The true statement is B. With identical masses for both metals, the final temperature of the two will be more aligned with 498 K rather than 298 K, as iron's specific heat capacity is significantly greater than that of gold's.
Answer:
Central metal oxidation state: +2
Coordination number: 6
Overall charge: -2
Explanation:
For the ion complex:
Na₂[Cr(NH₃)₂(NCS)₄]
The central metal is chromium, with NH₃ and NCS as the ligands.
NH₃ acts as a neutral ligand, while NCS carries a negative charge.
The entire complex has a charge of:
2Na⁺ + [Cr(NH₃)₂(NCS)₄]⁻² → -2
Since each NCS contributes -1 and there are four NCS, the Cr must possess an oxidation state of +2 to achieve an overall charge of -2.
With 2 NH₃ and 4 NCS attached, the coordination number sums to 2+4 = 6
I trust this clarifies the matter!
The specific heat of titanium metal is 0.524 J/g°C. Given that Q = 1.68 kJ, which equates to 1680 Joules, with a mass of 126 grams and initial and final temperatures of 20°C and 45.4°C respectively, the specific heat is computed using the formula Q = (mass)(ΔT)(Cp), where ΔT = T₂ - T₁ = 25.4°C. Plugging in the numbers leads us to Cp = 0.524 J/g°C.
Radio - A radio station sends out radio waves that are received by a radio receiver.
<span>Microwaves - A microwave oven heats food using microwave radiation.</span>
<span>Infrared - Infrared light is utilized by TV remotes to send signals to a sensor on the TV, enabling functions like volume adjustment and channel selection.</span>
<span>Visible light - Comes from sunlight or light bulbs.</span>
<span>Ultraviolet - UV lamps are used for tanning and for verifying the authenticity of currency.</span>
<span>X-rays - Machines for chest X-rays and backscatter X-ray scanners for airport security utilize X-rays.
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Gamma rays - <span>Gamma rays are utilized in medical instruments for eliminating cancer cells and for sterilizing medical supplies.</span>