PLEASE HELP ASAP!!!!!

Which statements explain why rocks weather at different rates? Check all that apply.


Softer, porous, or more permeable rocks weather faster than harder rocks.


Rocks in warmer climates weather faster than rocks in colder climates.


Rocks with minerals that dissolve slowly in water will weather faster than other rocks.


The more water present, the faster the rate of weathering.


Rocks that are more permeable are more resistant to weathering.

Answer:

20C is warmer.

Explanation:

20C is 68 fehrenheit

20K is -423.67 fahrenheit

In the decomposition reaction, the reactants split into products. The mass of carbonic acid that will be produced from the decomposition of sodium bicarbonate is 1.67 gm.

Mass is the product of the moles and the molar mass of the substance. It is the weight present of the substance in reaction and is calculated in grams.

The decomposition reaction can be shown as,

[tex]\rm 2NaHCO_{3} \rightarrow Na_{2}CO_{3} + H_{2}CO_{3}[/tex]

From the reaction, it can be seen that 2 moles of sodium bicarbonate decompose to produce 1 mole each of carbonic acid and sodium carbonate.

Moles of sodium carbonate is calculated to estimate the mass of carbonic acid:

[tex]\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass}\\\\&= \dfrac{2.86}{105.99}\\\\&= 0.02698\;\rm moles\end{aligned}[/tex]

Mass of carbonic acid is calculated as:

[tex]\begin{aligned} \rm mass &= \rm moles \times molar\; mass\\\\&= 0.02698 \times 62.03 \\\\&= 1.67 \;\rm gm\end{aligned}[/tex]

Therefore, 1.67 gm of carbonic acid will be produced.

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Answer:

Explanation:

If the gas pops when the top of the test tube is placed close to a flame it is hydrogen,

If it re-ignites a glowing splint it's oxygen.

Otherwise the gas is nitrogen.

Answer: Options #3: Tin and Hydrogen

Explanation:

Tin has 50 protons

Hydrogen has 1 proton

50 + 1 = 51 protons

♡ The Question/Task(s)! ♡

✦ || Which two elements, in looking at their atoms, have a total of 51 protons between them?

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♡ The Answer(s)! ♡

✦ || The answer is, "Tin and Hydrogen"!

I apologize in advance if the answer is incorrect! ♡

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♡ The Explanation(s)/Step-By-Step! ♡

✦ || If you combine each of the number of protons, Magnesium and Aluminum would contain 25 total! Magnesium consists of 12 protons, while Aluminum has 13. If you combine the number of protons for Lithium and Scandium, the result would be 24 total! Lithium contains 3 protons, while Scandium has 21. If you add the total number of protons between Magnesium, Aluminum, Lithium, and Scandium, the answer would be 49! If you combine the number of protons for Tin and Hydrogen, however, you would receive the total number of 51! Tin consists of 50 protons, while Hydrogen only has 1, therefore, the answer is Tin and Hydrogen!

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The acid ionization constant (ka) of an unknown acid if a 0.030M solution of it has a pH of 2.946 is 4.8×10⁻⁵.

Relation between the pH and [H⁺] will be shown as:

[H⁺] = [tex]10^{-pH}[/tex]

Given that pH of solution = 2.946

[H⁺] = [tex]10^{-2.946}[/tex] = 0.00113 = 0.0012

Let the ICE table for the unknown acid HA will be:

                                   HA    ⇄    H⁺   +     A⁻

Initial:                          0.03          0           0

Change:                   -0.0012    0.0012   0.0012

Equilibrium:        0.03-0.0012  0.0012   0.0012

Acid dissociation constant will be calculated as:
Ka = [0.0012][0.0012] / [0.03-0.0012]

Value of 0.0012 is very small as compared to the 0.03, so the equation becomes

Ka = (0.0012)² / 0.03 = 0.000048 = 4.8×10⁻⁵

Hence value of Ka is 4.8×10⁻⁵.

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Answer:

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)

88.0g ………………….. ………………………..?g

88.0g C3H8 x (1 mol C3H8 / 44.0g C3H8) x (4 mol H2O / 1 mol C3H8) x (18.0g H2O / 1 mol H2O) = 144g H2O

2CaCO3 =2CaO+CO2 is balanced but we can change 2CaCO =2CaO3+C03

Answer:

10.72 %

Explanation:

17.9/(17.9+149)=.1072   =   10.72%

The statement that bronsted - lowry model can apply to bases that do not contain hydroxide ions is true.

The Bronsted - Lowry theory, also known as the proton theory of acids and bases, is a theory developed independently by chemist Johannes Nicolaus Bronsted and English chemist Thomas Lowry in 1923.

The theory states that as acid is a substance that can donate electrons and bases are those which can accept electrons.

