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Mkey [24]
3 years ago
15

3. How do you observe stuff?

Chemistry
2 answers:
mote1985 [20]3 years ago
8 0

Answer:

by looking at the and researching for super long

Explanation:

amid [387]3 years ago
8 0
By reaching or looking
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Compare the electronegativity of H and O in the polar covalent bonds of a water
ExtremeBDS [4]

Answer:

The O atom will tend to attract the electrons.

Explanation:

The electronegativity of O (3.5) is much higher than H (2.1), which means it is more likely to attract electrons. The higher the electronegativity, the more attractive.

7 0
3 years ago
The Sun is a yellow star that's both average in brightness and temperature and is classified as
Roman55 [17]

Answer:

Classifying stars according to their spectrum is a very powerful way to begin to understand how they work.  As we said last time, the spectral sequence O, B, A, F, G, K, M is a temperature sequence, with the hottest stars being of type O (surface temperatures 30,000-40,000 K), and the coolest stars being of type M (surface temperatures around 3,000 K).  Because hot stars are blue, and cool stars are red, the temperature sequence is also a color sequence.  It is sometimes helpful, though, to classify objects according to two different properties.  Let's say we try to classify stars according to their apparent brightness, also.  We could make a plot with color on one axis, and apparent brightness on the other axis, like this:

Explanation:

7 0
3 years ago
Some states authorize a to make healthcare decisions ------- for patients who can't make them because they're incapacitated. O a
Tom [10]

Explanation:

A student flips four different coins at the same time. Which choice shows all of the possibilities for the results of the coin toss? (H = heads, T = tails)

A HH, TT, HT, TH

B HHHT, HTTT, HHTT

C HHH, TTT, HTH, HTT

D HHHH, HTHH, HTTH, HTTT, TTTT

7 0
3 years ago
What is the final volume of NaOH solution prepared from 100.0 mL of 0.500 M NaOH if you wanted the final concentration to be 0.1
suter [353]

Answer:

The final volume of NaOH solution is 30ml

Explanation:

We all know that

              V1S1 = V2S2

             or V1= V2S2÷S1

             or  V1= V2×S2×1/S1

             or   V1=100×0.15×1/0.50

                    V1= 30

∴30 ml NaOH solution is required to prepare 0.15 M from 100ml 0.50 M NaOH solution.

5 0
3 years ago
Explain why the atomic radius of fluorine is smaller than that of lithium​
Sladkaya [172]

1. Common knowledge : Go to the right of periodic table, the atomic radius is decreasing

2. Flurine has 9 protons and lithium has 3 protons. you know that the electron is attracted with the centre of the atom, that's why more proton, more 'energy' that attract to the centre and that's why it make the shape of the atom is smaller

4 0
3 years ago
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