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valentina_108 [34]
3 years ago
11

Chemistry is the study of ________. Chemistry is the study of ________. matter transformations of matter only macroscopic phenom

ena only microscopic phenomena both A and B
Chemistry
1 answer:
Lostsunrise [7]3 years ago
6 0

Answer: Correct answer is both A and B.

Explanation:

Chemistry is a branch of science that deals with different substances in recognizing the matter present in them.

For example, chemistry deals with states of matter like solid, liquid or gas.

Also, it tells us about how different substances present in nature react or what is their composition and properties.

Basically, chemistry helps us knowing nature of a matter and how it can be transformed.

Thus, we can conclude that chemistry is the study of matter and its transformation.

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How many milliliters of a 0.275 M NaOH solution is required to react with 0.450 L of CO2 gas
padilas [110]

Volume of NaOH required to react = 145.5 ml

<h3>Further explanation</h3>

Reaction

CO₂(g) + 2 NaOH(aq)  ⇒Na₂CO₃(aq) + H₂O(l)

The volume of CO₂ : 0.45 L

mol CO₂ at STP (O C, 1 atm) ⇒ at STP 1 mol gas 22.4 L :

\tt mol~CO_2=\dfrac{0.45}{22.4}=0.02

From the equation, the mol ratio of CO₂ : NaOH = 1 : 2, so mol NaOH :

\tt mol~NaOH=\dfrac{2}{1}\times 0.02=0.04

Then volume of NaOH :

\tt V=\dfrac{n}{M}\\\\V=\dfrac{0.04}{0.275}\\\\V=0.1455~L\rightarrow 145.5~mL

5 0
3 years ago
Aluminum has density of 2.7g/cm3.<br><br> What is the mass of 35 cm3 aluminum in g?
Sveta_85 [38]

Answer:

density= 2.7 g/cm3

volume= 25 cm3

mass = density× volume

= 35×2.7

= 94.5 g

7 0
3 years ago
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nadezda [96]

Answer:

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Explanation:

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8 0
3 years ago
How would you separate the following ions by selective precipitation Ag + , Pb 2+, Cu 2+.​
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3 years ago
What is the Celsius temperature of 1 mole of a gas that has an average kinetic energy of 3,866 joules?
Anna [14]
Temperature can be calculated using the average kinetic energy. The ideal gas equation is being related to the average molecular kinetic energy.
<span>
PV = nRT
</span><span>PV = (2/3) N(0.5mv^2)
</span><span>
By substituting and simplifying, we eventually get the equation.
</span><span>
KE = (3/2)RT</span>
T = 3866 x 2 / 8.3145 x 3 = 309.98 K or 36.83 degrees Celsius
6 0
4 years ago
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