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balu736 [363]
3 years ago
14

Lithium (Li) has a charge of +1, and oxygen (O) has a charge of –2. Which is the chemical formula? LiO2 LiO Li2O Li2O2

Physics
2 answers:
LiRa [457]3 years ago
6 0

Answer:

The results is                  Li₂O

Explanation:

n a chemical reaction, the electron miner in the formula must be balanced, that is, the number of positive and negative charges is the same

In this case, oxygen has a valence of -2 that is, it can give two electrons and lithium has a valence of +1, therefore two lithium atoms are needed for the charges to be neutral, therefore the chemical formula is

The results is                  Li₂O

3241004551 [841]3 years ago
6 0

Answer:

Li2O

Explanation:

just took the test on edge

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If a transformer has 50 turns in the primary winding and 10 turns on the secondary winding, what is the reflected resistance in
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Answer:

The reflected resistance in the primary winding is 6250 Ω

Explanation:

Given;

number of turns in the primary winding, N_P = 50 turns

number of turns in the secondary winding, N_S = 10 turns

the secondary load resistance, R_S = 250 Ω

Determine the turns ratio;

K = \frac{N_P}{N_S} \\\\K = \frac{50}{10} \\\\K = 5

Now, determine the reflected resistance in the primary winding;

\frac{R_P}{R_S} = K^2\\\\R_P = R_SK^2\\\\R_P = 250(5)^2\\\\R_P = 6250 \ Ohms

Therefore, the reflected resistance in the primary winding is 6250 Ω

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Answer:

W= 210 N

Explanation:

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