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guapka [62]
3 years ago
9

True or false plz help

Chemistry
2 answers:
ExtremeBDS [4]3 years ago
6 0

Answer:

It's true, I said true the other time but someone already answered so that's why i couldn't answer right now

Explanation:

scoundrel [369]3 years ago
4 0

Answer:

True

animals can only reproduce sexually

Explanation:

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Whats 2 + 2? correct answers only
spayn [35]

9

Explanation:

cause 2 + 2 is equal to 9

3 0
3 years ago
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andriy [413]

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protons and neutrons have different charges but they have approximately the same mass

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2 years ago
What is a calorimeter for?
zubka84 [21]
Calorimeter- an apparatus for measuring the amount of heat involved in a chemical reaction or other process.
4 0
3 years ago
A certain second-order reaction (B→products) has a rate constant of 1.30×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 224 s
soldier1979 [14.2K]

Answer:

       \large\boxed{\large\boxed{0.291M}}

Explanation:

By definition one <em>half-life</em> is the time to reduce the initial concentration to half.

For a <em>second order reaction </em>the rate law equations are:

              \dfrac{d[B]}{dt}=-k[B]^2

             \dfrac{1}{[B]}=\dfrac{1}{[B]_0}+kt

The <em>half-life</em> equation is:

            t_{1/2}=\dfrac{1}{k[A]_0}

Thus, substitute the<em> rate constant</em>  1.30\times 10^{-3}M^{-1}\cdot s^{-1} and the <em>half-life </em>time <em>224s</em> to find [A]₀:

           224s=\dfrac{1}{1.30\times10^{-3}M^{-1}\cdot s^{-1}[A]_0}

           [A]_o=0.291M

7 0
4 years ago
I need D and E please I know the rest
Westkost [7]

Answer:

K2 +Br ->2KBr

K + I ->KI

actually I don't know the e option but I had tried can u pls balance it urself

6 0
3 years ago
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