Thus, the statement that bronsted - lowry model can apply to bases that do not contain hydroxide ions is true.

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Joe Viskocil is not a fan of big explosions because it is is either lopsided or squashed and not spherical.

This is defined as a sudden, violent burst of energy which is associated with a rapid expansion of volume.

Joe Viskocil doesn't like big explosions because it is is either lopsided or squashed. and capable of creating more damage.

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Answer: C

Explanation:

The mass of the solute is given by the moles and the molar mass of that substance. In the 2.50 M solution, 249 gm of KI is present.

Molarity and the volume of the solution can be used to give the moles of the solute dissolved in the solution and can be further used to give the mass of the solute.

Given,

Molarity of KI = 2.50M

Volume of potassium iodide solution = 0.6 L

Molar mass of KI = 166

The formula of molarity is given as:

Molarity = moles ÷ volume

The formula of moles is given as:

Moles = mass ÷ molar mass

Substituting moles into molarity as:

M = mass ÷ molar mass × Volume

mass = 2.50 × 0.6 × 166

= 249 gms

Therefore, 249 gms is the mass of KI.

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249 grams of potassium iodide (KI) should be used to prepare 0.600 of a 2.50 M solution of potassium iodide.

Molarity (M) is the amount of a substance in a certain volume of solution.

Molarity is defined as the moles of a solute per litres of a solution.

Molarity is also known as the molar concentration of a solution.

Given data:

Molarity of the solution = 2.50 M

Volume of solution = 0.600 L

Molarity =  [tex]\frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}[/tex]

Now putting the value in the equation:

2.50 M =  [tex]\frac{Moles \;solute}{ 0.600 L}[/tex]

Moles of solute = 1.5

Moles  = [tex]\frac{mass}{molar \;mass}[/tex]

1.5  = [tex]\frac{mass}{166.0028 }[/tex]

Mass  = 249 gram.

Hence, 249 grams of potassium iodide (KI) should be used to prepare 0.600 of a 2.50 M solution of potassium iodide.

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The resultant moles of nitrogen gas that are present in the container is 2.96 moles.

Mass of any substance will be converted into moles by using the below equation as:

n = W/M, where

From the ideal gas equation of gas we know that moles and volume is directly proportional to each other and for this question equation becomes,

V₁/n₁ = V₂/n₂, where

On putting all values, we get

n₂ = (5L)(1.78mol) / (3L) = 2.96 moles

Hence required moles of nitrogen gas are 2.96.

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Answer:

the name is Carbon monoxide.

Good luck.

Answer:

In voltaic cells, oxidation occurs at an anode (-), reduction at a cathode (+), and electrons flow from anode to cathode. In electrolytic cells, oxidation occurs at an anode, reduction occurs at a cathode, and electrons flow from anode to cathode.

Explanation:

Answer:

Extinction.

Explanation:

Animals living off coral would die with no food to eat ruining millions of food chains

Answer:

The Coral reefs provide protection against flooding and the erosion of coastlines. With them gone, there will be rapid erosion of coastlines and many small island countries might even vanish from the world map

Explanation:

Hope this helps Have a great day!!!!!

Answer: …

Explanation:

This particular alkane is distinguished from all the other alknes by reason of the shape of the alkane.

The term alkanes has to do compounds that have only a carbon to carbon single bond. We have to note that alknaes can be cyclic, linear or branched. All this types of alkanes are easily recognized by shape.

This particular alkane is distinguished from all the other alknes by reason of the shape of the alkane.

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Answer: A) The shape

Explanation:

edge 22 - took the quiz and got it correct

hope it helps <3

The state of the compounds are:

Na₂co₃- basic salt

NaHC₂O₄- acidic

FeCl₃- acidic

NH₄br- acidic

KClO₄- neutral

The state of the compound is its acidity, basicity, and neutrality. The compounds are the mixture of opposite elements.

Thus, the state of the compounds are:

Na₂co₃- basic salt

NaHC₂O₄- acidic

FeCl₃- acidic

NH₄br- acidic

KClO₄- neutral

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Na₂CO₃, NaHC₂O₄ and FeCl₃ are basic, acidic and acidic respectively.

pH scale is used to define the nature of a substance as acidic, basic or neutral. Value from 0 to 6.9 shows the acidity, 7 shows the neutrality and from 7.1 to 14 shows the basicity.

Hence, Na₂CO₃, NaHC₂O₄ and, FeCl₃ are basic, acidic and acidic respectively.

