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Sedbober [7]
3 years ago
12

HELPPPP PLEASEEEE Metal or Non-metal?

Chemistry
1 answer:
Tcecarenko [31]3 years ago
8 0

Answer:

Fluorine:non-metal

Bromine:non-metal

Hydrogen:non-metal

Beryllium:metal

Nitrogen:non-metal

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How many grams of KCIO3 are needed to produce 5.00 of O2 at STP?
Arlecino [84]
2KClO₃ → 2KCl + 3O₂

mole ratio of KClO₃ to O₂ is 2 : 3

∴ if moles of O₂ = 5 mol

then moles of KClO₃ = \frac{5 mol   *   2}{3}

                            = 3.33 mol


Mass of KClO₃ needed = mol of KClO₃ × molar mass of KClO₃

                                      = 3.33 mol × ((39 × 1) + (35.5 × 1) + (16 × 3) g/mol

                                      = 407.93 g
6 0
3 years ago
An air conditioning unit turns off once it reaches its goal temperature. The house warms up and the air conditioning unit turns
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Answer:

D ) feedback

Explanation:

When we use an air conditioner, it get turn off when reaches its required temperature and when the house warm up the air conditioning unit turns on again, that is an example of feedback.

The given condition is an example of negative feedback because in negative feedback, any change in the input is opposed by generating an output. Here also,  warming up of house (change in one direction) allows the air conditioning unit turns  on and it gives cool air (opposing that change).

Hence, the correct option is "D".

4 0
3 years ago
Which statement accurately describes radioactive dating?
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Explanation:

7 1
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Noah is conducting a science experiment and needs to analyze iron and sulfur. Which of the following will he compare to determin
qaws [65]

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molecular mass of each substance

molecular mass of each substance

Explanation:

7 0
2 years ago
It is important not to mix R-22 and R-410A refrigerants in the same container because:
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