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3 years ago

Which scientist was the first to use the telescope in astronomy? Copernicus Newton Kepler Galileo

Chemistry

1 answer:

coldgirl [10]3 years ago

8 0

The scientist that was the first to use the telescope in astronomy was Newton

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Solid Al(NO3)3 is added to distilled water to produce a solution in which the concentration on nitrate, [NO3^-], is 0.10 M. What

VikaD [51]

Answer:

The concentration of nitrate ion $NO_{3}^{-}$ is 0.033 M.

Explanation:

$Al(NO_{3})_{3} \rightarrow Al^{3+} + NO_{3}^{-}$

1 mole of $[Al^{3+}]$ = 3 mole $NO_{3}^{-}$

Let $[NO_{3}^{-}]$ = 3y

then according to above reaction,

$[Al^{3+}]$ = y

$[NO_{3}^{-}]$ = 0.10 M (given)

$[Al^{3+}]$ = ?

3y = 0.10 M

$y = \frac{0.1}{3}$

y = 0.033 M

So ,concentration of $[Al^{3+}]$ = y = 0.033 M

5 0

3 years ago

A reaction is designated as exergonic rather than endergonic when _____.

dem82 [27]

Answer:

Reaction is called exergonic when ΔG is negative i.e. ΔG < 0

Explanation:

The Gibbs free energy represents the spontaneity or feasibility of a given chemical reaction at constant pressure and temperature and is given by the equation:

ΔG = ΔH - TΔS

Here, ΔG - change in the Gibbs free energy

ΔS - change in the entropy

ΔH - change in the enthalpy

T - temperature

If the value of ΔG for a chemical reaction is positive i.e. ΔG > 0, then the given chemical reaction is said to be nonspontaneous. Such a reaction is called endergonic.

Whereas, if the ΔG value for a chemical reaction is negative i.e. ΔG < 0, then the given chemical reaction is said to be spontaneous. Such a reaction is called exergonic.

7 0

4 years ago

No two units of matter can occupy the same_______ at the same_______ .

riadik2000 [5.3K]

First blank- space
second blank- time
Hope this is extra helpful but also check your notes! have a wonderful day and stay safe is you are up north in the snow!

5 0

4 years ago

Read 2 more answers

I have a chemistry question that I am needing help on please?

aliina [53]

What country and grade are you?
Please tell me! I’m going to help you

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3 years ago

Using the Lewis dot Symbol Illustrate how the atoms are bonded in each of the following ionic compounds; thanks

Gre4nikov [31]

I’m not really sure but i think it’s 2.

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3 years ago