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fgiga [73]
2 years ago
12

Which choice correctly describes the subatomic particles in the isotope 44ca?

Chemistry
1 answer:
Ksenya-84 [330]2 years ago
7 0

Answer:

20 protons, 20 electrons and 24 neutrons

Explanation:

In isotopes, the number of neutrons change, changing the mass number (of the atom)

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What is an example of conduction, raditaon convection
Tom [10]

Answer:

convection could be a pot on a stove, radiation could be the sun and heat waves, and conduction could be a cup with coffee.

Explanation:

Conduction occurs when two objects are in direct contact with each other.

Convection is the transfer of heat through liquids and gases. Convection occurs above a hot surface because hot air expands and rises and is replaced by cooler, denser air.

Radiate energy is given off by a hot object and directly absorbed by another cooler object. This cause the cooler object to get warmer. Radiation can occur even if no air is present.

3 0
3 years ago
A colorless solution is known to contain one of these ions. Which ion is present if adding dilute HCl produces a white precipita
marta [7]

Answer:

The correct answer is option D.

Explanation:

All the cations given belong to the group-1 cation and will give precipitate of their respective chlorides when HCl is added to their aqueous solution.

Ag^+(aq)+HCl(aq)\rightarrow AgCl(s)+H^+(aq)

Cu^{2+}+(aq)+2HCl(aq)\rightarrow CuCl_2(s)+2H^+(aq)

Hg_{2}^{2+}+(aq)+2HCl(aq)\rightarrow Hg_2Cl_2(s)+2H^+(aq)

Pb^{2+}+(aq)+2HCl(aq)\rightarrow PbCl_2(s)+2H^+(aq)

All the precipitates are insoluble in cold water but out of all these only lead(II) chloride is soluble in warm water.

4 0
3 years ago
Describe how intermolecular forces affect solvation.
4vir4ik [10]

Answer:

Solvation is affected by inter molecular forces in a sense that these attractive forces overcome the forces that holds the solute and solvent particles together making the solute particles separate form the solvent particles.

Explanation:

hope this helps

7 0
2 years ago
What is the role of the beaver in its ecosystem?
Arturiano [62]
Creating Wetlands. When beavers<span> make a dam, they slow the flow of water in the stream and, subsequently, a pond or area of wetland is formed. Roughly 85 percent off all native North American fauna rely on wetlands, so they're extremely important to the </span>ecosystem<span>.</span>
5 0
3 years ago
Read 2 more answers
Benzoic acid is a white crystalline powder used as a food preservative the compound contains 68.8% carbon, 5.0% hydrogen and 26.
KiRa [710]
So in this task first I think you should use the formula of the: Density/percentage

68.8% divided 26.2%= 2.625954198473282

2.625954198473282 X =

13.12977099236641
4 0
3 years ago
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