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

Answers

Answer 1
B.) Gasoline. Gasoline is a complex blend of compounds made from petroleum. There are various grades of gasoline. Thus it is a mixture

Related Questions

The first ionization energy of fluorine and iodine

Answers

Answer:

The most electronegative atom, fluorine, is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7. First Ionization Energy of Iodine First Ionization Energy of Iodine is 10.4513 eV.

Explanation:

Dashawn has to find the volume of his phone for science
class. He uses a ruler to measure its length, width, and
height and finds the following:
| = 17 cm
w = 7.5 cm
h = 0.8 cm
What is the volume of Dashawn's phone?

Answers

Answer: Volume of rectangle = L * W * H

Explanation: Multiply the 3 numbers together

Answer:

volume = L x W x H

V= 17 x 7.5 x 0.8

V = 102 cm^3

Explanation: Multiply the three number.

To find the volume, you multiply length times width times heigh

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

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.

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!

Please answer correctly !!!!!!! Will mark brainliest !!!!!!!!!!!!

Answers

I beleive it would be 0.8

the volume of water alone is 4.8

the volume of rock and water is 5.6

you would subtract them both to find the volume of the Rock.

Calculate the mass percent of sulfuric acid in a solid sample given a 0.8390g sample of that solid required 32.22 mL of 0.2012 M NaOH for neutralization.
A) 62.11
B) 2.64
C) 37.89
D) 75.78
E) 1.27

Please give an answer and an explanation, thanks!

Answers

Answer

C

Explanation:

i remember learning this

Mass percentage does not have any unit as numerator and denominator contains the same unit. The percentage of sulfuric acid in solid sample is 38.07%.

What is percentage by mass?

Mass percentage represents the the percentage of each element that is making a particular compound.

Mathematically,

Percentage of mass = (component’s mass ÷ total mass) x 100%

[tex]\rm 2 NaOH aq + H _{2} SO _{4} aq → Na _{2}SO _{4}aq + 2 H _{2} O[/tex]

Volume of NaOH solution = 32.22 mL = 0.03222 L

Concentration or molarity of the NaOH solution = 0.2012 M

Moles of NaOH : 0.03222×0.2012=0.006444mol

2 moles of sodium hydroxide reacts with 1 mole of sulfuric acid.

0.006444mol of sodium hydroxide reacts with =0.006444÷2=0.003222mol of sulfuric acid.

Mass of sulfuric acid neutralized = 0.003222 moles × 98.08 g/mol =0.31601376g

Percentage of sulfuric acid in solid sample= (0.31601376g÷0.8390g)×100=38.07%

Thus the percentage of sulfuric acid in solid sample is 38.07%.

To learn more about mass percentage, here:

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What are the names of the two categories of living organisms?

Answers

Answer:

Prokaryotes (which are bacteria and archea)

Eukaryotes (which is plants, animals, protists and fungii)

Question 3 (4 points)
A dipole bond is formed when electrons are not shared equally in a covalent bond, resulting in a partial negative charge on one end of the
molecule and a partial positve charge on the other end.
O True
O False

Answers

The answer is true.

If a 20-N net force makes an object accelerate at 10 m/s^2, what is the mass of the object?

Answers

Answer:

The answer is 2 kg

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

where

a is the acceleration

f is the force

From the question we have

[tex]m = \frac{20}{10} \\ [/tex]

We have the final answer as

2 kg

Hope this helps you

When bonding, what is most likely to happen between the atoms listed below?

A.) Atom X will donate electrons to Atom Y
B.) Atom X will accept electrons from Atom Y
C.) Atom Y will accept electrons from Atom Z
D.) Atom Z will donate electrons to Atom X

Answers

Answer:

atom x will accept electrons from atom y

Explanation:

in bonding the main purpose is to gain stable electronic configuration hence atom y will give out the two valence electrons to atom x

this kind of bonding where one of the atom is the one donating the electrons is known as ionic bond.

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 )

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

Answers

Answer:

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

Explanation:

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

Answers

Answer: A

Explanation:

Answer:

The answer is A

Explanation:

An ice cube is placed in a glass of water. Which of the following best explains the
heat transfer?

