what as the cause of wrld war 2?

Explanation:

Unsaturated solution: A solution with less solute that completely dissolves without leaving any remaining substance

Saturated solution: A solution with solute that dissolves until it can't dissolve anymore, leaving some of the remaining substance left.

Supersaturated solution: A solution that has more remaining substance left than a saturated solution and tends to crystallize more than a saturated solution.

Answer:

The point of contact between the skates and the ice.

Explanation:

It's obvious because friction is the contact between two surfaces.

Answer:

10.5g of KBr

Explanation:

molarity = moles of solute / litres of solution

we are given the volume of the solution in milliliters but the formula uses litres so we have to convert

to convert to liters we divide the number of milliliters by 1000 ( because 1 liter has 1000 milliliters. )

so liters of solution = 92.7/1000 = 0.0927 L

we can now plug in what we are given and solve for moles of solute

recall molarity = moles of solute / litres of solution

molarity = 0.955M and liters of solution = 0.0927L

so [tex]0.955M=\frac{moles.of.solute}{0.0927L}[/tex]

multiply both sides by 0.0927

we're left with moles of solute = 0.0885285 moles

Finally we must convert moles to grams

Molar mass of KBr = 39.0983 + 79.904 =  g/mol

Using dimensional analysis we get [tex]\frac{0.0885285molKBr}{} *\frac{119.002g}{1molKBr}[/tex]

the mol KBr cancel out on both sides and we get [tex]0.0885285 *119.002g[/tex] which is equal to 10.5g (rounded)

So we can conclude that 10.5g of KBr is dissolved in 92.7mL of a 0.955M solution.

Answer:

A

Explanation:

Recall that ΔH is the sum of the heats of formation of the products minus the heat of formation of the reactants multiplied by their respective coefficients. That is:

[tex]\displaystyle \Delta H^\circ_{rxn} = \sum \Delta H^\circ_{f} \left(\text{Products}\right) - \sum \Delta H^\circ_{f} \left(\text{Reactants}\right)[/tex]

Therefore, from the chemical equation, we have that:

[tex]\displaystyle \begin{aligned} (-317\text{ kJ/mol}) = \left[\Delta H^\circ_f \text{ N$_2$H$_4$} + \Delta H^\circ_f \text{ H$_2$O} \right] -\left[3 \Delta H^\circ_f \text{ H$_2$}+\Delta H^\circ_f \text{ N$_2$O}\right] \end{aligned}[/tex]

Remember that the heat of formation of pure elements (e.g. H₂) are zero. Substitute in known values and solve for hydrazine:

[tex]\displaystyle \begin{aligned} (-317\text{ kJ/mol}) & = \left[ \Delta H^\circ _f \text{ N$_2$H$_4$} + (-285.8\text{ kJ/mol})\right] -\left[ 3(0) + (82.1\text{ kJ/mol})\right] \\ \\ \Delta H^\circ _f \text{ N$_2$H$_4$} & = (-317 + 285.8 + 82.1)\text{ kJ/mol} \\ \\ & = 50.9\text{ kJ/mol} \end{aligned}[/tex]

In conclusion, our answer is A.

The water cycle iss a process which helps to circulate and replenish water on earth.

Hydrology is the scientific study of water bodies , the changes that occur in them as well as the various features and behavior of water bodies such as oceans and rivers.

Water circulation created by prevailing wind systems. The Gulf Stream is an example up of the Coriolis effect.

The length of open sea over which wind can blow steadily to create waves is called fetch.

Salinity is the amount of dissolved salt in a liquid

The distance from the crest of one wave to the crest of another is called wavelength

Water circulation created by differences in density deepwater currents

Energy is what moves forward and through a wave.

The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation is called water cycle.

As the amount of salt in water increases, the density of the water increases.

The type of energy possessed by moving water is called kinetic energy.

The rising of ocean water bringing nutrients up from the deep us called upwelling.

Therefore, the water cycle helps to circulate and replenish water on earth.

