Which diagram correctly shows the orbits of the Sun, Earth, and Moon in the geocentric model of the solar system?

Answer: Acids have a sour taste. Lemons, vinegar, and sour candies all contain acids. Acids change the color of certain acid-base indicators. Two common indicators are litmus and phenolphthalein. This are som Characteristics of acid.

Answer:

Explanation:

these are the characteristics of an acid.

hope this helps!

Answer:

Explanation:

Determine the balanced chemical equation for the chemical reaction.

Convert all given information into moles (most likely, through the use of molar mass as a conversion factor).

Calculate the mole ratio from the given information.

Answer:

Distance = 18 meters

Explanation:

Given the following data;

Force = 50 N

Speed = 1.5 m/s

Time = 12 seconds

To find the distance travelled;

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the equation;

[tex]Speed = \frac{distance}{time}[/tex]

Making distance the subject of formula, we have;

Distance = speed * time

Substituting into the formula, we have;

Distance = 1.5 * 12

Distance = 18 meters

Additionally, to find the workdone;

Workdone = force * distance

Workdone = 50 * 18

Workdone = 900 Joules

Answer:

Have a nucleus

Explanation:

Pls check..

Answer:

pH = -log 2.6 x 10-6 M

pH = 5.585

pOH= 14 - 5.585 = 8.415

8.4 as 2 sig figs

Answer:

72.58 g/mol

Explanation:

mark me brainless if I am ✅

The relationship between the rate of diffusion and the molar mass is given by Graham's law.  A gas diffusing 1/6 times faster than hydrogen will have a molar mass of 72.58 g/mol. Thus, option d is correct.

Graham's law states the inverse relationship between the rate of diffusion and the square root of the molar mass of the gas. It is given as,

Rate = 1 ÷ √M

The molar mass of the gas that diffuses 1/6 times faster than hydrogen is calculated as,

R₁ ÷ R₂ = √ (M₂ ÷ M₁)

Here,

The molar mass of hydrogen = M₁

The molar mass of unknown gas = M₂

Rate of diffusion of hydrogen gas = R₁

Rate of diffusion of unknown gas = R₂ = 1 / 6 R₁

Substituting values:

R₁ ÷ 1/6 R₁ = √M₂ ÷ 2

6 × 1.414

= 8.485

= 84.85 g/mol ≈ 72.58 g/mol

Therefore, option d. 72.58 g/mol is the molar mass of unkown gas.

Learn more about Graham's law here:

https://brainly.com/question/19589867

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option c is the correct answer

because the gas there will be evolved and caused the equilibrium to shift to right side

Answer:

[tex]\boxed {\boxed {\sf D. 0.440 \ mol \ NaOH}}[/tex]

Explanation:

To convert from moles to grams, the molar mass is used (mass of 1 mole). The values are the same as the atomic masses on the Periodic Table, but the units are grams per mole (g/mol) instead of atomic mass units.

We are given the compound sodium hydroxide (NaOH) and we need to look up the molar masses of the individual elements.

The formula for the compound has no subscripts, so there is 1 mole of each element in 1 mole of the substance. We can simply add the molar masses.

This means there are 39.9967693 grams of sodium hydroxide in 1 mole.

Use the molar mass we found as a ratio.

[tex]\frac {39.9967693 \ g \ NaOH}{ 1 \ mol \ NaOH}[/tex]

Since we are converting 17.6 grams of NaOH to moles, we multiply by this value.

[tex]17.6 \ g\ NaOH *\frac {39.9967693 \ g \ NaOH}{ 1 \ mol \ NaOH}[/tex]

Flip the ratio so the units of grams of NaOH cancel.

[tex]17.6 \ g\ NaOH *\frac {1 \ mol \ NaOH}{ 39.9967693 \ g \ NaOH}[/tex]

[tex]17.6 *\frac {1 \ mol \ NaOH}{ 39.9967693}[/tex]

[tex]\frac{17.6 }{ 39.9967693} \ mol \ NaOH[/tex]

[tex]0.4400355406 \ mol \ NaOH[/tex]

The original measurement of grams has 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place.

The 0 in the ten thousandths place (in bold above) tells us to leave the 0 in the thousandth place.

[tex]0.440 \ mol \ NaOH[/tex]

17.6 grams of sodium hydroxide are equal to 0.440 moles of sodium hydroxide.

Answer: Initial pH is 13.243

12.83

1.3

40ml

7

Explanation:

Just finished the test.

Answer: 90 degrees.

Explanation:

Answer:

Falso.

Explanation:

El modelo cuántico (no relativista) de Schrodinger, piensa a los electrones como ondas estacionarias, tal que la amplitud de dichas ondas decae muy rápidamente cuando se "alejaban" del radio atómico. (Es decir, habia poca probabilidad de que los electrones escaparan del radio atomico, y era por ello que se quedaban orbitando cerca del nucleo). Es decir, podríamos pensar en esto como una "nube de probabilidades" más que una nube electronica

La idea de nube electrónica realmente viene de modelos previos, como el de Rutherford o el de Bhor, los cuales eran modelos clásicos.

Explanation:

when Magnesium is reacted with Aluminum oxide, Aluminum being a less reactive metal than magnesium, is replaced by magnesium

Al2O3 + 3Mg - 3MgO + 2Al

hence reaction takes place

Answer:Base A is the weakest conductor electricity

Explanation:

Dissociation is a factor that affects electrical conductivity. The greater the percentage of dissociation for bases the stronger the conductivity of electricity.

