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kotegsom [21]
2 years ago
7

☆BRAINLIEST to correct answer☆​

Chemistry
1 answer:
ss7ja [257]2 years ago
3 0

Answer:

Explanation:

K2+H2O--------->KOH

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Question 1 of 10 What is molarity a measurement of? O A. The volume of liquid containing a dissolved substance B. The grams of a
Nuetrik [128]

Answer:

D

Explanation:

D. The number of moles of a dissolved substance

7 0
3 years ago
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Electrons surround the , of an atom in various energy levels called
nasty-shy [4]

surrounds the nucleus of an atom in various energy levels called orbitals.

Explanation:

Electrons surrounds the nucleus of an atom in various energy levels called orbitals.

According to the Bohr's model of an atom, the extra nuclear space is made up of electrons in specific spherical orbits called shells or energy levels.

  • The region of a maximum probability of where an electron is located is sometimes referred to as an electron cloud or orbital.
  • Electrons move round the nucleus in certain permissible orbits.
  • An electron in an energy level posses a definite amount of energy associated with it at that level.
  • Electrons moves through the energy levels by gaining or losing energy.

Learn more:

Bohr brainly.com/question/4986277

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7 0
3 years ago
14) A wheelbarrow is experiencing two forces. One is pushing 5 N to the east and the other 5 N in the exact opposite direction.
nasty-shy [4]
D. it isn't accelerating
7 0
3 years ago
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Which of the following equations is balanced correctly and has the correct products for the reactants RbNO3 and BeF2?3RbNO3 + 3B
zvonat [6]

Answer:

2RbNO₃ + BeF₂ → Be(NO₃)₂ + 2RbF, because Be keeps a 2+ charge throughout the reaction.

Explanation:

  • It is a double replacement reaction.
  • A double replacement reaction is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.
  • In this reaction, there is no change in the oxidation state of different atoms.
  • It is just a replacement reaction.

  • So, the right choice is:

<em>2RbNO₃ + BeF₂ → Be(NO₃)₂ + 2RbF, because Be keeps a 2+ charge throughout the reaction.</em>

5 0
3 years ago
What is the mass in grams of H₂ that can be formed from 54.6 grams of NH₃ in the following reaction?
kaheart [24]

Answer : The mass of H_2 is, 9.64 grams.

Explanation : Given,

Mass of NH_3 = 54.6 g

Molar mass of NH_3 = 17 g/mol

Molar mass of H_2 = 2 g/mol

First we have to calculate the moles of NH_3.

\text{Moles of }NH_3=\frac{\text{Given mass }NH_3}{\text{Molar mass }NH_3}

\text{Moles of }NH_3=\frac{54.6g}{17g/mol}=3.21mol

Now we have to calculate the moles of H_2

The balanced chemical equation is:

2NH_3(g)\rightarrow 3H_2(g)+N_2(g)

From the balanced reaction we conclude that

As, 2 mole of NH_3 react to give 3 moles of H_2

So, 3.21 mole of NH_3 react to give \frac{3}{2}\times 3.21=4.82 mole of H_2

Now we have to calculate the mass of H_2

\text{ Mass of }H_2=\text{ Moles of }H_2\times \text{ Molar mass of }H_2

\text{ Mass of }H_2=(4.82moles)\times (2g/mole)=9.64g

Therefore, the mass of H_2 is, 9.64 grams.

5 0
3 years ago
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