At STP, one mole of oxygen and one mole of neon contain equal numbers of​

Answer:

There are many examples of chemical equilibrium all around you. One example is a bottle of fizzy cooldrink. In the bottle there is carbon dioxide (CO2) dissolved in the liquid. There is also CO2 gas in the space between the liquid and the cap.

Answer:

you may proceed now

Answer what?? I don't see anything.

Order of metals from least reactive to most reactive: B <C <A <D

Reducing agents are substances that experience oxidation  

Oxidizing agents are substances that experience reduction

The metal activity series is expressed in voltaic series  

Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au  

The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent  

The more to the right, the metal is less reactive (harder to release electrons) and the stronger oxidizing agent

So that the metal located on the left can push the metal on the right in the redox reaction  

Let's analyze the statement in the problem

I. Only A, C and D react with 1 mol/L HCl to give H₂(e)

M + HCl ⇒ MCl + H₂(MCl : alkali, MCl₂ : alkaline earth)

A, C and D can react with 1 mol / L HCl, meaning metals A, C and D are located to the left of element H (more reactive), and B in the right of element H

II. When A is added to solutions of the other metal ions, metallic B and C are  formed but not D.

This means that metal A is more reactive than metals B and C, while D is more reactive than A, so metal D is the most reactive

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{5.25 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 87.209302...[/tex]

We have the final answer as

Hope this helps you

Answer:

I answer is c I'm sorry if I'm wrong but please mark me brainlest I will mean a lot

Answer:

See explanation

Explanation:

When AgNO3 is added to the system the equilibrium position shifts towards the left hand side because of the formation of AgCl as a precipitate thereby sequestering the Cl^- from solution.

AgNO3(aq) + Cl^-(aq) ------> AgCl(s) + NO3^-(aq)

[Cu(H2O)6]^2+(aq) + 4Cl^–(aq) ------> [CuCl4]^2–(aq) + 6H2O(l)

The equilibrium of this reaction shifts towards the right as more Cl^– is added making the color of the solution to change from blue to green.

[Cu(H2O)6]^2+(aq) + 4Cl^–(aq) + heat ------> [CuCl4]^2–(aq) + 6H2O(l)

This reaction is endothermic. addition of heat makes the solution to turn green (equilibrium shifts towards the right) while removal of heat makes the solution to turn blue (equilibrium shifts towards the left).

Answer:

11.5moles of oxygen gas

Explanation:

The reaction equation is shown below;

     C₂H₆O  + 3O₂ → 2CO₂  +  3H₂O

 We were given  11.5moles of H₂O produced;

Since the equation is balanced;

          3 mole of oxygen gas was used to produce 3 mole of water

        11.5 moles of water will be produced [tex]\frac{11.5 x 3}{3}[/tex]   = 11.5moles of oxygen gas

Answer:

9moles of h20 hndi parin ako sure

Answer:

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Answer:

Figure 1: This blood spatter came from the right side. The impact was not hard. The blood may have come from a dripping wound though there is some evidence of movement, which may indicate the person with the wound was moving as the blood fell.

Figure 2: The elongated blood spatter shows that blood was traveling at a high velocity. The impact came from the right-hand side, and it was forceful.

Figure 3: This spatter shows circular drops, showing that the blood fell under the effect of gravity with no movement from the wound.

Explanation:

Plato

Answer: C

Explanation: Answered this same question on a test before

Answer: yes

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.91 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.04833887...[/tex]

We have the final answer as

Hope this helps you

Answer:

It is necessary to use models to study sub- microscopic objects such as atoms and molecules because they are too small to be seen.

Answer:

final volume = 10.5 Liters N₂(g) at 21°C and 823Torr*

Explanation:

*Note=>No specified mass value of N₂(g) is defined in the problem. Therefore for a starting point, the gas sample is assumed to be 1.00 mole N₂(g) at STP conditions  22.4L

Determine volume of  N₂(g) at 21°C(=294K) and 823 Torr (= 2.286 Atm).

Start with Volume of N₂(g) at 0°C and 1 Atm pressure => 22.4L and adjust to final volume of  N₂(g) based upon 21°C(=294K) and 823 Torr (= 2.286 Atm).

V(final) = 22.4L(294K/273K)(360 Torr/823 Torr) = 22.4L(294/273)(360/823) = 10.55 Liters final volume.

Note: The volume of 1 mole (assumed) of any gas at STP (0°C/1 Atm) is 22.4 Liters. To convert to non-STP conditions, convert temperature and pressure factors (changes) that reflect what happens when the gas is expanded or decreased; but, these adjustments are taken independently for each variable of interest.  The following notes explain.