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The number of mole of HCl required to neutralize all 0.05 mole of Ca(OH)₂ is 0.1 mole

Ca(OH)₂ + 2HCl —> CaCl₂ + 2H₂O

From the balanced equation above,

1 mole of Ca(OH)₂ required 2 moles of HCl

From the balanced equation above,

1 mole of Ca(OH)₂ required 2 moles of HCl

Therefore,

0.05 mole of Ca(OH)₂ will require = 0.05 × 2 = 0.1 mole of HCl

Thus, 0.1 mole of HCl is needed for the reaction

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Answer:

Heterogeneous

Explanation:

Explanation:

Here is the solution...hope it helps:)

The grams of nitrogen gas inhaled are 0.0322816 moles.

Mass is the quantity of matter of a physical body.

No. of molecule inhaled by a person is [tex]9. 72 \times 10^2^1[/tex]

Nitrogen is a diatomic molecule, so it will contain 2 atoms.

Number of nitrogen atoms

[tex]9. 72 \times 10^2^1 \times 2 = 19.44 \times 10^2^1[/tex]

1 mole contain = [tex]6.022 \times 10^2^3[/tex]

So, number of moles of nitrogen

[tex]\dfrac{9. 72 \times 10^2^1}{6.022 \times 10^2^3} = 3.22816 \times 10^-^2\\\\= 0.0322816 \;moles[/tex]

Thus, the grams of nitrogen gas inhaled are 0.0322816 moles.

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Answer:

Option #1: shiny solid, conducts heat and electricity, easily bends

Explanation:

alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

These physical properties of group 2 elements are: low density (mass over volume) low melting points (except beryllium) low boiling points (except beryllium)

♡ The Question/Task(s)! ♡

✦ || An element in Group 2 of the periodic table likely has which characteristics?

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♡ The Answer(s)! ♡

✦ || The answer is, "Shiny solid, conducts heat and electricity, easily bends"!

I apologize in advance if the answer is incorrect! ♡

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♡ The Explanation(s)/Step-By-Step! ♡

✦ || The elements in Group 2 of the periodic table consist of malleable metals! The elements have a soft metallic texture that can be shaped, and can conduct a source of both electricity and heat!

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Climate change refers to long-term shifts in temperatures and weather patterns. These shifts may be natural, such as through variations in the solar cycle. But since the 1800s, human activities have been the main driver of climate change, primarily due to burning fossil fuels like coal, oil, and gas.

Burning fossil fuels generates greenhouse gas emissions that act like a blanket wrapped around the Earth, trapping the sun’s heat and raising temperatures.

Examples of greenhouse gas emissions that are causing climate change include carbon dioxide and methane. These come from using gasoline for driving a car or coal for heating a building, for example. Clearing land and forests can also release carbon dioxide. Landfills for garbage are a major source of methane emissions. Energy, industry, transport, buildings, agriculture, and land use are among the main emitters.

Nowadays the ice is melting more rapidly, this can cause a rise in water/ocean. The forests are drying up faster, species populations are declining rapidly. So we must take action before it is too late.

Thank you.

stay safe

HI does not have any hydrogen atoms, it cannot exhibit hydrogen bonding instead HI is a heteronuclear diatomic molecule show dipole-dipole intermolecular force.

The forces of attraction or repulsion among the particles of atoms or molecules in either solid, liquid, or gaseous state For example covalent bond.

These forces are weaker than Intramolecular Forces and the strength of the intermolecular forces of attraction explain the type of interaction that will occur between two molecules.

Intermolecular forces involve in both structural features and physical properties of the substance.

This force seen in the  same molecule or a polyatomic ion affect the chemical properties of the substance.

Water is the best studied example of Intermolecular forces of attraction.

Different types of intermolecular forces are Dipole-dipole interactions, Dipole-induced dipole,  Ion-dipole interactions, Ion-induced dipole interactions, Dispersion forces, Hydrogen bonding

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Answer

34g

Explanation:

equation:2H2O2 ------------ 2H2O + O2

mole ratio:  2:               2      :     1

RMM of O2 - (16*2) = 32

RFM of H2O2 - (1*2) + (16*2) = 34

1 MOLE O2 - 32g

     ?            -  1.6g

1.6/32 = 0.5 MOLES

0.5*2 = 1 MOLE OF H2O2

I*34 = 34 g

Answer:

solid liquid and gas

Explanation:

Answer:

Heat gains or losses result in changes in temperature, changes in state or the performance of work. Heat is a transfer of energy. When gained or lost by an object, there will be corresponding energy changes within that object.

Answer:

102.8312649 --> 103%

The marbles there must not be any hear going anywhere else. If any heat energy warmed up anything else in the system then that is heat that did not go to the marbles.

[tex]\frac{Answer D}{Answer E} x 100 = ???[/tex]

(This is the equasion I used to got my answer)

2119.121 / 2060.775 x 100 = ???

2119.121 / 2060.775 = 1.028312649

1.028312649 x 100 = 102.8312649

102.8312649 --> 103%