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Therefore, the final pressure of the oxygen is 5.51 atm.

Let's say an engineer wants to keep 500 g of oxygen at 1 atm and 125 degrees Fahrenheit in a container. The Ideal Gas Law is used to calculate the required capacity of a container before construction can begin.

Assuming that the oxygen behaves as an ideal gas and the volume is constant, we can use the ideal gas law to solve for the final pressure.

The ideal gas law states that:

PV = nRT

where:

P = pressure

V = volume

n = number of moles

R = gas constant

T = temperature

Since the volume is constant, we can rewrite the ideal gas law as:

P1/T1 = P2/T2

where:

P1 = initial pressure

T1 = initial temperature

P2 = final pressure

T2 = final temperature

We can plug in the given values and solve for the final pressure:

P1/T1 = P2/T2

4.1 atm / (100 + 273) K = P2 / (185 + 273) K

P2 = (4.1 atm / 373 K) * (185 + 273) K

P2 = 5.51 atm

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Understanding the theory of plate tectonics can make people more prepared if a natural disaster occurs. By understanding the theory of tectonic plates, you can possibly predict when the next tectonic-plate related natural disaster will occur.

Examples of scenarios that would adhere to the law of conservation of energy are as follows:

The law of conservation of energy states that energy cannot be created nor destroyed but is conserved when it is transferred from one form to another.

The law of conservation of energy is obeyed by majority of natural and artificial systems. For example;

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Answer:

Answer is D on edge 2022

Explanation:

Answer:

3167 .8 liters

Explanation:

P1 V1 = P2 V2

96.3 * 2000 = 60.8 * V2      solve for V2 =3167.8 l

Answer:

459.8m/s

Explanation:

T=Temperature in Kelvin

M=molar mass in kg/mol

Molar mass of CO2,

mm=44.01g/mol

=0.04401kg/mol

T =100.0C

= (100.0 +273) K

=373K

So,

vrms= sqrt(3×R×T/M)

vrms=sqrt(3×8.314×373.0/0.04401)

=459.8m/s

Answer: 20 + 1 + 3.8 + 2.4 +27 = 54.2

Explanation: 20 gallons plus 1 gallon plus 3.8 plus 2.4 plus 27 equals to a total number of 54.2 gallons for the propane.

Answer:

C. Shield Volcano

Explanation:

Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield.

Answer:

boiling point decreases in denver

Explanation:

in higher places

theres less atmospheric pressure

it takes less energy to bring water to the boiling point.

Less energy means less heat

which means water will boil at a lower temperature

wonderopolisorg

Answer:

1. yes

2. yes

3. no

hope this helps

sorry if I am wrong

The Sun formed about 4.6 billion years ago in a giant, spinning cloud of gas and dust called the solar nebula. As the nebula collapsed under its own gravity, it spun faster and flattened into a disk.

Answer:

hope it's helpful thanks

The enthalpy of formation or the total energy required to break all the bonds in 1 mol hexane and has a value of -198.67 kJ.

The energy of bond breaking is the energy required to break all the bonds in 1 mole of a substance.

This energy is also the energy required to form the bonds known as enthalpy of formation of that substance.

Therefore, the total energy required to break all the bonds in 1 mol hexane is known as it enthalpy of formation and has a value of -198.67 kJ.

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The pair of formulas represents two compounds that are electrolytes are HCl & NaOH.

Electrolytes are the solutions which contains positive or negative ions in it as a result of which it conducts electricity.

Hence pair of electrolytes are HCl & NaOH.

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The emf of the cell from the reactions and the change in free energy is 2.8 V.

The Eocell refer to the emf of the cell under standard conditions. In this case, it can be obtained from the free energy of the values of the reactants and products.

