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2 years ago

A gamma ray has a frequency of 2.88 x 1021 Hz. What does this mean?

Chemistry

1 answer:

bonufazy [111]2 years ago

3 0

Answer:

A gamma ray has a frequency of 2.88 x 10^21 Hz. What does this mean? It is how fast the wavelength is moving and is the number of how many pass a certain in a second. How does light emitted from a neon sign differ from light from the sun? Neon light only emits certain colors while sunlight emits all colors.

Explanation:

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A 220.0-mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275K. the piston is pushed until the sampl

nignag [31]

Using the general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

(105*220)/275 = (P₂*95)/310

(105*220)*310/275 = P₂*95

(105*220*310)/(275*95) = P₂

   274.11 = P₂

   P₂ = 274.11 kPa

   New Pressure = 274.11 kPa

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4 years ago

URGENT!!! How many molecules of water are produced when a molecule of C7H16 combusts

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3 years ago

Writing a pressure equilibrium constant expression Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4 NH

Sliva [168]

<u>Answer:</u> The equilibrium constant expression for the given equation is written below.

<u>Explanation:</u>

Equilibrium constant in terms of partial pressure is defined as the ratio of partial pressures of products to the partial pressures of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_{p}$

For the general chemical equation:

$aA+bB\rightleftharpoons cC+dD$

The expression of $K_p$ follows:

$K_p=\frac{p_C^c\times p_D^d}{p_A^a\times p_B^b}$

For the given chemical equation:

$4NH_3(g)+5O_2(g)\rightleftharpoons 4NO(g)+6H_2O(g)$

The expression of $K_p$ for above equation follows:

$K_p=\frac{(p_{H_2O}^5)\times (p_{NO}^4)}{(p_{NH_3}^4)\times (p_{O_2}^5)}$

Hence, the equilibrium constant expression for the given equation is written above.

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3 years ago

etermine the molar concentration of magnesium ions in a solution formed by mixing 100.0 mL of 0.100 M MgCl, solution with 100.0

marysya [2.9K]

Answer:

Molar concentration of magnesium ions in the final solution is 0.2 M.

Explanation:

$c=\frac{n}{V}$

c = Concentration of the solution

n = moles of the compound

V = volume of the solution in L

1) Molarity of $MgCl_2$ solution = 0.100 M

Volume of $MgCl_2$ solution = 100.0 mL = 0.1 L

Moles of $MgCl_2$ in 100 mL solution= n

$0.100 M=\frac{n}{0.1L}$

$n=0.01 mol$

$MgCl_2(aq)\rightarrow Mg^{2+}(aq)+2Cl^-(aq)$

1 mole of magnesium chloride gives 1 mol of magnesium ions and 2 moles of chloride ions.

Then 0.01 moles of magnesium chloride will give:

$x=\frac{1}{1}\times 0.01 mol=0.01 mol$ magnesium ions.

2) Molarity of $Mg_3(PO_4)_2$ solution = 0.100 M

Volume of $Mg_3(PO_4)_2$ solution = 100.0 mL = 0.1 L

Moles of $Mg_3(PO_4)_2$ in 100 mL solution= n'

$0.100 M=\frac{n'}{0.1L}$

$n'=0.01 mol$

$Mg_3(PO_4)_2(aq)\rightarrow 3Mg^{2+}(aq)+2PO_{4}^-(aq)$

1 mole of magnesium phosphate gives 3 mol of magnesium ions and 2 moles of phosphate ions.

Then 0.01 moles of magnesium phosphate will give:

$y=\frac{3}{1}\times 0.01 mol=0.03 mol$ magnesium ions.

After mixing both solutions:

Moles of magnesium ions = x + y = 0.01 mol + 0.03 mol = 0.04 mol

Total volume after mixing = 0.1 L + 0.1 L = 0.2 L

Molar concentration of magnesium ions in the final solution: $[Mg^{2+}]$

$[Mg^{2+}]=\frac{0.04 mol}{0.2 L}=0.2 mol/L$

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4 years ago

the scientific law of conservation of mass states that the total amount of mass in an isolated system remains constant. This mea

Verdich [7]

It describes how, when particles/mc/elements react, despite forming different substances the mass is neither created nor destroyed but only converted.

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3 years ago

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