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3 years ago

4. The woman's auxiliary at the Fire Company need to make 250 one pound pie crusts for a fund raiser. If

Chemistry

1 answer:

Andre45 [30]3 years ago

7 0

Answer:

i rly did this for the extra points sry btw its d tho

Explanation:

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What is the half-life in minutes of a compound if 75.0 percent of a given sample decomposes in 40.0 minutes? Assume first-order

yaroslaw [1]

Answer:

See below

Explanation:

.75 = 1/2^(40/h)

log .75 / ( log 1/2) = 40 / h

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2 years ago

What is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20°C?

lidiya [134]

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4 years ago

The equilibrium constant, Kc, for the following reaction is 0.967 at 650 K. 2NH3(g) N2(g) 3H2(g) When a sufficiently large sampl

AlekseyPX

Answer: Concentration of $NH_3$ in the equilibrium mixture is 0.31 M

Explanation:

Equilibrium concentration of $H_2$ = 0.729 M

The given balanced equilibrium reaction is,

$2NH_3(g)\rightleftharpoons N_2(g)+3H_2(g)$

Initial conc. x 0 0

At eqm. conc. (x-2y) M (y) M (3y) M

The expression for equilibrium constant for this reaction will be:

3y = 0.729 M

y = 0.243 M

$K_c=\frac{[y]\times [3y]^3}{[x-2y]^2}$

Now put all the given values in this expression, we get :

$K_c=\frac{0.243\times (0.729)^3}{(x-2\times 0.243)^2}$

$0.967=\frac{0.243\times (0.729)^3}{(x-2\times 0.243)^2}$

$x=0.80$

concentration of $NH_3$ in the equilibrium mixture = $0.80-2\times 0.243=0.31$

Thus concentration of $NH_3$ in the equilibrium mixture is 0.31 M

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3 years ago

Why can strong winds lead to more flooding during Hurricane

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All tropical cyclones can produce widespread torrential rains, which cause massive flooding and trigger landslides and debris flows.

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Which statement describes the relative energy of the electrons in the shells of a calcium atom?

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3 years ago