GIVING BRAINLY
this equation describes a chemical reaction : aluminum + iron oxide → aluminum oxide + iron
Which of the following statements about the chemical equation is true? * view attachment for answer choices*

Explanation:

lithium hydrogen sodium oxygen

Answer:

MnO2 M n O 2 is an ionic substance without any oxo-anions, therefore its name has the -ide ending.

Answer: D

Explanation:  Physical science is the study of the inorganic world. That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

Answer:

The air above land also warms faster than air above the sea. Cooler higher pressure air above the ocean moves toward warmer lower pressue air above land.

Answer:

Use the sources to help you, but I would say above the water.

Explanation:

"However, water heats up much more slowly than land and so the air above the land will be warmer compared to the air over the ocean. The warm air over the land will rise throughout the day, causing low pressure at the surface. Over the water, high surface pressure will form because of the colder air."

AND

"The depth (distance from top to bottom) of the atmosphere is greatest at sea level and decreases at higher altitudes. With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude."

I hope this helps you!

Answer:

207g/mol

Explanation:

Given parameters:

Mass of the lead  = 41.4g

Number of moles  = 0.2mole

Unknown:

Molar mass of lead = ?

Solution:

The molar mass of substance is related to mass and number of moles using the expression below;

           Mass = number of moles x molar mass

        Molar mass = [tex]\frac{mass}{number of moles }[/tex]

Now insert the parameters and find the molar mass;

     Molar mass = [tex]\frac{41.4}{0.2}[/tex]   = 207g/mol

Answer:

Answer. There are 1.5×1024 molecules in 220 g CF4 .

Answer:

gases

Explanation:

Their atoms are the least far apart

Answer:

d) atmosphere pressure

Answer:

B.) weather

Explanation:

weather is constantly changing everyday and each day presents a new condition:)

Answer:

Molten lead bromide, PbBr 2(l), is an electrolyte. During electrolysis: Pb 2+ ions gain electrons at the cathode and become Pb atoms. Br - ions lose electrons at the anode and become Br atoms, which pair up to form Br 2 molecules.

Explanation:

hope it helps

Answer:

b

Explanation:

THE ANSWER B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:

moon

Explanation:

Answer:

Explanation:

its the moon. the moon covers the sun causing it to be completely blakened out. and if thats not right then lifes a lie cuz i got blinded pretty bad in one of my eyes for looking at it with it

Answer:

lubricating oil

Explanation:

Of the given fractions, lubricating oil has the highest boiling point of all.

It is a petroleum fraction used for lubrication and reducing friction between moving parts of machineries .

Answer:

No

Explanation:

H2O > H2 + O2

There is an uneven amount of oxygen on the right side

it will look like this balanced:

2H2O(l) > 2H2(g) + O2(g)

Answer:

C

Explanation:

Answer:

Fractional distillation

Explanation:

Crude oil, also known as petroleum, is a naturally occurring substance found in the Earth's crust. It is a mixture of different useful substances. These substances are separated from one another based on their individual boiling points in a process called FRACTIONAL DISTILLATION.

The process of fractional distillation entails the application of heat to the crude oil. The different fractions evaporate and condense in the fractionating column depending on their boiling point. The hydrocarbon substances separated are called fractions, and they include bitumen, diesel, kerosene, gasoline, natural gas etc. Therefore, before we can use gasoline (petrol) in our cars, the crude oil needs to be separated into separate products like plastics and ink. This process is called FRACTIONAL DISTILLATION.

Answer:

The electron dot diagram of helium has six fewer dots than the electron dot diagram of neon.

Explanation:

Answer:

Answer:

The electron dot diagram of helium has six fewer dots than the electron dot diagram of neon.

Explanation:

Explanation:

Answer: what is it I need help

Explanation: step by step

Answer:

First you need to get liters to moles to mass. So 14.8 times 1 mol over 22.4 times the mole ratio 1:3 times molar mass over one mol. There you have it. Sorry I haven’t solved it yet and don’t know the right answer as soon as I do know I’ll edit this and say the correct answer

Explanation:

Answer:

2.7 x 10^-19 J

Explanation:

The formula needed for this problem is

E = hν

where E = energy, h = Planck's constant = 6.626x10^-34 and ν is the frequency

c = λν

where c = speed of light = 3x10^8, and λ = wavelength

3x10^8 = 7.35x10^-7 . ν

ν = 4.08 x 10^14 Hz

E = 6.626x10^-34 . 4.08x10^14 = 2.7 x 10^-19 J

Answer:

1.12x10²³ atoms of F

Explanation:

A molecule is a group of 2 or 3 atoms that are bonded by electrostatic charges.

In 1 molecule of MgF2 there are 2 atoms of fluorine and 1 atom of magnesium.

