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2 years ago

Which element has 32 protons in its nucleus? phosphorus cobalt germanium sulfur

Chemistry

2 answers:

eduard2 years ago

8 0

Germanium is the element that has 32 protons in its nucleus.

Misha Larkins [42]2 years ago

4 0

The element that has 32 protons in its nucleus is GERMANIUM.

The elements in the periodic table are arranged in the order of increasing atomic number. The atomic number of an element is actually the number of protons in that element. For the question given above, the atomic number of germanium is 32, this implies that it has 32 protons in its nucleus. For a neutral atom, the number of proton and electron in the atom is the same. Thus, germanium also has 32 electrons.

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Ostrovityanka [42]

Answer:D

Explanation:

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2 years ago

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sammy [17]

One of the two products of this reaction is carbonic acid (H2CO3), which immediately forms water and the gas you identified after exposure to the flaming and glowing splints. Write a balanced equation showing the decomposition of carbonic acid.

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2 years ago

How much energy is required to melt a 20.0lb bag of ice a 0°c? A pound (lb.) is equivalent to 0.4536. The Hfusion of ice is +6.0

erma4kov [3.2K]

To compute the energy, Q, needed to melt a certain amount of ice, n, in moles, we have

$Q = n \Delta H_{f}$

where the latent heat of fusion for ice is equal to 6.009 kJ/mol.

Now, since we have a 20.0 lb ice, we must first convert its mass to grams. Thus mass = (20.0)(1000)(0.4536) = 9072 g.

To find the number of moles present, we must recall that the molar mass of water (ice) is equal to 1.00794(2) + 15.9994 ≈ 18.01 g/mol. Hence, we have

$ice_{moles} = (\frac{9072 g}{1})(\frac{1 mol}{18.01 g}) =503.72 moles$

Now, to compute for the molar heat of fusion, Q,

$Q = (503.72)(6.009) = 3026.9 kJ$

Therefore, the amount of heat needed to melt the 20-lb bag of ice is equal to 3026.9 kJ.

Answer: 3026.9 kJ

6 0

2 years ago

Consider the equilibrium reaction: 3CIO-(aq) ↔ CIO3-(aq) + 2CI-(aq) The equilibrium constant Kc = 3.2 x 103. The following conce

blagie [28]

Answer:

Forward direction

Explanation:

The reaction quotient of an equilibrium reaction measures relative amounts of the products and the reactants present during the course of the reaction at particular point in the time.

Q < Kc , reaction will proceed in forward direction.

Q > Kc , reaction will proceed in backward direction.

Q = Kc , reaction at equilibrium.

It is the ratio of the concentration of the products and the reactants each raised to their stoichiometric coefficients. The concentration of the liquid and the gaseous species does not change and thus is not written in the expression.

Thus, for the reaction:

$3CIO^{-}_{(aq)}\rightleftharpoons CIO_3^{-}_{(aq)}+2Cl^{-}$

The expression is:

$Q=\frac {[CIO_3^{-}][Cl^{-}]^2}{[CIO^{-}]^3}$

Given,

[Cl⁻] = 0.50 mol/L; [ClO₃⁻] = 0.32 mol/L; [ClO⁻] = 0.24 mol/L

So,

$Q=\frac{0.32\times (0.50)^2}{(0.24)^3}$

Q = 5.7870

Since, Q < Kc ( $3.2\times 10^3$ )

The reaction will go in forward direction.

6 0

2 years ago

In an experiment, the density of an unknown liquid was calculated to be 0.78 g/ml. if the accepted value is 0.75 g/ml, calculate

Vikki [24]

Percentage error is the relative error your measured value is from the true or accepted value. The formula for percentage error is written below:

Percentage error = |True Value - Measured Value|/True Value * 100
Percentage error = |0.75 g/mL - 0.78 g/mL|/0.75 g/mL * 100
Percentage error = 4%

6 0

2 years ago