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oksian1 [2.3K]
3 years ago
10

It takes 36 minutes for 100-grams of a radioactive substance to decay to 25-grams. What is the half-life of this substance?

Chemistry
2 answers:
kodGreya [7K]3 years ago
8 0

Answer:

18 minutes is the half life

Alex787 [66]3 years ago
8 0
18 minutes is correct
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URGENTTTTT What is the correct formula when Al+3 combines with CrO4-2
PIT_PIT [208]
A and C are incorrect because they are not complete transfer of valence electrons. Ionic bonds best to form a neutral molecule
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What is a solution in chemistry
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I grabbed these from my science notes, hope this helps.
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What is the molecular formula of a compound with an empirical formula P2O5 and a gram-molecular mass of 284 grams? And why?
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I really don’t know but

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2 years ago
Given the reaction: A + B <--> C + D
Lady_Fox [76]

Answer:

A.) 4.0

Explanation:

The general equilibrium expression looks like this:

K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }

In this expression,

-----> K = equilibrium constant

-----> uppercase letters = molarity

-----> lowercase letters = balanced equation coefficients

In this case, the molarity's do not need to be raised to any numbers because the coefficients in the balanced equation are all 1. You can find the constant by plugging the given molarities into the equation and simplifying.

K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }                                       <----- Equilibrium expression

K = \frac{[2 M] [2 M]}{[1 M] [1 M] }                                     <----- Insert molarities

K = \frac{4}{1  }                                                <----- Multiply

K = 4                                                <----- Divide

6 0
2 years ago
How do you solve for x?​
Ad libitum [116K]

Answer:

substitution is the best method or collecting like terms

Explanation:

3 0
2 years ago
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