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KIM [24]
3 years ago
5

Please select the word from the list that best fits the definition Uses ultrasound waves that reflect off of boundaries

Chemistry
1 answer:
andrezito [222]3 years ago
4 0
Sonar...............
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The energy level necessary to enable a reaction to a cure is called the activation true or false
matrenka [14]
The correct answer is true. It was introduced by Svante Arrhenius that activation energy is minimum amount of energy needed to be supplied or released for a chemical reaction to proceed. It is the energy needed to overcome for a reaction to occur.
3 0
4 years ago
Given:
marusya05 [52]

Answer:

92.6 g.

Explanation:

  • The balanced equation is:

CaC₂ + N₂ → CaCN₂ + C.

  • It is clear that 1.0 mole of CaC₂ reacts with 1.0 mole of N₂ to produce 1.0 mole of CaCN₂ and 1.0 mole of C.
  • We need to calculate the no. of moles of 265.0 g of CaCN₂ produced using the relation:

n = mass / molar mass = (265.0 g) / (80.102 g/mol) = 3.308 mol.

  • We should get the no. of moles of N₂ needed to produce 3.308 mol of CaCN₂.

∵ 1.0 mole of N₂ produces → 1.0 mole of CaCN₂.

<em>∴ 3.308 mole of N₂ produces → 3.308 mole of CaCN₂.</em>

  • Now, we can get the grams of N₂  consumed to produce 265.0 g of CaCN₂:

∴ The grams of N₂ = n x molar mass = (3.308 mole)(28.0 g/mol) = 92.63 g = 92.6 g.

7 0
4 years ago
Write the corresponding word equations for the reactions between;<br> (a) metals and water
Salsk061 [2.6K]

Answer:

M + H2O = MO + H2

Explanation:

When metals react with water they form oxides of the metal and hydrogen gas

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Which of the following samples of water will contain the most heat?
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Answer:

The answer is D- make sure you give good rate

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Sigmund Freud's psychoanalytic theory appears to have been heavily influenced by the ____________ models of his time.
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The bank will represent  evolutionary. hope that helped
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4 years ago
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