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Phoenix [80]
3 years ago
7

In potassium-argon dating, how does the proportion of remaining potassium in a rock or fossil change over time?

Chemistry
2 answers:
lara [203]3 years ago
8 0

Answer:

what was the answer?

Explanation:

wariber [46]3 years ago
7 0

Answer:

it decreases

Explanation:

pennfoster

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You burn a 15g jellybean to warm 50 mL of water, which increases the temperature of the water 25 °C. How many calories of heat a
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Answer:

Q = 375\,cal

Explanation:

The quantity of heat transfered from the jellybean to the water is:

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Q = \left(1\,\frac{g}{cm^{3}}\right)\cdot (15\,cm^{3})\cdot \left(1\,\frac{cal}{g\cdot ^{\circ} C} \right)\cdot (25\,^{\circ}C )

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Answer:

1. 505g is the mass of the aluminium.

2. The answer is in the explanation

Explanation:

1. To solve this question we need to find the volume of the rectangle. With the volume and density we can find the mass of the solid:

Volume = 7.45cm*4.78cm*5.25cm

Volume = 187cm³

Mass:

187cm³ * (2.702g/cm³) = 505g is the mass of the aluminium

2. When the temperature of a liquid increases, the volume increases doing the density decreases because density is inversely proportional to volume. And works in the same way for gases because the temperature produce more collisions and the increasing in volume.

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19E molar/molal Test
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64. Which of the followings can dissociate in water?
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Answer:

<h2>Hi there !</h2>

<h2>C. HCl</h2>

Explanation:

<h2>Reason :-</h2>

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