Given that

Base A dissociates 25% in water

Base B dissociates 50%.

Base C dissociates 75%

We can conclude that  Base A is the weakest conductor oelectricity since it has the lowest percentage of dissociation.

Answer:

CaC2 + 2H20 ⇋Ca(OH)2 + C2H2

Explanation:

CaC2 + A H20 ---> Ca(OH)2 + A C2H2

This is calcium carbide reacting with water to produce calcium hydroxide and ethyne commonly called acetylene.

Let's now balance the equation.

CaC2 + 2H20 ⇋Ca(OH)2 + C2H2

Answer:

K = [HI]² / [H₂] [I₂]

Explanation:

To write the expression of equilibrium constant, K, it is important that we know how to obtain the equilibrium constant.

The equilibrium constant, K for a given reaction is simply defined as the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient. Thus, the equilibrium constant is written as follow:

K = [Product] / [Reactant]

Now, we shall determine the equilibrium constant for the reaction given in the question above. This can be obtained as illustrated below:

H₂(g) + I₂(g) —> 2HI (g)

K = [HI]² / [H₂] [I₂]

Answer:

0.076 atm

Explanation:

Using the combined gas law formula;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

T1 = initial temperature (K)

T2 = final temperature (K)

V1 = initial volume (L)

V2 = final volume (L)

According to the information provided in this question;

P2 = ?

P1 = 0.250 atm

V2 = 496 L

V1 = 300 L

T2 = 200K

T1 = 400K

Using P1V1/T1 = P2V2/T2

0.250 × 300/400 = P2 × 496/200

75/400 = 496 P2/200

0.1875 = 2.48P2

P2 = 0.1875 ÷ 2.48

P2 = 0.076 atm

Answer:

A. weak acid and its conjugate base

Explanation:

A buffer solution can be made with a weak acid and conjugate base or a weak base and conjugate acid.

This may help you:

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Acids_and_Bases/Buffers/Introduction_to_Buffers

Answer:

C-14 have 8 neutrons in the nucleus.

Carbon atoms with 8 neutrons have an atomic mass of 14 (6 protons + 8 neutrons = 14), so this isotope of carbon is named carbon-14.

hope it helps :)

Explanation:

Answer:

its d

Explanation:

edge 21

Explanation:

she could waited for the saturated vapour pressure to equal the prevailing atmospheric pressure

ergo boiling to take place seeing as she had gotten the first indication that boiling had started

Answer:

being peaceful

and washing up

Answer: The molarity of final solution is 0.244 M.

Explanation:

Given: [tex]M_{1}[/tex] = 1.00 M,       [tex]V_{1}[/tex] = 0.305 L

[tex]M_{2}[/tex] = ?,                [tex]V_{2}[/tex] = 1.25 L

Formula used to calculate the molarity f resulting solution is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\1.00 M \times 0.305 L = M_{2} \times 1.25 L\\M_{2} = \frac{1.00 M \times 0.305 L}{1.25 L}\\= 0.244 M[/tex]

Thus, we can conclude that the molarity of final solution is 0.244 M.

Answer:

well to me it is called natural energy

Answer:

See Explanation

Explanation:

1) According to the question, the reactivity of a metal is measured by the temperature of the solution after reaction. The higher the temperature of the solution, the greater the reactivity of the metal. Based on this criterion, the metals can be arranged in an order of reactivity as follows;

Mg> Zn > Fe.

2) The equation of the reaction is;

Mg(s) + 2H^+(aq) ------>Mg^2+(aq) + H2(g)

If we consider the changes in oxidation number from left to right;

The oxidation number of Mg changed from zero to +2

The oxidation number of H changed from +1 to zero

Recall that a redox reaction is a reaction in which the oxidation number of species changes from left to right in the reaction. Hence this reaction is a redox reaction.

The reducing agent experiences an increase in oxidation number. In this case, Mg is the reducing agent.

The oxidation half equation is;

Mg(s) ------> Mg^2+(aq) + 2e

The reduction half equation is;

2H^+(aq) + 2e ------> H2(g)

Answer:

one quarter of the original amount, so 0.25 g

Explanation:

Answer:

C

Explanation:

Answer:

the correct answer is option A. decrease

Answer:

wheresthepicture.-

Explanation:

Answer:

don't see a picture

Explanation:

Answer:

Its pressure will be 0.54 atm at 100 K.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

Gay-Lussac's law can be expressed mathematically as the quotient between pressure and temperature equal to a constant:

[tex]\frac{P}{T} =k[/tex]

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{1.75 atm}{323 K} =\frac{P2}{100 K}[/tex]

Solving:

[tex]P2= 100 k*\frac{1.75 atm}{323 K}[/tex]

P2= 0.54 atm

Its pressure will be 0.54 atm at 100 K.

Answer:

a.

[tex][H _{3}O {}^{ + } ] = 4.23 \times {10}^{ - 3} M[/tex]

b.

[tex][OH {}^{ - } ] = \frac{kw}{[H {}^{ + } ]} \\ [OH {}^{ - } ] = \frac{1 \times {10}^{ - 14} }{4.23 \times {10}^{ - 3} } \\ [OH {}^{ - } ] = 2.36 \times {10}^{ - 12} M[/tex]

c.

[tex]pH = - log[H {}^{ + } ] \\ pH = - log(4.23 \times {10}^{ - 3} ) \\ pH = 2.37[/tex]

d.

[tex]pOH = - log[OH {}^{ - } ] \\ = - log(2.36 \times {10}^{ - 12} ) \\ = 11.63[/tex]