Using the balanced equation below,
how many grams of zinc would be
required to produce 9.65 g of zinc
hydroxide?
Zn + 2MnO2 + H20 → Zn(OH)2 + Mn203

Please help I need it for a test

Answer:

10.9 * 10^-7 m

Explanation:

We know that the Rydberg constant (R) is – 13.6 eV = -2.18 * 10^-18 J

ΔE= -R(1/nf - 1/ni)

Where;

nf = final state

ni= initial state

ΔE=  -2.18 * 10^-18(1/3 - 1/4)

ΔE= -2.18 * 10^-18(1/12)

ΔE= -1.81 * 10^-19 J

From;

ΔE=hc/λ

h = plank's constant = 6.6 * 10^-34 Js

c = 3 * 10^8 ms-1

λ = ?

λ = hc/ΔE

λ = 6.6 * 10^-34 * 3 * 10^8/ 1.81 * 10^-19

λ = 10.9 * 10^-7 m

Answer:

A molecule is a group of two or more atoms that form the smallest recognizable unit into which the structure and chemical properties of that substance can be divided and preserved by a pure substance.

Explanation:

Answer:

Which is kinetic energy at its best, cause you are moving your arm or hand in motion, bu the object is in potential energy, where it isn't moving

Explanation:

Answer:

Mass =  11.16 g

Explanation:

Given data:

Mass of hydrogen = 8 g

Mass of oxygen = 10 g

Mass of water produced = ?

Solution:

Chemical equation:

2H₂ + O₂         →      2H₂O

Number of moles of hydrogen:

Number of moles = mass / molar mass

Number of moles = 8 g/ 2 g/mol

Number of moles = 4 mol

Number of moles of oxygen:

Number of moles = mass / molar mass

Number of moles = 10 g/ 32 g/mol

Number of moles = 0.31 mol

now we will compare the moles of hydrogen and oxygen with water.

                   O₂          :           H₂O

                    1            :             2

                  0.31         :            2/1×0.31 = 0.62

                  H₂           :            H₂O

                    2            :              2

                     4            :              4

Number of moles of water formed by oxygen are less this it will act as limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 0.62 mol × 18 g/mol

Mass =  11.16 g

Answer:

819.45 K

Explanation:

Use the Ideal Gas Law to make sense of this problem, PV = nRT. From this equation, we know that pressure is directly proportional to temperature and that volume is also directly proportional to temperature. Therefore, doubling the temperature would double the pressure, and doubling the temperature would also double the volume. In the described scenario, the temperature is doubled twice, so the temperature is quadrupled (i.e. three times its original amount has been added).

The initial temperature was 273.15 K. Multiply this by 3 to get your answer of 819.45 K.

Answer: d. the distance between two rarefactions,

Explanation:

Wavelength is the distance between two identical adjacent points in a wave. This means that it is the distance between two adjacent compressions or two adjacent rarefactions.

Wavelengths are inversely related to frequency because the longer the wavelength, the less the number of wave cycles per second.

Answer:

See Explanation ...

Explanation:

        2AgNO₃(aq)    +    Na₂S(aq) => 2NaNO₃(aq) + Ag₂S(s)

given  2.0g                        2.5g          Spec Ions       Driving Force ppt

= 2.0g/169.8g·mol⁻¹        =2.5g/78g·mol⁻¹

= 0.012mol                      =0.032mol

0.012/2=>0.006*              0.032/1=>0.032*

Limiting Reactant => *Dividing moles by respective coefficient => Limiting Reactant is the smaller resulting value. Therefore AgNO₃ is the Limiting Reagent

Theoretical Yield of ppt Ag₂S(s) = 1/2(0.012 mol) = 0.006 mol Ag₂S(s) = 0.006mol(246g·mol⁻¹ ) = 1.48g Ag₂S(s)

%Yield = (Lab Yield/Theoretical Yield) x 100% = (1.25g/1.48g)100% = 84%

Reagent in Excess => Na₂S(aq) => 0.032mol is given but only 0.016mol is consumed in the reaction. That is, (0.032 - 0.016)mol = 0.016mol  Na₂S(aq) remains in excess = (0.016mol)(78g·mol⁻¹) = 1.25g Na₂S(aq) in excess.

CnHm is the general closed chemical formula of liquid hydrocarbons used as a fuel in the internal combustion engines. However, hydrocarbons consist of hydrogen and carbon and also small amounts of O2, H2, S, H2O, and some metals containing crude oil derivatives .

Answer:

B. Inertia resist changes to the state of motion of a body.

Explanation:

The force of inertia is an inherent property of matter in which it allows a body to resist changes to the state of motion of the body.

According to Newton's first law of motion "a body will remain at rest or in constant motion unless if an external force acts on it".

This is the law inertia.

