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2 years ago

Why do scientist need government fundings?

Chemistry

2 answers:

Veseljchak [2.6K]2 years ago

8 0

Becuase they need special equipment and things like that that may not be available in the state i think

oksano4ka [1.4K]2 years ago

6 0

They need special equipment

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Scientists decide that in an experiment on fish, all the fish will be fed the same amount of food

Liula [17]

This is a controlled variable

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3 years ago

Which of the following is not a natural

Morgarella [4.7K]

Answer:

cup...................

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2 years ago

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What is the average atomic mass of hafnium given the following abundance information on the isotopes?

Goryan [66]

Answer:

178.55

Explanation:

176 × 0.05+ 177 × 0.19 + 178 × 0.27 + 179 × 0.14 + 180 × 0.35 = 178.55

7 0

2 years ago

Determine the equilibrium constant, Keq, at 25°C for the reaction

adelina 88 [10]

Explanation:

The given chemical reaction is:

$2Br^- (aq) + I_2(s) Br_2(l) + 2I^- (aq)$

$E^ocell=oxidation potential of anode + reduction potential of cathode\\$

The relation between Eo cell and Keq is shown below:

$deltaG=-RTlnK_e_q\\delta=-nFE^o cell\\=>nFE^o cell=RTlnK_e_q\\lnK_e_q=\frac{nF}{RT} E^o cell$

The value of Eo cell is:

Br- undergoes oxidation and I2 undergoes reduction.

Reduction takes place at cathode.

Oxidation takes place at anode.

Hence,

$E^ocell= (-1.07+0.53)V\\=-0.54V$

F=96485 C/mol

n=2 mol

R=8.314 J.K-1.mol-1

T=298K

Substitute all these values in the above formula:

$ln K_e_q=\frac{2mol* 96485 C/mol}{8.314 J.K^-^1.mol^-^1x298K} \\\\lnK_e_q=77.8\\K_e_q=e^7^7^.^8\\=>K_e_q=6.13x10^3^3$

Answer:

Keq=6.13x10^33

3 0

2 years ago

What is the volume of 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)?

uysha [10]

Given:
<span> 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)
Required:
volume of CL2
Solution:
Use the ideal gas law
PV = nRT
V = nRT/P
V = (2.1 moles Cl2) (0.08203 L - atm / mol - K) (273K) / (1 atm)
V = 47 L</span>

5 0

2 years ago