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3 years ago

14

When barium hydroxide and ammonium chloride react,the temperature of the mixture decreases.What kind of reaction is this?

1 answer:

GalinKa [24]3 years ago

7 0

Answer:

Endothermic

Explanation:

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Why can’t you see the stars very well at night like you could 50 years ago

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Answer:Artificial light from cities has created a permanent "skyglow" at night, obscuring our view of the stars. Here's their map of artificial sky brightness in North America, represented as a ratio of "natural" nighttime sky brightness. In the black areas, the natural night sky is still (mostly) visible.

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2 years ago

Helium gas in a cylinder is under 1.12atm pressure at 25.0C. What will be the pressure if the temperature increases to 37.0C?

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Answer:

$p_2=1.17atm$

Explanation:

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In this case, considering that the Gay-Lussac's law allows us to relate the temperature-pressure problems as directly proportional relationships:

$\frac{p_2}{T_2} =\frac{p_1}{T_1} \\\\$

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$p_2=\frac{p_1T_2}{T_1} \\\\p_2=\frac{1.12atm*310.15K}{298.15K}\\\\p_2=1.17atm$

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3 years ago

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