Which letter in the rock cycle diagram represents metamorphic rock?
A)
A.
B)
B.
)
D.
D)
E.

Answer:

A. Autotrophs

Explanation:

an autotroph, def an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.

humans and other mammals, plants, and a select few other things

Answer:

https://sensorex.com/ph-calculator/

Explanation:

go to this link and then scroll down a little bit and then you'll find the answer

Answer:

The coefficient of Fe₂O₃ is 1

Explanation:

__Fe₂O₃ + 3H₂ —> 2Fe + 3H₂O

To know the correct coefficient of Fe₂O₃, we shall balanced the equation. This can be obtained as follow:

Fe₂O₃ + H₂ —> Fe + H₂O

There are 2 atoms of Fe on the left side and 1 atom on right side. It can be balance by writing 2 before Fe as shown below:

Fe₂O₃ + H₂ —> 2Fe + H₂O

There are 3 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 3 before H₂O as shown below:

Fe₂O₃ + H₂ —> 2Fe + 3H₂O

There are 2 atoms of H on the left side and 6 atoms on the right side. It can be balance by writing 3 before H₂ as shown below:

Fe₂O₃ + 3H₂ —> 2Fe + 3H₂O

Now, the equation is balanced.

Thus, the coefficient of Fe₂O₃ is 1

Answer:

[tex]1 \: litre \: solution \: contains \: 3 \: moles \\ 5 \: litres \: will \: contain \: \frac{(5 \times 3)}{1} \: moles \\ = 15 \: moles \: of \: solute[/tex]

Answer:

milky way

Explanation:

According to molar concentration, the molarity of the solution is 2.55 M.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

Substituting values in the given second formula, molarity=0.0255/0.010=2.55 M.

Thus, the molar concentration of the solution is 2.55 M.

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Answer:

514.8 grams of H₂O would be produced.

Explanation:

The balanced reaction is:

CH₄ + 2 O₂ → CO₂ + 2 H₂O

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles participate in the reaction:

Being the molar mass of each compound:

By stoichiometry, the following amounts of mass participate in the reaction:

You can apply the following rule of three: if 1 mole of methane produces 36 grams of water, 14.3 moles of methane produces how much mass of water?

[tex]mass of water=\frac{14.3 moles of methane*36 grams of water}{1 mole of methane}[/tex]

mass of water= 514.8 grams

514.8 grams of H₂O would be produced.

Answer:

4.5L of gas are produced

Explanation:

Based on the reaction:

Zn + H2SO4 → ZnSO4 + H2(g)

Where 1 mole of Zn reacts with 1 mole of sulfuric acid to produce 1 mole of H2, the gas

To solve this question we must find the moles of each reactant in order to find limiting reactant and, thus, the moles of H2 produced. Then using PV=nRT we can find the volume of the gas:

Moles Zn -Molar mass: 65.38g/mol-

13g * (1mol / 65.38g) = 0.20 moles Zn

Moles H2SO4 -Molar mass: 98g/mol-

400g * 10% = 40g H2SO4 * (1mol / 98g) = 0.41 moles H2SO4

As the ratio of the reaction is 1:1, the limiting reactant is Zn and the moles produced of H2 are 0.20 moles

Using PV = nRT; V = nRT/ P

Where V is the volume of the gas

n are the moles = 0.20 moles

R is gas constant = 0.082atmL/molK

T is absolute temperature = 273.15K at STP

P is pressure = 1atm at STP

V = 0.20mol*0.082atmL/molK*273.15K / 1atm

V = 4.5L of gas are produced

Answer:

Equation 2, because K being more reactive, exchanges position with Pb in PbNO3.

Explanation:

Hello there!

In this case, according to the given reactions, it is possible to realize that according to the reactivity series, since K is is group 1A of alkali metals, we infer it is by far more reactive than magnesium, for that reason last two choices can be easily discarded. Now, considering equation 2, it would be necessary to complete it to figure out the correct option:

[tex]Pb(NO_3)_2 + KI \rightarrow PbI_2+KNO_3[/tex]

Whereas it can be seen that potassium exchanges position with Pb according to the double displacement reaction; therefore, the correct answer is "Equation 2, because K being more reactive, exchanges position with Pb in PbNO3".

Best regards!

Answer:

Volume of air is [tex]60[/tex] cubic meter

Mass of air is [tex]72.246[/tex] Kilogram

Explanation:

As air occupies the volume of the container in which it is kept. The volume of air here in this case will be equal to the volume of the room.

Volume of the room = length * breadth * height

Volume of the room = [tex]4*5*3 = 60[/tex] cubic meter.

Volume of air is also [tex]60[/tex] cubic meter.

