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Elena-2011 [213]

2 years ago

9

How many molecules of water are needed to completely hydrolyze a polymer that is 11 monomers long?

1 answer:

arlik [135]2 years ago

3 0

10 molecules of water are needed.

You might be interested in

The average bond energy (enthalpy) for a C=C double bond is 614 kJ/mol and that of a C−C single bond is 348 kJ/mol. Estimate the

AysviL [449]

Answer:

4.42x10⁻¹⁹ J/molecule

Explanation:

At a double bond, there's sigma and a pi bond, and at a single bond, there's only a sigma bond. Thus, if the energy to break both sigma and pi is 614 kJ/mol, and the energy to break only the sigma bond is 348 kJ/mol, the energy to break only the pi bond is:

E = 614 - 348 = 266 kJ/mol

Knowing that 1 kJ = 1000 J, E = 266,000 J/mol

By Avogadro's number, 1 mol = 6.02x10²³ molecules, thus:

E = 266,000 J/mol * 1mol/6.02x10²³ molecules

E = 4.42x10⁻¹⁹ J/molecule

7 0

2 years ago

Suppose that a 100 mL sample of ideal gas is held in a piston-cylinder apparatus. Its volume could be increased to 200 mL by

Ivahew [28]

Answer:

e. reducing the pressure from 608 torr to 0.40 atm at constant temperature.

Explanation:

According to Boyle's law when a gas is at the same temperature and there is a mass in a closed container so the pressure and the volume changes in the opposite direction

So here the equation is

$P_1V_1=P_2V_2$

Now we choose the options

where,

$V_1 = 100\ mL = 0.1\ L\\\\V_2 = 200\ mL = 0.2\ L$

$P_1 = 608\ torr = 0.8\ atm \\\\P_2= 0.4\ atm$

Now applying these values to the above equation

So,

P1V1=P2V2

$P_1V_1=P_2V_2$

$0.8\times0.1 = 0.4\times0.2$

0.8 = 0.8

Hence, it is proved

6 0

2 years ago

What are the 4 most abundant minerals in the continental crust? What percentage do these 4 makeup of the total?

Tanya [424]

Answer:

$SiO_2$ , $Al_2O_3$ , $CaO$ , $MgO$

Explanation:

The four most abundant minerals in the continental crust are, $SiO_2$ , $Al_2O_3$ , $CaO$ , $MgO$ .

The percentages are

$SiO_2=60.6\%$

$Al_2O_3=15.9\%$

$CaO=6.4\%$

$MgO=4.7\%$

$SiO_2$ is called quartz

$Al_2O_3$ is called corundum

$CaO$ is called calcium oxide or quick lime

$MgO$ is called magnesium oxide or magnesia

5 0

2 years ago

Explain why the actual electron configurations of 2-7-1-1 represents a sodium in an excited state

andre [41]

The second shell is left at 7, it should be filled to 8 to go to the next shell.

8 0

2 years ago

Consider the reaction. 2c(s,graphite) h2= c2h2(g) Based on the equation and the information in the table, what is the enthalpy o

xxTIMURxx [149]

<h3>The enthalpy of the reaction : C.226.73 kJ</h3><h3>Further explanation</h3>

Delta H reaction (ΔH) is the amount of heat change between the system and its environment

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)

The change in enthalpy in the formation of 1 mole of the elements is called enthalpy of formation

Delta H reaction (ΔH) is the difference between product enthalpy and reactant enthalpy (Hp-Hr)

Reaction :

2C + H2 -> C2H2

(ΔH) reaction = (ΔH) product - (ΔH) reactants

(ΔH) reaction = (ΔH) C2H2 - ((ΔH) C + (ΔH) H2)

for free element (ΔH) it has zero value, so (ΔH) C and (ΔH) H2 have zero value

From the available data: Hf (kJ / mol) C2 H2 (g)= 226.73

then

(ΔH) reaction = ΔH) C2H2 - ((ΔH) C + (ΔH) H2)

(ΔH) reaction = 226.73 - (0 + 0)

(ΔH) reaction = 226.73 (answer C)

<h3>Learn more</h3>

(ΔH) reaction

brainly.com/question/1889660

Keywords : (ΔH) reaction, C2H2

8 0

2 years ago

Read 2 more answers