3 years ago

Low frequency waves are ______apart. *

Chemistry

1 answer:

aivan3 [116]3 years ago

7 0

Low frequency waves are far apart

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What is the overall equation for this chemical reaction?

ahrayia [7]

Answer:

Mg(s) + 2H⁺ → Mg²⁺(aq) + H₂.

Explanation:

To obtain the overall reaction, we sum the two half-reactions and omit the similar species in the reactants and products sides.

We have two reactions:

oxidation reaction:

Mg(s) → Mg²⁺(aq) + 2e.

Reduction reaction:

2H⁺ + 2e → H₂.

So, we add the two half-reactios and obtain the overall reaction:

Mg(s) + 2H⁺ → Mg²⁺(aq) + H₂.

3 0

4 years ago

phillip morris cigaretteshave 5mg tar and 0.4 mg nicotine per cigarette and 20 cigarettes per pack how many packs of cigarettes

Shalnov [3]

Answer: A solution is made by dissolving 27.8 g of nicotine (Molar Mass = 160 g/mol) in 145 g of cyclohexane (C6H12) to form 142 mL of solution. Calculate the mole fraction of the solute and the molarity, respectively, of this solution.

Explanation:

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3 years ago

Americium-241 is an alpha emitter used in household smoke detectors and K-40 is a positron emitter used to date rock samples. Th

VMariaS [17]

Answer:

Np-237, Ar-40.

Explanation:

Alpha particle is positively charged particle having a mass of 4 unit. Hence,when alpha is removed from any isotope it produces a element having mass 4 units less than original isotope that was before emission. Americium 241 isotopes used in the smoke detector which emit an alpha particle to produce neptunium-237.

Potassium-40 emits positron which is having negative charge to lower one proton and increase one neutron number in the particle and in such way it will produce $^{40}Ar_{18}$ not $^{40}Ca_{20}$