Density of air at 20 degrees C [tex]= 1.2041[/tex] kg/cu.m

Mass of air

Volume * density

[tex]60 * 1.2041 = 72.246[/tex] kilogram

Volume of air is [tex]60[/tex] cubic meter

Mass of air is [tex]72.246[/tex] Kilogram

Answer:

c) HOCH2CH2CH2OH

Explanation:

Hope this helps

Answer:

cold or ice?

Explanation:

have a good day.

Answer:

I believe b, dynamic equilibrium

Explanation:

Answer:  molecular weight of CUSO4 or grams. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CUSO4, or 346.10221 grams. Note that rounding errors may occur, so always check the results.

Explanation:

Answer:

2.5 times

Explanation:

Jupiter's mass is 2.5 times that of all the other planets in the Solar System combined—this is so massive that its barycenter with the Sun lies beyond the Sun's surface at 1.068 solar radii from the Sun's center.

Answer:

ap.ex predat0rs

Explanation:

Answer:6

Explanation:

The number of atoms in the product will be equal to six.

A chemical equation represents a chemical reaction in terms of the chemical symbols of the substances. A chemical equation of a reaction posses of participated reactants, formed products, and an arrow to indicate the direction of the chemical reaction.

The chemical equation of a reaction in which the number of atoms of each element is equal on either side of the equation is known as a balanced chemical equation.

The law of conservation of mass is always followed by a balancing of a chemical equation. By following this law, the total mass of all the elements on the reactant side will be equal to the total mass of all elements on the product side in a balanced chemical equation.

Therefore, the number of hydrogen atoms on the reactant side is equal to 6 (4+2) and the same number of atoms will be on the product side.

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Answer:

Dictionary

Definitions from Oxford Languages

Search for a word

significance

/sɪɡˈnɪfɪk(ə)ns/

Learn to pronounce

noun

1.

the quality of being worthy of attention; importance.

"adolescent education was felt to be a social issue of some significance"

Similar:

importance

import

noteworthiness

consequence

substance

seriousness

gravity

weight

weightiness

magnitude

moment

momentousness

memorableness

unforgettableness

pronounced nature

remarkableness

outstanding nature

markedness

obviousness

conspicuousness

strikingness

distinction

impressiveness

uncommonness

unusualness

rarity

extraordinariness

exceptionalness

specialness

cruciality

Opposite:

insignificance

2.

the meaning to be found in words or events.

"the significance of what was happening was clearer to me than to her"

Similar:

meaning

sense

signification

import

thrust

drift

gist

burden

theme

implication

tenor

message

essence

substance

relevance

Answer:

B. Particles of matter have spaces between them.

Explanation:

The particle nature model of matter is an model used to explain the properties and nature of matter. The statements of the particle nature model of matter are as follows :

1. Matter is made of small particles of atoms or molecules.

2. The particles of matter have space between them. The spaces between the particles are least in solids as they are closely packed together but are greatest in gases whose particles are far apart from each other.

3. The particles of matter are in constant motion at all times. Solids particles are not free to move due to strong molecular forces between the particles, but are constantly vibrating in their mean positions. Liquid particles free to move due to lesser molecular forces while gas molecules which have negligible intermolecular forces have the greatest ability to move.

4. The particles of matter are attracted to each other by intermolecular forces. These forces are greatest in solids and least in gases.

The correct option is B.

Answer:

B

Explanation:

Answer:

a

Explanation:

Answer:

The correct answer is - D. Red, green, violet​.

Explanation:

Visible light is the spectrum of light that can be seen by the naked eyes of humans without any equipment. This spectrum has various frequency light that helps us see things in color. The frequency of light ranges between seven different colors in which violet has the highest frequency and red has the lowest.

The different frequencies are as follows:

color               frequency

red (limit) 1.77

red                  1.91

orange  2.06

yellow  2.14

green  2.25

cyan  2.48

blue          2.75

violet (limit) 3.10

On this basis of this the group of colors of the visible light is listed from

lowest to the highest frequency - Red, green, violet​

Answer:

= -4a+22b

Explanation:

i hope this helps :)

Answer:

12a-16a =-4a

26b -4b =22b

the final answer is-4a +22b

Answer:

pH = 1.62

Explanation:

We can solve this problem using Henderson-Hasselbach's equation:

Where

Now we convert 132.8 g of NaC₇H₅O₂ into moles, using its molar mass:

Then we calculate [NaC₇H₅O₂]:

Now we can proceed to calculate the pH of the solution:

Answer:

it's a day I think so ........

Answer:

Lunar cycle

Explanation:

Year is the amount of time for the Earth to rotate a complete circle around the sun.

Lunar cycle (moon phases) is the rotation of the Moon around the Earth.

Day is the time for the Earth to rotate on its own axis completely.

Solar cycle is the changes that the sun's electric field goes through about every 11 years.