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lbvjy [14]
3 years ago
5

Please help me out! I have lots of work to do and if you help it will relieve the stress.

Mathematics
1 answer:
Nina [5.8K]3 years ago
3 0

Answer:

<h2>2. Combining old and new observations.</h2>

Step-by-step explanation:

Through the passage, Nicholas Copernicus is introducing to the reader a new worlds, based on observations from the pass, and recent observations made by scientists. Basically, he's talking about a work where the reader is going to able to learn and be aware about the stars and planets movements in a way that no one could imagine before.

Copernicus specifically states that those observations are based on ancient and new data.

Therefore, the right answer is 2, because it's a combination of old and new observations.

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URGENT will give brilliant mark For the reaction 2Na + Cl2 ------ 2NaCl, how many grams of sodium chloride can be produced from
SVETLANKA909090 [29]

Answer:

825 g

Step-by-step explanation:

Here's my work:

500g Cl2 l   1mol Cl2  l  2 mol NaCl   l  58.5 g NaCl

                l   71 g Cl2    l  1 mol Cl2      l    1 mol NaCl  

= 823.94  - the rounding can be a little off

The first thing you have to do is convert the 500 g of Cl2 into moles.  So you get the mass of Cl which is 35.5, but Cl is diatomic by itself so you multiply 35.5 x 2 and get 71.   now on the third column you are comparing the mol ratios of the equation.  The equation is 2Na + Cl2 ---> 2NaCl, so you see that there is no coefficient in front of Cl2 so that means there is 1 mol, and then you see that in the product there is a  coefficient of 2 in front of NaCl so that means there is 2 moles.  Then finally you have to convert the moles backs into grams where you just add the masses of Na and Cl .  You multiply across the top  and then divide that number by the bottom row.

6 0
3 years ago
I will mark you brainliest <br> what is 1+1
Solnce55 [7]

21

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8 0
3 years ago
What is the slope of the line <br><br> A. 0<br> B. 1<br> C. -4<br> D. Undefined
ohaa [14]

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undefined slope

Step-by-step explanation:

The line is a vertical line

Vertical lines have an undefined slope

3 0
3 years ago
Read 2 more answers
Find the measure of angle A
mojhsa [17]

Answer:

105+50=155 so 180 subtract 155 is 25

7 0
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Find the highest common factor of 28 and 210 <br><br> Step by step <br><br> Please help
Yuri [45]

Hello there!

To find the GCF, we must list all the factors and then just spot the greatest factor.

28: 1, 2, 4, 7, 14, 28.

210 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70.

So 14 is the GCF. Hope this helps you!

~Just a felicitous girlie

#HaveAnAwesomeDay

SilentNature

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3 years ago
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