yall help, i missed like a week
some of them are wrong, I need all of 1 and 2​

Since the ethanol has a density of 0.800 g/mL, the mass of the ethanol is 180 grams.

Given the following data:

Volume of ethanol = 225 mL

Density of lead ball = 0.800 g/mL.

To find the mass of the ethanol;

Density can be defined as mass all over the volume of an object.

Mathematically, the density of a substance is given by the formula;

Density = Mass/Volume

Making mass the subject of formula, we have;

Mass = Density x Volume

Substituting the given parameters into the formula, we have;

Mass of ethanol = 180 grams.

Answer:

I think that it it correctly balanced that is my opinion and, because  the way it is set up, that the answer will tell you weather or not it is correctly balanced or not.

Evaluating the number of atoms of each element on the product and reactant side, we can conclude that the student's equation isn't balanced.

Given the chemical reaction :

[tex] Al_{4}C_{3} + 6H_{2}O ---> 3CH_{4} + 4Al(OH)_{3} [/tex]

For a balanced equation, the number of atoms of each element in the product side must be equal to that on the reactant side.

Number of hydrogen :

Reactant side = (6 × 2) = 12

Product side = (6 × 2) + (6 × 2) = 12 + 24 = 24

Product side ≠ reactant side ; Hence, the equation isn't balanced

The balanced equation for the reaction goes thus :

[tex] Al_{4}C_{3} + 12H_{2}O ---> 3CH_{4} + 4Al(OH)_{3} [/tex]

Reactant side :

Al = 4

H = (12 × 2) = 24

O = 12

C = 3

Product side :

H = (6 × 2) + (6 × 2) = 12 + 24 = 24

Al = 4

O = 4 × 3 = 12

C = 3

Therefore, the student's equation isn't balanced, the balanced version of the equation has been given .

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Answer:

Photosynthesis

Explanation:

Photosynthesis is the process in which plants collect radiant energy (from the Sun) and transform it into chemical energy.

Answer:

Photosynthesis is the process in which plants collect radiant energy (from the Sun) and transform it into chemical energy.

Explanation:

BECAUSE I SAID, btw its right i promise

Answer:

c. valence electrons

Explanation:

Answer:

All secondary consumers will die because they will lose their food source

A container has 1.50 moles of hydrofluoric acid molecules, a deadly acid that can kill someone in minutes molecules are 9.03 × 10 ²³ molecules.

Moles are the smallest unit of a molecule that participates in the formation of the molecules to compete in a reaction and the value will be equal to the Avogadro number 2.303 × 10 ²³.

To calculate the total number of molecules the value of one mole is 2.303 × 10 ²³. so, for 1.50 moles of hydrofluoric acid will be,

                         1.50 moles = 2.303 × 10 ²³.moles

                  hydrofluoric acid molecules = 1.50 × 2.303 × 10 ²³

                    hydrofluoric acid molecules = 9.03 × 10 ²³ molecules.

Therefore,  9.03 × 10 ²³ molecules are present in the container has 1.50 moles of hydrofluoric acid molecules, a deadly acid that can kill someone.

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Answer:

0.55 atm

Explanation:

According to Dalton's law of partial pressures,

The total pressure is the summation of the partial pressures of individual gases in a sample of non-reactive gases.

Since Neon and Argon are noble gases, they do not react with each other. So we can apply Dalton's partial pressure law.

P total = P Ar + P Ne

2.39 atm = P Ar+ 1.84 atm

P Ar = 2.39 atm - 1.84 atm

       = 0.55 atm

According to the Dalton's law of partial  pressure the partial pressure of the argon is 0.55 atm.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

In this case, pressure of gas argon is obtained by subtracting pressure of gas neon  from the total pressure ,that is 2.39-1.84=0.55 atmosphere.

Thus ,the partial pressure of gas  argon in atmosphere is 0.55 atmosphere.

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Answer:

2 homogenous mixture

Explanation:

Answer:

The one at the top: cuticle

The highest line on the right side: palisade layer

The third line on the left: chloroplast

The line near phloem: vein

The line at the bottom: stomata

Entirely on the attachment.

Explanation:

No need.

hope it helps

Answer:

A

Explanation:

god loves you

Answer:it’s C

Explanation:

A distant luminous object travels rapidly away from an observer.

Redshift is observed when a distant luminous object travels rapidly towards an observer. Thus option C is correct.

Luminous object is defined as the sun is an example of a luminous object, whereas a non-luminous object is one that cannot create light.

It is also defined as objects that can generate their own light energy.

Non luminous object is defined as one that does not generate its own light but can reflect light from other sources.

It can also defined as object which do not generate their own light.

Redshift is defined as when the wavelength of the light is extended, it seems to be shifted towards the red section of the spectrum.

Thus, redshift is observed when a distant luminous object travels rapidly towards an observer. Thus option C is correct.

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Explanation:

The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.

