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kifflom [539]
3 years ago
14

How many electrons are present in 4He2+?

Chemistry
1 answer:
Charra [1.4K]3 years ago
4 0
4 and 2 electrons are present.
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How many neutrons are present in a nucleus whose atomic number is one and whose mass number is one?
nekit [7.7K]

Because the proton has a mass of 1 and a neutron has a mass of 1, we know that there is exactly one proton in the nucleus (because of the atomic number) which therefore tells us there are no neutrons as adding one would make the mass more than one.

8 0
3 years ago
All help is needed, thanks​
yarga [219]

Answer:

  1. smoke
  2. marshmallow
  3. paint
  4. Body spray

Explaination:

Firstly, what are colloids?

Colloids are a mixture of two substances:

  • one of those substances are insoluble and inseparable

There are 4 types of colloids:

  • Sol- Solid in a liquid
  • Emulsion- Liquid in a liquid
  • Foam- Gas in solid/liquid
  • Aerosol- Solid/liquid in gas

So on to the answers:

  • Smoke consists of solid and gas and since the solid is being carried by the gas, it is a solid in a gas (aerosol)
  • Marshmellow consists of tiny air bubbles and sugar(solid), the air bubbles is inside the solid making it a gas in a solid (foam)
  • Body spray turns gas into liquid after spraying it through the can, making it a liquid in a gas (aerosol)
  • Paint dries up to become solid which makes it a solid is a liquid (sol)

Hope y'all understand

3 0
3 years ago
What are two methods to solve the energy crisis?​
grin007 [14]

Possible Solutions to the Problem of Global Energy Crisis
Move Towards Renewable Resources. ...
Buy Energy-Efficient Products. ...
Lighting Controls. ...
Easier Grid Access. ...
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Perform Energy Audit. ...
Common Stand on Climate Change. We've got to reduce our dependence on foreign oil; it's a matter of homeland security. Fine. Nobody's arguing. But the solutions that get offered -- drilling in ANWR, mandating better automobile fuel efficiency, pushing ethanol -- don't really solve anything. They're politically impossible, or too expensive, or contrary to free-market forces. They're losers.
Energy-independence advocate Gal Luft looks for winners. The former lieutenant colonel in the Israel Defense Forces and counterterrorism expert fervently believes that the only way to make America safe is to make it energy independent. And so as executive director of the Institute for the Analysis of Global Security and cofounder of the Set America Free Coalition, he has set out to do just that.

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Luft advises Congress and security companies. He briefs industrial and environmental groups. Yet what separates him from other energy specialists are his pragmatic solutions. He doesn't peddle pie-in-the-sky political strategies. He's a realist. He has a single goal: freeing America from the grip of foreign oil. And he wants to do it now. At right are four steps he says we can -- and should -- take today.
4 0
2 years ago
What size container is needed to hold 7.00 mol of a gas at 342 K and 255 kPa? *
ValentinkaMS [17]
PV = nRT

I only know the valeu of R is you're using atm, so convert kPa to atm.

1 atm = 101.325 kPa

2.52 atm = 255 kPa

2.52atm(x) = 7(.0821)(342)

2.52atm(x) = 196.5

x = 78

78 liters

3 0
3 years ago
Which of these steps should always be followed for effective problem solving? a. buying a larger quantity of material than estim
Nesterboy [21]
The best steps that should always be used for effective problem solving would be C. Developing a plan and then implementing the plan.
3 0
3 years ago
Read 2 more answers
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