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Jet001 [13]
3 years ago
12

A theory is a ____.

Chemistry
1 answer:
zepelin [54]3 years ago
6 0
A . well test explanation for a broad set of observations.
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Magnesium metal burning in oxygen gas t
Gelneren [198K]

Answer:

aluminium iodide

Explanation:

Al+ I2=AlI

3 0
3 years ago
The charcoal from ashes found in a cave gave 7.4 14C counts per gram per minute. Wood from the outer portion of a growing tree g
Morgarella [4.7K]

Answer:

C) 5970 y

Explanation:

Given;

initial amount of wood, N₀ = 15.3 cpm/g

remaining amount of wood (charcoal), N = 7.4 cpm/g

half life of carbon 14, t 1/2 = 5700 years

The age of the ashes can be calculated using the following formula;

N = N_0(\frac{1}{2})^{\frac{t}{t_1_/_2} }\\\\(\frac{1}{2})^{\frac{t}{t_1_/_2} } = \frac{N}{N_0} \\\\(\frac{1}{2})^{\frac{t}{t_1_/_2} } = \frac{7.4}{15.3} \\\\(\frac{1}{2})^{\frac{t}{t_1_/_2} } = 0.48366\\\\t = t_{1/2} Log\frac{1}{2} (0.48366)\\\\t = \frac{t_{1/2}ln(0.48366)}{-ln(2)} \\\\t = t_{1/2}(1.0479)\\\\t = 5700(1.0479)\\\\t = 5973 \ years\\\\t = 5970 \ years(nearest \ ten)

Therefore, the ashes are 5970 years

7 0
3 years ago
Differences between expansion of solid and liquid​
julia-pushkina [17]
Yep yep looks about right
7 0
2 years ago
Consider the following reversible reaction.
katovenus [111]

The equilibrium constant for the reaction is:

K subscript eq equals StartFraction StartBracket upper H subscript 2 EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket over StartBracket upper H subscript 2 upper O EndBracket superscript 2 EndFraction.

<h3>What is equilibrium constant? </h3>

The equilibrium constant (Kₑq) for a given reaction is simply defined as the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

For example, the equilibrium constant Kₑq for the reaction below is given as

2A <=> B

Kₑq = [B]/[A]²

<h3>How to determine the equilibrium constant </h3>
  • 2H₂O(g) <=> 2H₂(g) + O₂(g)
  • Equilibrium constant (Kₑq) =?

Kₑq = [H₂]²[O₂] / [H₂O]²

K subscript eq equals StartFraction StartBracket upper H subscript 2 EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket over StartBracket upper H subscript 2 upper O EndBracket superscript 2 EndFraction.

Learn more about equilibrium constant:

brainly.com/question/17960050

4 0
2 years ago
5. Why are the poppy seeds placed in different places (not together)?
Mademuasel [1]
In the atom model, the poppy seeds are placed in different places to represent the different position of electrons.
6 0
3 years ago
Read 2 more answers
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