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ser-zykov [4K]
3 years ago
5

Many people think that summer is warmer because the earth is closer to the sun at that time of year. explain why

Chemistry
1 answer:
Marysya12 [62]3 years ago
5 0
Summer days are warmer because the path of the sun is longer and we have more direct sunlight during that time
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Explain how sodium and calcium react with water. explain with equations
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Reaction of sodium with water

Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic. During the reaction, the sodium metal may well become so hot that it catches fire and burns with a characteristic orange colour. The reaction is slower than that of potassium (immediately below sodium in the periodic table), but faster than that of lithium (immediately above sodium in the periodic table).

2Na(s) + 2H2O → 2NaOH(aq) + H2(g)

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Number the elements sodium, magnesium, and potassium in the predicted order of ionic radius from the largest (1) to the smallest
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Control of Blood pH by respiratory rate.
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A) During this procedure ( hypoventilation ) The CO2 in the arterial blood vessels and the lungs increases and this drives the PH level in the system lower, and the equilibrium will shift to the right. this is because the Blood-PH level is controlled by CO2 - bicarbonate buffer system

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 They can change properties completely 
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<span>The elements become part of the original compounds</span>
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3 years ago
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