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babunello [35]
3 years ago
11

Copper has average atomic mass of 63.546 amu. It's two isotopes are Cu-63 (which is 69.17% abundant and has a mass of 62.9296 am

u) and Cu-65. From this information, calculate the mass of Cu-65.
Chemistry
1 answer:
garri49 [273]3 years ago
6 0

Answer: 69.152% → 63^Cu

30.848% → 65^Cu

Explanation:

As you know, the average atomic mass of an element is determined by taking the weighted average of the atomic masses of its naturally occurring isotopes.

Simply put, an element's naturally occurring isotopes will contribute to the average atomic mass of the element proportionally to their abundance.

Explanation:

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Say I grab a bunch of aluminum foil (9.5g) and ball it up. Aluminum has a specific heat of .9J/g*C. How much would the aluminum’
Brrunno [24]

Answer:

ΔT = 0.78 °C

Explanation:

Given data:

Mass of Al = 9.5 g

Specific heat capacity of Al = 0.9 J/g.°C

Temperature change = ?

Heat added = 67 J

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

67 J = 9.5 g × 0.9 j/g.°C × ΔT

67 J = 85.5 j/°C × ΔT

ΔT = 67 J  /  85.5 j/°C

ΔT = 0.78 °C

7 0
3 years ago
When ethane (
LuckyWell [14K]

Answer:

9 Moles

Explanation:

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7 0
3 years ago
Easy Question. Will mark brainliest
Xelga [282]

Answer:

Their components

Explanation:

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When magnesium burns in air, a white flaky ash of magnesium oxide is produced. Is the mass of magnesium oxide greater than, less
Norma-Jean [14]

Answer:

the mass of magnesium oxide will be less than the orginal peice of magnesium

Explanation:

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4 0
3 years ago
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you will divide 36 by 1 and multiply 2 on both sides which makes 72 by 2 so 2into 1 is 2 and 2 into 36 is 72

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