A: The thermal
is moving
from the water to from the ice cube into the water into the water
causing the
temperature of
the water to
increase.
B: the thermal energy is moving from the water to the ice cube causing the temperature of the water to decrease
C: the thermal energy is moving from the ice cube into the water causing the temperature of the water to increase
D: the thermal energy is moving from the ice cube into the water causing the temperature of the water to decrease.​

Answers

D: the thermal energy is moving from the ice cube into the water causing the temperature of the water to decrease.​



1 mole of a gas occupies 22.4 L at ________

Answers

Answer: At STP, one mole (6.02 × 1023 representative particles) of any gas occupies a volume of 22.4 L (Figure below). A mole of any gas occupies 22.4 L at standard temperature and pressure (0°C and 1 atm).

Explanation:

That the answer

1 mole of a gas occupies 22.4 L at (0°C and 1 atm). It is the standard temperature and pressure.

What is Avogadro's hypothesis?

Avogadro's hypothesis says that all gases have an equal number of particles at the same temperature and pressure.

The empty space between the particles makes up the majority of a gas's overall volume.

Due to this, the size of the particles themselves is nearly insignificant.

The volume of one mole of a gas at standard temperature and pressure is known as the molar volume.

Thus, the correct option is 0°C and 1 atm.

Learn more about Avogadro's hypothesis

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which is a characteristic of the part of the atom marked A

Answers

Answer:

Please upload the picture and I can answer

Explanation:

Answering: it is mostly empty space

Explanation:

when is an object in free fall

Answers

Answer:

a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.

Electron configuration always starts with the lowest energy electrons.
true or false

Answers

Answer:

True I think..-

Explanation:

Sorry if it's wrong.-

The mass of an object is 24g and the volume of the object is 16 mL. Calculate the
density of the object?

Answers

Answer:

D = m/v

Explanation:

So m = 24g and v = 16mL. (I assume these are the units being used). Then, we get D = 24g/16mL which is 1.5 g/mL

EXPLANATION OF THE MESOSPHERE ASAP PLSSS

Answers

The mesosphere is a layer of Earth's atmosphere. The mesosphere is directly above the stratosphere and below the thermosphere. It extends from about 50 to 85 km (31 to 53 miles) above our planet. Temperature decreases with height throughout the mesosphere. ... Most meteors vaporize in the mesosphere.

How can you tell if an element is a metal or a nonmetal??

Answers

Answer:

Elements to the left of the line are considered metals. Elements just to the right of the line exhibit properties of both metals and nonmetals and are termed metalloids or semimetals. Elements to the far right of the periodic table are nonmetals. The exception is hydrogen (H), the first element on the periodic table.

Explanation:

Answer:

looking at its metallic luster

Explanation:

Elements may be classified as either metals or nonmetals based on their properties. Much of the time, you can tell an element is a metal simply by looking at its metallic luster, but this isn't the only distinction between these two general groups of elements. Most elements are metals.

See the reference image for the chemical equation for the reaction you just observed. What do you think each side of the equation represents? What do the symbols in the equation represent? Be prepared to share your thoughts with a partner.


HELP QUICK

Answers

Answer:

Detail is given below.

Explanation:

Chemical equation:

4NH₃ + 3O₂      →     2N₂ + 6H₂O

This reaction shows that when ammonia react with oxygen it form water and nitrogen gas.

There are two reactants on left hand side oxygen and ammonia. Ammonia is formed when nitrogen and hydrogen react. While on right hand side there are two products nitrogen and water. Water is formed by the reaction of hydrogen and oxygen.

The given reaction also shows that it follow the law of conservation of mass.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.  

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.


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

Please help will give brownies

Answers

Answer:

1.A 2.B

Explanation:

your welcomme glade to help

A number in front of a chemical formula

Group of answer choices

subscript

coefficient

Answers

Answer:

the answer is coefficient

Answer:

Coefficient is your answer

HOPE THIS HELPED YOU

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CaCO3
How many atoms of oxygen are in one
molecule of calcium carbonate?
A 1
B3
C5
D6

Answers

Answer:

B. three atoms of oxygen

Which statement best describe what happens during a chemical change

Answers

Answer:

both the identity and the properties of a substance change.

Answer:

its A both the identity and the properties of a substance change

Explanation:

got it right on edge

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.


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 :)

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