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-Dominant- [34]
3 years ago
5

To make an observation we need to record ______ information.

Chemistry
1 answer:
kkurt [141]3 years ago
6 0
All of the above. When making observations, we should try to incorporate as many senses as possible.
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How many formula units are there in 103 g of NaCl?
charle [14.2K]

Answer:

1.059 x 10^24 formula units

Explanation:

103/58.44 = 1.76 moles NaCl

1.76 x 6.022 x 10^23 = 1.059 x 10^24

3 0
3 years ago
Calculate the root mean square (rms) average speed of the atoms in a sample of xenon gas at 0.15 atm and -55c
GrogVix [38]
Answer:
Vrms is 149.7266 m/sec

Explanation:
The root means square velocity of a gas can be calculated as follows:
Vrms = \sqrt{ \frac{3RT}{M}}
where:
R is the ideal gas constant = 8.3145
T is absolute temperature = -55 + 273 = 118 degrees kelvin
M is the molar mass of the gas = 131.293 grams = 0.131293 kg

Substituting with these givens in the above equation, we would find that the Vrms is 149.7266 m/sec

Hope this helps :)
7 0
4 years ago
Name the folowing ionic compound MgCl2
Blababa [14]

That is Magnesium Chloride.

4 0
4 years ago
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solmaris [256]

Answer:

1 is H

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the one below 14 is SI

16 is O

the one below 17 is Ci

the one below 18 is NE

Explanation:

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6 0
3 years ago
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Earth is tilted on its axis as it moves around the Sun. What does this cause?
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It causes days and nights 

4 0
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