Answer:

: \large \boldsymbol {\rm x > 5 \ or \ x\in (5\ ; \ \infty ) }x>5 or x∈(5 ; ∞)

Step-by-step explanation:

\begin{gathered}\large \boldsymbol {} \displaystyle -2(3x+2) > -8x+6 \\\\ -6x-4 > -8x+6 \\\\ 8x-6x=6+4 \\\\ 2x > 10 \\\\ x > 5 \ or \ x\in (5\ ; \ \infty )\end{gathered}

−2(3x+2)>−8x+6

−6x−4>−8x+6

8x−6x=6+4

2x>10

x>5 or x∈(5 ; ∞)

Answer:

One metal causes a chronic effect, compared to the other

Explanation:

because the question only said ONE is the same, didn't they? so that would mean that not all the metals are the same for both towns

Answer:

Hurricanes occur when ocean water warms during the spring, summer and early fall.

Explanation:

Warm air just above the water’s surface rises. The rising warm air creates a reduction in pressure at the surface, what meteorologists call a low-pressure area. Because nearby air is at a higher pressure, it will flow into the low-pressure zone.

https://www.sidmartinbio.org/how-does-a-high-pressure-system-affect-a-hurricane/

Answer:

Explanation:

By observing chemical reactions, we are able to understand and explain how the natural world works. Chemical reactions turn food into fuel for your body, make fireworks explode, cause food to change when it is cooked, make soap remove grime, and much more.

Answer: A

Explanation: I just answered mine

Answer:

1 is protons and neutrons

2 is electrons and protons

3 Is protons

Answer:

a

Explanation:

Answer:

pyruvic acid changes to alcohol and carbon dioxide.

Explanation:

In lactic acid fermentation, pyruvic acid from glycolysis changes to lactic acid. This type of fermentation is carried out by the bacteria in yogurt, and by your own muscle cells.

I HOPE THIS HELPS!!!!!

Alcohol and carbon dioxide are produced when pyruvic acid is fermented. The chemical process in which molecules break down is called as fermentation.

Fermentation is an anaerobic chemical process that breaks down molecules like glucose. Pyruvic acid undergoes fermentation to produced lactic acid.

More specifically, fermentation is the foaming that happens during the creation of wine and beer, a procedure that has been around for at least 10,000 years.

Pyruvic acid produced during glycolysis transforms into lactic acid during lactic acid fermentation. Alcohol and carbon dioxide are produced when pyruvic acid is fermented.

Thus, the pyruvic acid when change into lactic acid fermentation obtained alcohol and carbon dioxide.

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Considering the definition of percent by volume concentration, the correct answer is option D: the percent by volume concentration of the solution is 1.50%

Percent by volume concentration is a measure of concentration that indicates the volume of solute per 100 volume units of the solution. This value is calculated by dividing the volume of the solute by the total volume of the solution, and multiplying by 100 to express it as a percentage:

[tex]percent by volume concentration=\frac{volume of solute}{total volume of the solution}x100[/tex]

In this case, you know:

Replacing in the definition of percent by volume concentration:

[tex]percent by volume concentration=\frac{3 mL}{200 mL}x100[/tex]

Solving:

percent by volume concentration=0.015×100

percent by volume concentration=1.50

Finally, the correct answer is option D: the percent by volume concentration of the solution is 1.50%

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There are many different ways that cells can connect to each other. The three main ways for cells to connect with each other are: gap junctions, tight junctions, and desmosomes. These types of junctions have different purposes, and are found in different places.

Answer:

MgCl2 + H2O

Explanation:

Answer:

b

Explanation:

jskekekeoeodofkkdkwkwllelwwlww

Answer:

Elements in which the d-sublevel is being filled have the properties of metals

Elements in which the d-sublevel is being filled have the properties of;

transition metals.

In quantum theory the sublevel is an energy level. Now, the d-sublevel in atomic configuration has 5 orbitals and as such can contain a maximum of 10 electrons.

Now, this d-sublevel is used primarily by elements called "transition elements" as they are also called d-block elements.

However, these transition elements are also called transition metals because all the transition elements possess properties of metals generally.

In conclusion, elements in which the d-sublevel is being filled have the properties of transition metals.

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oh its a Chlorine isn't it....

it's electronic configuration is

2,8,7

so to make it 8 in its outermost shell it should gain 1 electron...

Many nitrogen and carbon atoms can be found in the structure of a heterocyclic molecule called xanthine, which is present in many biological systems.

The development of a sigma bond between these atoms is an essential component of its binding. A special example is the sigma bond between the nitrogen atom and the neighboring carbon atom. In the context of this sigma bond, the hybridization state of nitrogen can be either [tex]\rm sp^2[/tex]or [tex]\rm sp^3[/tex], and the hybridization state of carbon can be [tex]\rm sp^3[/tex]. A sigma bond is formed when the hybrid orbitals of carbon and nitrogen, which are each [tex]\rm sp^2[/tex] hybridized and [tex]\rm sp^3[/tex] hybridized, overlap. A strong covalent bond can develop when the [tex]\rm sp^2[/tex] hybrid orbitals of nitrogen and carbon line up. This allows electron sharing.

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