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Reika [66]
3 years ago
15

What do you think about chemistry? define chemistry of the past ?​

Chemistry
1 answer:
Shalnov [3]3 years ago
5 0

Answer: Most people think positively about chemistry. Chemistry has had a good impact on the world, such as the impact of renewable energy, clean water, and technology.

Explanation:

Hope this was helpful :)

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Sulfuric acid reacts with aluminum hydroxide by double replacement. if 34 g of sulfuric acid react with 33 g of aluminum hydroxi
Lina20 [59]
Answer is: sulfuric acid is the limiting reactant.
Chemical reaction: 3H₂SO₄ + 2Al(OH)₃ → Al₂(SO₄)₃ + 6H₂O.
m(H₂SO₄) = 34 g.
n(H₂SO₄) = m(H₂SO₄) ÷ M(H₂SO₄).
n(H₂SO₄) = 34 g ÷ 98 g/mol.
n(H₂SO₄) = 0,346 mol.
m(Al(OH)₃) = 33 g.
n(Al(OH)₃) = 33 g ÷ 78 g/mol.
n(Al(OH)₃) = 0,423 mol.
From chemical reaction: n(H₂SO₄) : n(Al(OH)₃) = 3 : 2.

4 0
3 years ago
Hich sentence most accurately describes electrically charged objects?
Ket [755]

Answer:

They attract or repel other charged objects without touching them.

Explanation:

My chemistry teacher always says like repels like opposite attracts.

4 0
3 years ago
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What kind of energy would a textbook lose if you dropped it off a building
sladkih [1.3K]
The textbook would lose potential energy since its falling from a high height.
6 0
3 years ago
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A particular atom has 58 protons and 82 neutrons. what are the atomic number, mass number, and periodic table symbol of this iso
nika2105 [10]
The answers are name: Cerium, symbol: Ce, atomic number: 58, and atomic mass: 140.110
7 0
3 years ago
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How many moles of gold are equivalent to 1.204 × 1024 atoms?
LUCKY_DIMON [66]

Explanation:

It is known that the value of Avogadro's number is 6.022 \times 10^{23}.

Therefore, calculate moles of gold atoms as follows.

    Moles of gold atom = \frac{given number of atoms}{Avogadro's number}

                                    = \frac{1.204 \times 10^{24}}{6.022 \times 10^{23}mol^{-1}}

                                    = 0.199 \times 10 mol

                                    = 1.99 mol

Thus, we can conclude that 1.99 mol of gold atoms are equivalent to 1.204 \times 10^{24} atoms.

7 0
3 years ago
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