Outdoor decay of objects is a chemical reaction. Some ancient objects have been preserved extremely well in Arctic conditions. As glaciers have melted, archaeologists have discovered 4,000-year-old Viking clothing. Clarissa left her wool sweater outside at her family's summer cottage in Florida. When she returned the following summer, the sweater was in shreds, decayed by reactions that break down wool. Based on the data in the table, what can you conclude about the rate at which clothing decays in cold temperatures compared with the rate at which clothing decays in warm temperatures?

A. More information is needed to compare rates of decay

B. Reactions occur at the same speed in all temperatures

C. Reactions occur more quickly in the cold

D. Reactions occur more slowly in the cold.​

Answer:

Explanation:

Even if you have a Hotmail email address, you now use the Outlook.com interface to ... I searched and found a Hotmail support number, but is it legit? ... one from Leo's e-mail, I receive a message from windows stating it can't find the site.

Answer:

0.00127840909

Explanation:

yehehdhdalakdjhd

Answer:

Insulator

Explanation:

An eraser can't conduct electricity, which makes it an insulator.

Answer: C) the rate of forward reaction is not equal to the rate of backward reaction. This should be the answer.

Explanation:

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we're finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

We have

[tex]V_2 = \frac{2 \times 10}{1} = 20 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

For example, when atoms lose or gain electrons they become charged particles called ions. Three ways electrons can be transferred are conduction, friction, and polarization. In each case, the total charge remains the same. This is the law of conservation of charge.

Explanation:

Answer:its c and d

Explanation:

When a reaction has reached equilibrium with a given set of conditions, if the conditions are not changed, the reaction will remain at equilibrium forever. The forward and reverse reactions continue at the same equal and opposite rates and the macroscopic properties remain constant.

It is possible, however, to disturb that equilibrium by changing conditions. For example, you could increase the concentration of one of the products, or decrease the concentration of one of the reactants, or change the temperature. When a change of this type is made within a reaction at equilibrium, the reaction is no longer in equilibrium. When you alter something in a reaction at equilibrium, chemists say that you put stress on the equilibrium. When this occurs, the reaction will no longer be in equilibrium and the reaction itself will begin changing the concentrations of reactants and products until the reaction comes to a new position of equilibrium. How a reaction will change when a stress is applied can be explained and predicted. That is the topic of this section.

Answer:

514.4999849999999

Explanation:

Answer:

1. B = 1.13M

2. A. 8.46%

3. D = 0.0199

Explanation:

1. Molarity of a a solution = number of moles of solute/ volume of solution in L

Number of moles of solute = mass of solute/molar mass of solute

Molar mass of NaC₂H₃O₂ = 82 g/mol, mass of NaC₂H₃O₂ = 245 g

Number of moles of NaC₂H₃O₂ = 245 g / 82 g/mol = 2.988 moles

Molarity of solution = 2.988 mols/ 2.65 L = 1.13 M

2. Percentage by mass of a substance = mass of substance /mass of solution × 100%

Mass of 2.65 L of water = density × volume

Density of water = 1 Kg/L = 1000 g/L; volume of waterb= 2.65 L

Mass of water = 1000 g/L × 2.65 L = 2650 g

Mass of solution = mass of water + mass of solute = 245 + 2650 =2895 g

Percentage by mass of NaC₂H₃O₂ = 245/2895 × 100% = 8.46%

3. Mole fraction of NaC₂H₃O₂ = moles of NaC₂H₃O₂/moles of solution

Moles of water = mass /molar mass

Mass of water = 2650 g; molar mass of water = 18 g/mol

Moles of water = 2650 g / 18 g/mol = 147.222 moles

Moles of solution = moles of solute + moles of water = 147.222 + 2.988 = 150.21

Moles of NaC₂H₃O₂ =2.988 moles

Moles fraction of NaC₂H₃O₂ =2.988/150.21 = 0.0199

Answer:

V = 0.798 L

Explanation:

Hello there!

In this case, for this gas stoichiometry problem, we first need to compute the moles of carbon dioxide via stoichiometry and the molar mass of starting calcium carbonate:

[tex]3.56gCaCO_3*\frac{1molCaCO_3}{100gCaCO_3} *\frac{1molCO_2}{1molCaCO_3} =0.0356molCO_2[/tex]

Next, we use the ideal gas equation for computing the volume, by bearing to mind that the STP conditions stand for a pressure of 1 atm and a temperature of 273.15 K:

[tex]PV=nRT\\\\V=\frac{nRT}{P}\\\\V=\frac{0.0356mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm} \\\\V=0.798L[/tex]

Best regards!

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons.

Answer:

its basically represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table

Explanation:

sry i its too long

hope it helps

Explanation:

tttttttttttttttttttttttt

Answer:

Because of the gravity of the Earth

Answer:c

Explanation:

Explanation:

new Mexico and Louisiana

Answer: two two

Explanation:

Answer:

i guess you mean its volume, so the answer is "shrunken" 3 times

Explanation:

from the equation pV=nRT, whatever happens to its pressure, the opposite happens to its volume.