Now, given; C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)

ΔG°rxn = [2(-394) + 2( -237)] - [( -175 ) + 0 ]

= [(-788) + (-474)] + 175

= -1087  kJ/mol

Also;

ΔG° = -nFEocell

Eocell  = ΔG° /-nF

Eocell  = -1087  * 10^3/-(4 * 96500)

Eocell  =-1087  * 10^3/386000

= 2.8 V

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Answer:

First of all, it's KNO₃ not KNO.

Second, KNO₃ is neither an acid nor it is a base, infact, it is a salt and therefore it's neutral.

hope that helps...

Answer: 83.656 kpa

Explanation:

Use Dalton's law of partial pressures which states that the total pressure of a combination of gases is equal to the sum of the partial pressures of the constituent gases.

So we have,

P(total) = P(oxygen) + P(water vapour)

96.00 kpa = 12.344 + P(oxygen)

P(oxygen) = 83.656 kpa

Answer: It decreases.

Explanation:

Answer:

negative charge

Explanation:

Neutrons have no charge, protons have positive charge, and electrons have a negative charge

Answer:

I think Tetrahedral

Explanation: HaHa I D K

Answer:

Linear

Explanation:

Because it has zero lone pairs and only two atoms.

Answer:

i think d maybe correct me if im wrong

Explanation:

La³⁺ ions are colorless compounds because they have a 4f⁰ electronic configuration. Therefore, option (B) is correct.

The lanthanide series comprises 15 metallic chemical elements with atomic numbers 57 to 71, from lanthanum through the lutetium. These elements have chemically similar elements scandium and yttrium, which are often collectively called rare-earth elements.

The chemical symbol Ln can be used to refer to any lanthanide.  They are f-block elements, corresponding to the filling of the 4f-shell. All lanthanoids form trivalent cations, Ln³⁺ are determined by the ionic radius, which decreases from lanthanum to lutetium.

The valence orbitals in lanthanides have f → f transitions that are much weaker and narrower than d → d transitions. In general, the colors of lanthanide complexes are far fainter than transition metal complexes.

The electronic configuration of the lantanum is [Rn]5d¹6s². In the +3 oxidation state, it has all shells fully filled therefore, no electron transitions are possible. Therefore, La³⁺  form colorless compounds.

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The compound solubility which will not be affected by a low pH in solution is AgBr.

pH is a measure of the acidity or basicity of any solution and according to the pH scale 0 to 6.9 shows the acidity, 7 is neutral and 7.1 to 14 shows the basicity of any solution.

AgBr is not affected by a low pH in solution.

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Answer:

2 and 3

Explanation:

acids are known for being H+ donors so they increase concentration of h+ ions

Answer:

5 cc

Explanation:

.01 M * 500/1000  = .005 M needed

1.0 M  * x   .005 M

x =.005 liter  5 cc  

5cc of 1M dilute to 500 cc

The concentration or volume of a solution can be determined from the molarity and volume of the second solution. The volume the solution  of 1 M to prepare 500cm³ of 0.01 molar solution is 5 molar.

Molarity of a solution is its concentration in terms of number of moles per unit volume. Molarity depends on the temperature and amount of solute and solvent as well.

If a solution have M1 molarity and V1 volume and a second solution have M2 volume and V2 volume then the relation between these quantities is written as follows:

M1V1 = M2V2

Given that solution to be prepared has the concentration of 0.01 M and volume of 500 cm³. Then the volume of stock solution with 1.0 M concentration is calculated as follows:

500cm³ × 0.01 M = 1.0 M × V2

V2 = (500cm3 × 0.01 M )/1.0 M

     = 5 cm³

Hence, the volume of stock solution is 5 cm³ required for the preparation of 500cm³ of 0.01 molar solution.

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Explanation:

[tex]1m = {10}^{ 9} nm[/tex]

[tex]59m = 59 \times {10}^{9} nm[/tex]

I hope it helped you

5.9 × 10⁹

Explanation:

1m = 10^-9 nm

=5.9 × 10⁹

=5.9 × 1 000 000 000

=5 900 000 000 nm

=5.9 ×10⁹

Answer:

It doesn't matter because either or it's still a cation because its positive