will AX +BY=C be a vertical line through the point (8,6) A. A=1, B=0, C=6B. A=1, B=0, C=8C. A=0, B=1, C=6D. A=0, B=1, C=8 Comment if you have really strict parents, mine are really strict and I wanna see if anyone has stricter parents the me ;-; 4. There always seems to be art, in every culture, and every time. Art even manages to get ionto center stage, even though it isn't necessary to our living and breathing. Why do you thipeople all over the world and through all time make art? The following sentence is taken from the interview with Mansour Al Marri; however thewords have been mixed up. Rearrange the words to create a grammatically correctsentence.we will be able to create / cooler and more comfortable villas and apartments / as long as / tocapture the wind naturally present around Abu Dhabi, / we can use this technology You Are my Fire The One Disire Continue The Song If a child, dog, and Mom weren't under an umbrella, why didn't they get we? In the equation y = 2^x, 2 is the ______ and is the ______. Write an equation that could be used to fine the number of comic books, x Jacob needs to sell in order to earn $200. In which order did the pre Civil War compromises occur?