What volume of silver metal will weigh exactly 10 kg. The density of silver is 10.5g/cm^3

Answers

Answer 1

Answer:

Answer:

V=952.380952381 cm3cap V equals 952.380952381

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A closed system initially containing 1×10^-3M H2 and 2×10^-3 at 448°C is allowed to reach equilibrium. Analysis of the equilibrium mixture show s that the concentration of HI is 1.87×10^ -3. Calculate Kc at 448°C for the reaction.

Answers

Answer:

1.74845

Explanation:

We have the following reaction:

I2 + H2 => 2 HI

Now, the constant Kc, has the following formula:

Kc = [C] ^ c * [D] ^ d / [A] ^ a * [B] ^ b

In this case I2 is A, H2 is B and C is HI

We know that the values are:

H2 = 1 × 10 ^ -3 at 448 ° C

I2 = 2 × 10 ^ -3 at 448 ° C

HI = 1.87 × 10 ^ -3 at 448 ° C

Replacing:

Kc = [1.87 × 10 ^ -3] ^ 2 / {[2 × 10 ^ -3] ^ 1 * [1 × 10 ^ -3] ^ 1}

Kc = 1.87 ^ 2/2 * 1

Kc = 1.74845

Which means that at 448 ° C, Kc is equal to 1.74845

Answer:

$K_c = 51$

Explanation:

[H2] = 10^-3

[I2] = 2*10^-3

[HI] = 0

in equilbiirum

[H2] = 10^-3 - x

[I2] = 2*10^-3 -x

[HI] = 0 + 2x

and we know

[HI] = 0 + 2x = 1.87*10^-3

x = ( 1.87*10^-3)/2 = 0.000935

then

[H2] = 10^-3 - 0.000935 = 0.000065

[I2] = 2*10^-3 -0.000935 = 0.001065

H₂ + I ⇄ 2 HI

Initially 1 × 10⁻³ 2 × 10⁻³

Change -9.35 × 10⁻⁴ -9.35 × 10⁻⁴ +1.87 × 10⁻³

At equil 6.5 × 10⁻⁵ 1.06 5 × 10⁻³ 1.87 × 10⁻³

HI increase by 1.87 × 10⁻³M

$K_c = ([HI]^2)/([H_2][I_2]) \n\n= ((1.87*10^-^3)^2)/((6.5*10^-^5)(1.065*10^-3)) \n\nK_c = 51$

Which actions would increase the rate at which salt dissolves in water? Stir the water. Crush the salt. Use less water. Heat the water. Cool the salt.

Answers

Answer:

Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.

hoose the best word or phrase to complete each sentence. 1.is a financial service that offers a kind of in the event of unforeseen damage, injury, or cost. 2.A is the cost of a type of insurance that is paid at regular intervals.

Answers

Answer:

Insurance, Protection, and Premium

Explanation:

Answer:insurance protection premium

Explanation trusttt lol

A chemist who is performing this reaction starts with 160.1 g of NH4NO3. The molar mass of NH4NO3 is 80.03 g/mol; the molar mass of water (H2O) is 18.01 g/mol. What mass, in grams, of H2O is produced?

Answers

the answer
the general equation of the reaction is
NH4NO3 -------------- N2O + 2H2O

The molar mass of NH4NO3 is 80.03
The mass of NH4NO3 is 160.1 g
so we can deduce that

nNH4NO3 = number of mole of NH4NO3 = 160.1 g / 80.03 =2 moles
by using proportion property

NH4NO3 -------------- N2O + 2H2O
1mole 1mole 2 moles
nNH4NO3 nH2O

the number of mole nH2O can be found by

1/ nNH4NO3 = 2 / nH2O

nH2O = 2 x nNH4NO3 = 2 x 2 = 4 moles
to find the mass, we use

mH2O = 4 moles x 18.01 g /mol = 36 g

Answer:

80.0

Explanation:

edge 2020

Arrange the following elements in order of increasing atomic radius : Rb , K , Na , Li

Answers

Generally, atomic radii have this property on the periodic table: as you go down or left, the radius of an atom gets larger.

With this logic, let's apply this to the problem above. Li is on the highest part of the table compared to the other elements. Below it is Na, then K, then Rb. From our rule, we know that as we go down on the table, the atomic radius gets larger.

Thus, Li has the smallest radius, and Rb has the largest radius.

FINAL ANSWER: Li, Na, K, Rb

Final answer:

The order of increasing atomic radius for the elements Li, Na, K, and Rb is Li

Explanation:

The arrangement of the following elements in increasing atomic radius: Li, Na, K, and Rb indicates that the atomic radius increases as we move down a group in the periodic table. This group of elements, Li, Na, K, and Rb, are all alkali metals and exhibit similar chemical behaviors. As the atomic number or Z increases, the atomic radius also increases. For example, Lithium (Li) has an atomic number of 3, Sodium (Na) 11, Potassium (K) 19, and Rubidium (Rb) 37. As we move down the group from Li to Rb, both Z and the atomic radius increase.

Learn more about Atomic Radius here:

brainly.com/question/13607061

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The isotope atoms differ in ?

Answers

An isotope is formed basically when the amount of neutrons are different than the amount of protons in the nucleus. Therefore, we'd get a variation in the atomic mass (number of neutrons and protons). This is what makes isotopes different.

So, the answer would be: Isotope atoms differ in neutrons.

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