Thus, there are 2 atoms of fluorine per molecule of MgF2. In 5.6x10²² molecules:

5.6x10²² molecules MgF2 * (2 atoms Fluorine / 1 molecule MgF2) =

Answer:

We can use a fan, divide the number of times that fan spins by the time it takes and the speed is obtained

Answer:

you did not show the options

Explanation:

I am unsure if this is the correct question, but I think these are the answer choices that are part of this question:

O diamond

O sugar

O rubber

O salt (NaCl)

O wood

O ice

O flour

The answers to this question are diamond, sugar, salt (NaCl), and ice (1st, 2nd, 4th, and 6th options).

Answer:

P₂ = 2 atm

Explanation:

Given data:

Initial volume = 10.0 L

Initial pressure = 4.0 atm

Final volume = 20.0 L

Final pressure = ?

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

4.0 atm × 10.0 L = P₂ × 20.0 L

P₂ = 40.0  atm. L/ 20.0 L

P₂ = 2 atm

Answer:

Electronic Geometry is Linear

Molecular Geometry is Linear

Polarity of HBr is indeed a polar molecule

Intermolecular Forces of HBr is a Dipole-Dipole Forces

Compound Name : Hydrogen Bromide

Explanation:

It is linear because it only has 2 atom that is obvious forming a linear species with bond angle of 180°

It is polar molecule because Br has higher electronegativity than hydrogen therefore produce a difference in electronegativity that proves HBr to be a polar molecule.

Intermolecular Forces is dipole-dipole because there is a dipole moment due to the difference in electronegativity with Br having the negative partial charge -δ and H having the positive partial charge +δ.

Answer:

hyrdrobormic acid

Explanation:

Answer:

glucose

Explanation:

Chemical energy is stored in the bonds that hold the molecule together. ADP can be recycled into ATP when more energy becomes available. The energy to make ATP comes from glucose. Cells convert glucose to ATP in a process called cellular respiration.

The chemical energy to produce ATP comes from the BREAKDOWN of carbon-based molecules into smaller molecules.

In conclusion, the chemical energy to produce ATP comes from the BREAKDOWN of carbon-based molecules into smaller molecules.

Learn more in:

https://brainly.com/question/10253095

1. density of liquid: 1 g/cm³

2. density of unknown liquid: 2.7 g/cm³

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]

ρ = density  

m = mass  

v = volume  

1

.[tex]\tt \dfrac{156-56}{100}=1~g/cm^3[/tex]

2.[tex]\tt \dfrac{27}{(\dfrac{30-20}{1}) }=2.7~g/cm^3[/tex]

Answer:

flooding throughout North America

Explanation:

An El Niño condition occurs when surface water in the equatorial Pacific becomes warmer than average and east winds blow weaker than normal. The opposite condition is called La Niña. During this phase of ENSO, the water is cooler than normal and the east winds are stronger. El Niños typically occur every 3 to 5 years.

Hope this helps

Answer:

warm water moving towards the coast of South America

Answer:

Percent yield = 88%

Explanation:

Given data:

Mass of C₇H₆O₃ = 200.0 g

Actual yield of aspirin = 231 g

Percent yield  = ?

Solution:

Chemical equation:

C₇H₆O₃  + C₄H₆O₃      →       C₉H₈O₄ + C₂H₄O₂

Number of  moles of aspirin:

Number of moles = mass/molar mass

Number of moles = 200.0 g/ 138.12 g/mol

Number of moles =  1.45 mol

Now we will compare the moles of aspirin with C₇H₆O₃.

                          C₇H₆O₃           :           C₉H₈O₄

                               1                 :               1

                            1.45              :             1.45

Theoretical yield of aspirin:

Mass = number of moles × molar mass

Mass = 1.45 g × 180.158 g/mol

Mass = 261.23 g

Percent yield:

Percent yield =( actual yield / theoretical yield )× 100

Percent yield =  (231 g/ 261.23 g)× 100

Percent yield = 0.88 × 100

Percent yield = 88%

Answer:

2,5

Explanation:

Solution at attachment box

Producted or consumed material proportional with coefficient of material at reax.

Answer:

The nonpolar substance has a lower boiling point than the polar substance

Explanation:

What causes polarity is how the electrons of the molecules in each substance are being shared. To have a polar substance/molecule it means that the electrons are not equally shared and when there is non-polar molecule we have that the electrons are shared evenly.

For instance, let's say we have a chemical Compound AB. If AB is polar it means that the electrons here are not evenly distributed, thus we will have one of the molecules to be positive and the other to be negative, say A^- and B^- = A^-B^-. Hence, they have polar bonds.

The bonds in polar substance are stronger than the one in non polar substance thus we have lower boiling point in non-polar substance(the bonds are held together by weak forces) and a high boiling point in a polar substance.

Answer:

B.) The nonpolar substance has a lower boiling point than the polar substance

Explanation:

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