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Vitek1552 [10]
3 years ago
13

How many atoms are in 2.50 mol of hydrogen?

Chemistry
2 answers:
mash [69]3 years ago
6 0

Answer:

No. of atoms in 2.50 of hydrogen = 1.50\times 10^{24}\ atoms

Explanation:

Moles of Hydrogen = 2.50 mol

Number of atom = Moles × Avogardro's no.

Avogadro's no. = 6.02 \times 10^{23}atoms

Number of atom = Moles × Avogardro's no.

=2.50 \times 6.02 \times 10^{23}\\=1.50\times 10^{24}\ atoms

So, no. of atoms in 2.50 of hydrogen = 1.50\times 10^{24}\ atoms

Nimfa-mama [501]3 years ago
5 0
To do this, you must multiply the number of moles by the Avogadro's number, <span>6.0221409e+23

So, with 2.50 mol,
</span><span>
2.50 mol H * 6.02 * 10^23 atoms H / 1 mol H = 1.51 * 10^24 atoms H.

To make that statement clearer, in 2.50 mol of Hydrogen, there are 1.51x10^24 atomsH</span><span><span /></span>
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how can you tell if a compound is covalent or ionic from the formula, and how each is named differently?
kumpel [21]

Answer:

ionic compounds contain a metal and a non metal

covalent compounds contain only non metals

Explanation:

Each type of compound is named according to different rules.

5 0
3 years ago
Choose the molecule(s) that will only show two signals, with an integration ratio of 2:3, in their 1H NMR spectrum.
mrs_skeptik [129]

The question is missing the molecules in which the integration ratio of 2:3 will be observed. The complete question is given in the attachment.

Answer:

Molecule (a), (c), and (f) will show two peaks with the integration ratio of 2:3 in their 1H NMR spectrum

Explanation:

In the 1H NMR spectrum, the peak area is dependent on the number of hydrogen in a specific chemical environment. Hence, the ratio of the integration of these signals provides us with the relative number of hydrogen in two peaks. This rationale is used for the assignment of molecules that will give 2:3 integration ratio in the given problem.

  • Molecule (a) have two CH₂ and three CH₃ groups. Hence, it will give two peaks and their integration ratio becomes 2:3 (Answer)
  • Molecule (b) contains three chemical environments for its hydrogen atoms
  • Molecule (c) have a single CH₂ and CH₃ group giving integration ratio of 2:3 (Answer)
  • Molecule (d) will give two peaks but their ratio will be 1:3 because of two hydrogens of CH₂ and six hydrogens from two CH₃ groups
  • Molecule (e) have three CH and three CH₃ groups, so their ratio will become 1:3
  • Molecule (f) contains four CH and two CH₃ groups, giving two peaks. So, the integration ratio of their peaks is 2:3 (Answer)
  • Molecules
  • (g)
  • and
  • (h)
  • both have two CH and two CH₃ groups giving two peaks with the integration ratio of 1:3

3 0
3 years ago
Based on this chemical equation KNO3 --&gt; KNO2 + O2
TEA [102]
It’s decomposition. The compound is being broken apart into two different things aka decomposing.
6 0
3 years ago
Consider an AB3 molecule in which A and B differ in elec-tronegativity. You are told that the molecule has an over-all dipole mo
Alborosie

Answer:

(b) Trigonal planar

Explanation:

The molecular geometry is the one that stabilizes better the bonds and the free electron pairs. If the molecule is nonpolar (overall dipole moment zero), so, there's no free electron pairs at the central atom. So, the molecule has the central atom A surrounded by three atoms of B, which is the trigonal planar geometry.

5 0
3 years ago
A solution is made by dissolving 42.3g of potassium hydroxide in 329g of water what is the molality of the solution?
xxMikexx [17]

Answer:

2.34 molality

Explanation:

Mole weight of KOH ( using periodic table ...rounded to 3 s.f.) =

              56.1 gm/mole

Number of moles in 43.2 g

  43.2 g  /  56.1 gm / mole =.770 mole

molality = .770 mole / .329 kg = 2.34 m

7 0
1 year ago
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