For the increase in temperature from 0°C(=273K) to 21°C(=294K) one must apply a temperature ratio that will increase volume. That is, the change in volume due to the temperature change is 294K/273K. If a 273K/294K ratio were used the volume would have decreased. Not so for heating a sample of gas.

For the increase in pressure one should expect a decrease in volume. Therefore apply a pressure ration that will effectively decrease the volume of the gas. That is, to decrease a 22.4L sample at STP multiply the standard volume by a ratio of pressures that will decrease 22.4L to a smaller volume. That is, V(final by pressure effects) multiply by 360Torr/823Torr to decrease the STP VOLUME (22.4L) to the new non-standard volume. If 823Torr/360Torr were used, the final volume would not be smaller, but larger. Such is the physical effect of an increasing pressure change.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{5.6 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 93.023...[/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

edge food and nutrition!!

Answer:

3.2

Explanation:

Answer:

Explanation:

Ground : 1s2 2s2 2p6 3s2

Excited 1s2 2s2 2p6 3s1

it is excited

Answer:

A botfly that lays an egg in the skin of an animal when the larvae hatches from the egg, it burrows deep into the skin. The animal that may become sick from having the larvae under its skin is called Mutualism.

Explanation:

The animal is the host while the botfly is the parasite. A mutualism in which one mutualistic partner removes parasites, as well as dead or diseased skin from another, in return receiving a steady supply of food is called Pollination. Nearly all pollination services involve a mutualism that has evolved over millions of years. Another example is reproduction.

Answer:

4.36 ppm

Explanation:

First we convert percent transmittance to absorbance:

Then we calculate the concentration of the solution, using Lambert-Beer's equation:

It is usually used with molar concentrations but given that the given absortivity is in ppm terms and the answer is also in ppm, we can simply use the given value.

The concentration of the solution is 4.36 ppm when the percent transmittance measured in a 1.00 cm cell is 53.9%, the absorptivity is 6.14x10⁻² L/(mg*cm), and the wavelength is 580 nm.        

We can calculate the concentration of the solution with the Beer-Lambert equation:  

[tex] A= \epsilon Cl [/tex]   (1)  

Where:

With the transmittance, we can find the absorbance as follows:

[tex] A = -log T [/tex]  

Where T is the transmittance = 53.9% = 0.539

So, the absorbance is:

[tex] A = -log T = -log(0.539) = 0.268 [/tex]

Finally, by solving equation (1) for C, we have:

[tex] C = \frac{A}{\epsilon l} = \frac{0.268}{6.14 \cdot 10^{-2} L/(mg*cm)*1.00 cm} = 4.36 mg/L [/tex]

Therefore, the concentration of the solution is 4.36 ppm.

You can find more about absorbance and transmittance here:

I hope it helps you!

Answer:

30moles of SiO₂

Explanation:

Given parameters:

Number of moles of O₂  = 30moles

Unknown:

Number of moles of SiO₂  = ?

Solution:

To solve this problem, we need to write the reaction expression:

       Si +  O₂  →  SiO₂  

The reaction is balanced;

      1 mole of O₂ will produce 1 mole of SiO₂

     30mole of O₂ will produce 30moles of SiO₂

Answer:

Organism B produces pyruvic acid at a faster rate as the temperature increases than Organism A.

Explanation:

Answer: The way to get the answer is to know and understand certain relationships between [H3O+] and [OH-].  One such relationship which you must know (memorize) is...

[H3O+] [OH-] = 1x10-14 = Kw  (the rest is algebra)

[H3O+] [1x10-12] = 1x10-14

[H3O+] = 1x10-14 / 1x10-12

[H3O+] = 1x10-2 = 0.01 M

Explanation: HOPE IT HELPS!

Answer:

A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change.

ok so you will know when a chemical equation is happening or happened because there will be some sort of spark/fire or something like that.

Answer:

Final Volume = 0.036 L

Explanation:

Initial Pressure P1 = 1 atm

Initial Volume V1 = 1.98L

Final Pressure T1 = 55.0 atm

Final Volume V2 = ?

Temperature was held constant

The formulae relating these variables is Charles Law. This law states that the volume of a gas is inversely proportional to the pressure of a gas system provided temperature is held constant. The equations given as;

V1P1 = V2P2

V2 = V1P1 / P2

V2 = 1.98 * 1 /  55

V2 = 0.036 L

Answer:When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... They contract when they lose their heat.

Explanation:Google

Answer:

0.826 g/cm³

Explanation:

density = mass/volume

density = 715 g/866 cm³

density = 0.82564 g/cm³

Rounded to 3 significant figures: 0.826 g/cm³