Answer:

Is a nonrenewable resource

Explanation:

"The fuel for fusion reactors can be drawn from sea water in an almost unlimited supply. The fuel for fission, on the other hand, comes from a limited supply of uranium. Once it is depleted, it cannot be easily replenished. For this reason, nuclear power is considered a nonrenewable resource."

I got this source from ODY

Hope I could help! :)

Have a nice day

Answer:

is a nonrenewable resource

Explanation:

The four ionic species initially in solution are Na⁺, PO₄³⁻, Cr³⁺, and Cl⁻. Since the precipitate is composed of Cr³⁺ and PO₄³⁻ ions, the spectator ions must be Na⁺ and Cl⁻.

The complete ionic equation is 3Na⁺(aq) + PO₄³⁻(aq) + Cr₃⁺(aq) + 3Cl⁻(aq) → 3Na⁺(aq) + 3Cl⁻(aq) + CrPO₄(s).

So the balanced net ionic equation for this reaction would be Cr³⁺(aq) + PO₄³⁻(aq) → CrPO₄(s).

Answers:

Which two ions are Spectator Ions?

Na+

Cl-

The net ionic reaction is Cr2+PO42...

Cr2(PO4)3

i think its C not so sure rho

good ,uck!!!!

Based on the data given, the correct rate law of the sample reaction is: C. [tex]R = K[A]^2[B]^1[C]^0[/tex]

Rate law can be defined as a chemical equation that is typically used to relate the initial (forward) chemical reaction rate with respect to the concentrations or pressures of the chemical reactants and constant parameters.

Mathematically, the rate law is given by this formula:

[tex]R = K[A]^x[B]^y[C]^z[/tex]

Where:

Based on the data given, the correct rate law of the sample reaction is as follows:

[tex]R = K[A]^2[B]^1[C]^0[/tex]

Read more on rate constant here: brainly.com/question/24749252

Answer:

substitutions, deletions and insertions

Answer:

[tex]m_{CO_2}=0.88g[/tex]

Explanation:

Hello there!

In this case, since we are talking about a decomposition reaction whereby calcium carbonate is decomposed to calcium oxide and carbon dioxide according to the following chemical equation:

[tex]CaCO_3\rightarrow CaO+CO_2[/tex]

Next, we must recall the law of conservation of mass which states that matter cannot be neither created nor destroyed so the mass of calcium carbonate equal the addition of the mass of both calcium oxide and carbon dioxide:

[tex]m_{CaCO_3}=m_{CaO}+m_{CO_2}[/tex]

Which must be solved for the mass of carbon dioxide as we are given those of calcium carbonate and calcium oxide:

[tex]m_{CO_2}=m_{CaCO_3}-m_{CaO}\\\\m_{CO_2}=2.00g-1.12g\\\\m_{CO_2}=0.88g[/tex]

Best regards!

Answer:

Why does Magnesium Oxide have a higher melting point than Sodium Chloride? ... As the charge in the ionic lattice in Magnesium Oxide is two times as large, the ionic bonding is stronger so more energy is required to overcome the electrostatic attraction and break down the ionic lattice.

HI thts way tooo much to answer but ye.

Answer:

the molecular formula of the soap is C₅₄H₁₀₂O₆

Explanation:

Given;

composition of carbon, C = 76.5%

composition of oxygen, O = 11.3%

Composition of hydrogen, H = 12.2%

The empirical formula is calculated as follows;

C:    76.5% / 12          O:  11.3% / 16             H:   12.2% / 1

     =  6.375                  =   0.706                   =  12.2

Divide through by the least number (0.706);

    =  6.375/0.706           = 0.706 / 0.706          =  12.2 / 0.706

   =  9                              =    1                              =  17

The empirical formula = C₉H₁₇O

The molecular formula is calculated as follows;

(C₉H₁₇O)n = 847

(9 x 12    +   17 x 1      +  16 x 1)n   = 847

(108 + 17 + 16)n = 847

141n = 847

n = 847/141

n = 6

The molecular is (C₉H₁₇O)6 =  C₅₄H₁₀₂O₆

Therefore, the molecular formula of the soap is C₅₄H₁₀₂O₆

Answer:

h

Explanation:

gy

Answer:

b

both objects will receive a certain amount of thermal energy and heat up

Answer:

The enthalpy of an endothermic reaction is positive, I believe.

''The enthalpy of an endothermic reaction is positive'' is the true statement about endothermic reaction

If a reaction absorbs more energy than releasing it, the reaction is considered as endothermic and enthalpy will be positive while on the other hand, if a reaction absorbs less energy and releasing more, the reaction is considered as exothermic and enthalpy will be negative.

So we can conclude that option C is the right answer.

Learn more about reaction here: https://brainly.com/question/26018275