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Aleksandr-060686 [28]
3 years ago
7

Which statement correctly describes protons and neutrons?

Chemistry
1 answer:
a_sh-v [17]3 years ago
8 0

Answer:

B

Explanation:

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Crazy boy [7]
Usual s I have no idea sorry
6 0
4 years ago
How are the melting points and boiling points of molecular compounds usually different from those of ionic compounds
pentagon [3]
Melting points and boiling points of molecular compound are usually lower than ionic compounds. This is so as only a small amount of energy is required to overcome the weak intermolecular forces of attraction (Van de Waals forces) thus having lower m.p. and b.p.

Ionic compounds require a large amount of energy to overcome the strong electrostatic forces of attraction between the ions, hence having higher mp and bp
6 0
3 years ago
How many atoms of Lead are in a 62.7 g sample of Lead(II) permanganate?
Alexandra [31]

Answer:

\large \boxed {8.48 \times 10^{22}\text{ atoms}}

Explanation:

1 mol of Pb(MnO₄)₂contains 1 mol of Pb atoms.

1. Moles of Pb

\text{Moles of Pb} = \text{62.7 g Pb(MnO$_{4}$)}_{2} \times \dfrac{\text{1 mol Pb(MnO$_{4}$)}_{2}}{\text{445.07 g Pb(MnO$_{4}$)}_{2}}\\\\\times \dfrac{\text{1 mol Pb}}{\text{1 mol  Pb(MnO$_{4}$)}_{2}} = \text{0.1409 mol Pb}

2. Atoms of Pb

\text{Atoms of Pb} = \text{0.1409 mol Pb } \times \dfrac{ 6.022  \times 10^{23}\text{ atoms Pb }}{\text{1 mol Pb }}\\\\= \large \boxed {\mathbf{8.48 \times 10^{22}}\textbf{ atoms Pb }}

8 0
3 years ago
Classify each reaction as combination, decomposition, single replacement, double replacement, or combustion. c2h4(g) + 3o2(g) →2
soldier1979 [14.2K]
If combined with oxygen. the reaction is usually combustion. in this case, it is the combustion of ethene
5 0
3 years ago
What is the mass of one mole of hydrogen molecules?
Lilit [14]

Answer:

2 grams

Explanation:

One MOLE of hydrogen atoms contains the same number of atoms as the number of hydrogen molecules in one MOLE of hydrogen molecules, i.e., Avagadros number. However, one mole of hydrogen atoms has a mass of 1 gram while one MOLE of hydrogen molecules has a mass of 2 grams.

4 0
3 years ago
Read 2 more answers
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