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xxMikexx [17]
2 years ago
5

What is sinking cold air and rising warm air?

Chemistry
1 answer:
Shkiper50 [21]2 years ago
4 0
Since hot air is less dense than cold air, the hot air rises and the cold air sinks. Extra: Warm air topically brings rain cuz it forms over oceans and that’s why hurricanes form over sea and eventually move toward land
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Hydrogen reacts with 0.771 g of carbon to form 0.90 g of a compound. What is the mass percent of hydrogen in the compound
morpeh [17]
Answer: 14.3%

Explanation: In order to find the mass percent of hydrogen in this compound, you must determine how many grams of hydrogen you'd get in 100 g of compound. 

In your case, you know that an unknown mass of hydrogen reacts with 0.771 g of carbon to form 0.90 g of hydrocarbon, which is a compound that contains only carbon and hydrogen. 

Use the total mass of the hydrocarbon to determine how many grams of hydrogen reacted with the carbon.

Now, if 0.90 g of this compound contain 0.129 g of hydrogen, it follows that 100 g of this compound will contain.

So, if 100 g of this compound contain 14.33 g of hydrogen, it follows that the mass percent of hydrogen is 14.3%


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4 0
3 years ago
Read 2 more answers
Which of these lists the energies of the sublevels, from highest to lowest? A. f &gt; d &gt; p &gt; s B. d &gt; p &gt; s &gt; f
Pie
A because for example in n=4 we have all of these sub levels  4s is completed sooner than 4p and so
4 0
3 years ago
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Explain why a steel object continues to rust even after its outer layers have corroded.
Aliun [14]

Answer:

Explanation:

During that process of being exposed to air and water while being left outside or in the elements for an extended period of time, a variety of different types of rusts can form, but the most common form is Fe2O3. Rust only forms on the outside of a metal surface because it requires exposure of oxygen and water to rust.

7 0
3 years ago
When a 10 mL graduated cylinder is filled to the 10 mL mark, the mass of the water was measured to be 9.925 g. If the density of
Vlada [557]
Measured volume = 10 ml 
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density = 0.9975 g/ml
density = \frac{mass}{volume} 
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Percentage Error = \frac{measured volume - Actual volume}{actual volume} x 100 
= \frac{10 - 9.95}{9.95} x 100 = 0.5 % error
5 0
3 years ago
Write the symbols for the following isotopes: Its atoms contain 50 electrons and 70 neutrons
Veronika [31]
Since this element has 50 electrons you know that it has 50 protons. The number of proton= the atomic number. Atomic number 50 is tin. The atomic symbol for tin is Sn and the weight is 120. So this is the tin 120 isotope
6 0
3 years ago
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