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Virty [35]
2 years ago
15

Which of the following would improve the experimental design of this investigation? why?

Chemistry
1 answer:
Sliva [168]2 years ago
3 0

Answer:

ask your teaacher

Explanation:

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Pure substances are _______ in appearance ​
harina [27]

Answer:

constant appearance

Explanation:

this mean that a pure substance will have a constant appearance ,colour,density ,melting point and boiling point

3 0
3 years ago
Read 2 more answers
Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3NO2(g)+H2O(l)→2HNO3(l)+
Vesnalui [34]

Answer:

2 mol NO2

Explanation:

                                      3NO2(g)+H2O(l)→2HNO3(l)+NO(g)

from reaction                3 mol        1 mol

given                           11 mol          3 mol

for 3 mol NO2  -----   1 mol H2O

for x mol NO2  -----   3 mol H2O

3:x = 1:3

x = 3 *3/1 = 9 mol NO2

So, for 3 mol H2O are needed only 9 mol NO2.

But we have 11 mol NO2. So, NO2 is in excess, and

11 mol NO2 - 9 mol NO2 = 2 mol NO2 will be left after reaction.

3 0
3 years ago
What is the arrangement of the outer planets? What effect does their placement have on the planets?
Ahat [919]
The solar system's outer planets include Jupiter, Saturn, Uranus and Neptune. Their arrangement does not have any effect on the rest of the planets in the solar system, except for the fact that these planets are not in resonance to each other. 

Hope this helps!
3 0
3 years ago
Read 2 more answers
How many grams of copper would you need to produce 50.0g of silver? 1 Cu + 2 AgNO3 ----> 2 Ag + 1 Cu(NO3)2
suter [353]
Cu-Mg is slivers d,jK
3 0
2 years ago
Would you expect a heavily crosslinked polyethylene that has a glass-transition temperature of 0°c to be an elastomer, a thermos
musickatia [10]

The heavily crosslinked polyethylene that has a glass-transition temperature of 0°c to be an <u>thermoset (non-elastomer).</u>

A cross-linked kind of polyethylene has been known as cross-linked polyethylene, sometimes known by the acronyms PEX, XPE, or XLPE. It must be primarily utilized in residential water piping, high tension electrical cable insulation, hydronic radiant heating as well as cooling systems, construction management pipework systems, and infant play mats.

Tanks composed of linear polyethylene as well as XLPE are both constructed using heated resins to produce cured plastic. But because of the variations in how they are produced, the polyethylenes they produce have extremely varied structural strengths. Simply put, cross-linking is just the creation of links between polymer chains.

Therefore, the correct answer will be option (a).

To know more about polyethylene

brainly.com/question/15913091

#SPJ4

4 0
1 year ago
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