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abruzzese [7]
3 years ago
13

What pressure must be applied to keep a gas at 750 torr and 300 k at a constant volume of 200 mL if the temperature is raised to

450 k
Chemistry
1 answer:
babymother [125]3 years ago
8 0

Answer:1,125 torr

Explanation:

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How many ions are present in 75.0g of magnesium sulfate
Ostrovityanka [42]

Answer:

7.5×10²³ ions

Explanation:

Given data:

Mass of magnesium sulfate = 75.0 g

Number of ions = ?

Solution:

Number of moles of magnesium sulfate:

Number of moles = mass/molar mass

Number of moles = 75.0 g/ 120.36 g/mol

Number of moles = 0.623 mol

Magnesium sulfate formula: MgSO₄

Number of moles of ions in 1 mole of MgSO₄ = 2 mol (Mg²⁺ and SO₄²⁻)

Number of moles of ion in 0.623 moles of MgSO₄:

2 mole ×0.623 = 1.246 mol

Number of ions:

1 mole contain 6.022×10²³ ions

1.246 mol × 6.022×10²³ ions / 1mol

7.5×10²³ ions

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3 years ago
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Igoryamba

Answer:

Its b. Magnetic reversal

Explanation:

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Answer:

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Explanation:

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Which transformation represents light energy transforming into chemical energy?
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When an object reflects all light, we see (3 points) nothing white light dark blue light red light
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