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stiv31 [10]
3 years ago
7

What material often called a shooting stars as it enters the Earth’s atmosphere

Chemistry
2 answers:
aliina [53]3 years ago
7 0

Answer:

meteors

Explanation:

KIM [24]3 years ago
3 0

What would be a comet

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Which property of isotopes makes them suitable for determining the dates of ancient artifacts? atomic number of the isotope rate
siniylev [52]
Each isotope has a unique rate of decay, making them suitable for determining the dates of ancient artifacts. The answer is "rate of decay of the isotope."
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3 years ago
Which change favors the products in this reversible reaction n2o4(g)+58 kj 2no2 (g)?
Ksenya-84 [330]

<span>According to Le Chatelier's Principle, the position of equilibrium moves to counteract the change, the position of equilibrium will move so that the concentration of products of chemical reaction increase, if:</span>

<span>1) increase temperature, because this endothermic reaction.</span>

<span>2) increase concentration of reactant.</span>

<span>3) decrease pressure of the system, so reaction moves to direction where is more molecules.</span>

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7 0
3 years ago
Read 2 more answers
At the equilibrium point in the decomposition of phosphorus pentachloride to chlorine and phosphorus trichloride, the following
Hitman42 [59]

Answer: K_{eq} for the reaction is 5.55

Explanation:

Equilibrium constant is the ratio of the concentration of products to the concentration of reactants each term raised to its stochiometric coefficients.

The given balanced equilibrium reaction is,

                        PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)          

At eqm. conc.   (0.010) M     (0.15)  M   (0.37) M

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[Cl_2]\times [PCl_3]}{[PCl_5]}

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

K_c=\frac{(0.37)\times (0.15)}{(0.010)}

K_c=5.55

Thus the K_{eq} for the reaction is 5.55

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3 years ago
Be sure to answer all parts. Fluoride ion is poisonous in relatively low amounts: 0.2 g of F− per 70 kg of body weight can cause
Stells [14]

Answer:

200 liters of fluoridated drinking water would have to be consumed by as person to reach the toxic level.

Explanation:

Toxic level of fluoride ions = 0.2 g per 70 kg body weight

Concentration of fluoride ions in drinking water = 1 mg/ L = 0.001 g/L

1 mg = 0.001 g

Let the volume of drinking water consumed by person to reach the toxic level of fluoride concentration be V.

For 70 kg body weight 0.2 grams of fluoride ions will be toxic.

V\times 0.001 g/L=0.2 g

V=\frac{0.2 g}{0.001 g/L}=200 L

200 liters of fluoridated drinking water would have to be consumed by as person to reach the toxic level.

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3 years ago
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