Answer:

1.4 x 10³

Explanation:

Given:

(3.5 x 10⁵)x(4 x 10⁻³)

Find:

Exponent form

Computation:

⇒ (3.5 x 10⁵)x(4 x 10⁻³)

⇒ 3.5 x 4 x 10²

⇒ 14 x 10²

1.4 x 10³

first we find the mass of the final solution

we know that

density=mass/volume

we know the density and volume

1=m/100

m=100g

now we calculate the mass ofNa2CO3

2% of 100 is equal with 2g of Na2CO3

Answer:

c

Explanation:

Because they are in the wild and they move a lot because they freedom. They are easy to close but you can not position so it is c. Pls tell if I am wrong.

Answer:

A. Fossils of organisms that lived in warm climates have been found in arctic environments.

Explanation:

One of the logic used by Geologists to justify plate movement over a region of space is that the fossils of organisms that lived in warm climates have been found in arctic environments.

Answer:

0.8333 L. P1v1=p2v2

Explanation:

I dont now if this is wht you were looking for so srry

The pressure of the gas at which the final volume of the gas has been 3 L has been 0.833 atm.

The gas has been assumed to be at constant temperature. The change in the pressure and volume of gas at constant temperature can be given by:

Initial pressure × Initial volume = Final pressure × Final volume

The initial pressure of gas has been 0.5 atm, and the initial volume has been 5L. The increased volume or final volume of the system has been 3 L.

The final pressure of the gas has been given by:

0.5 atm × 5 L = 3 L × Final pressure

Final pressure = 0.833 atm.

The pressure of the gas at which the final volume of the gas has been 3 L has been 0.833 atm.

For more information about the pressure of the gas, refer to the link:

https://brainly.com/question/6534127

This chemical reaction can also be written as

2C2H6+7O2-->4CO2+6H2O

This is a chemical reaction because reactants are converted into products. This is the combustion of ethane where ethane and oxygen have been converted into carbon dioxide and water

Answer:

12.9 L Kr

General Formulas and Concepts:

Chemistry - Gas Laws

Explanation:

Step 1: Define

0.575 mol Kr

Step 2: Identify Conversions

1 mol= 22.4 L at STP

Step 3: Convert

[tex]0.575 \ mol \ Kr(\frac{22.4 \ L \ Kr}{1 \ mol \ Kr} )[/tex] = 12.88 L Kr

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

12.88 L Kr ≈ 12.9 L Kr

Answer:

the pressure = 1937mmhg using standered unit of volume

9514 1404 393

Answer:

  about 16.5 cm³

Explanation:

Volume, mass, and density are related by ...

  volume = mass/density

  volume = (285 g)/(17.3 g/cm³) ≈ 16.5 cm³

Answer:

the answer Is d

Explanation:

or the last option is the answer if u need an explanation I may help u and tell me if u are from India

Answer:

dvis you're answer please like me

Answer:

HNO3

Explanation:

HNO3 is nitric acid. Nitric acid as a compound contains Hydrogen, Nitrogen and Oxygen molecules, therefore its chemical formula is HNO3. Very useful for fertiliser and chemical making. This acid can be manufactured from ammonia and it is a very important chemical that is used for manufacturing fertilizers.

Nitric acid is useful for the manufacturing of ammonium nitrate and calcium ammonium nitrate which have uses as fertilizers.

Answer:

A mixture of sodium chloride and sand in water can be separated by the process of filtration and then by the process of distillation.

Answer:

Explanation:

As this oxide is insoluble in water you would dissolved the sample of sodium chloride in water and filter off the oxide.

Then concentrate the liquid by boiling and cooling, to get crystals of pure sodium chloride.

Answer:

[tex]\displaystyle \frac{dh}{dt} = \frac{1}{10 \pi}[/tex]

Explanation:

Volume of a cone:

We have [tex]\displaystyle \frac{dV}{dt} = \frac{10 \ cm^3}{sec}[/tex] and we want to find [tex]\displaystyle \frac{dh}{dt} \Biggr | _{h\ =\ 6}= \ ?[/tex] when the height is 2 cm.

We can see in our equation for the volume of a cone that we have three variables: V, r, and h.

Since we only have dV/dt and dh/dt, we can rewrite the equation in terms of h only.

We are given that the height of the cone is 1/5 the radius at any given time, 1/5r, so we can write this as r = 5h.

Plug this value for r into the volume formula:

Differentiate this equation with respect to time t.

Plug known values into the equation and solve for dh/dt.

Divide both sides by 100π to solve for dh/dt.

The height of the cone is increasing at a rate of 1/10π cm per second.

Answer:

Lithium is reduesednas it gains electrons gold

Answer:

Look at Lithium on the Periodic Table, look at the amount of electrons. When Lithium and Gold are together, Lithium loses while Gold(Au) gains.

Answer:

5.37 L

Explanation:

To solve this problem we need to use the PV=nRT equation.

First we calculate the amount of CO₂, using the initial given conditions for P, V and T:

1.03 atm * 4.80 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 291.16 K

We solve for n:

Then we use that value of n for another PV=nRT equation, where T=37 °C (310.16K) and P = 745 mmHg (0.98 atm).

And we solve for V:

Answer:

they arent alcohols.

Explanation:

Answer:

b

Explanation: