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Nadya [2.5K]
3 years ago
6

What is another name for groups of elements?

Chemistry
1 answer:
jeka943 years ago
6 0
They are called groups or family. Hope this helps 
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Which of these describes an ethical dilemma that drug designers could face?
LenKa [72]

The statement 'whether people should take medicine or if they should seek alternative treatments' describes an ethical dilemma that drug designers face.

<h3>What is drug development?</h3>

Drug development refers to all the processes from target drug identification to drug validation and commercialization.

Drug development involves different stages of development including preclinical and clinical trials.

Ethical dilemmas in drug development include the release of a drug that is ineffective when compared to parallel treatments.

Learn more about drug development here:

brainly.com/question/8187660

4 0
2 years ago
Fill in the blanks for the following statements: The rms speed of the molecules in a sample of H2 gas at 300 K will be _________
Anna007 [38]

Answer : The rms speed of the molecules in a sample of H_2 gas at 300 K will be four times larger than the rms speed of O_2 molecules at the same temperature, and the ratio \mu _{rms}(H_2)/\mu _{rms}(O_2) constant with increasing temperature.

Explanation :

Formula used for root mean square speed :

\mu _{rms}=\sqrt{\frac{3RT}{M}}

where,

\mu _{rms} = rms speed of the molecule

R = gas constant

T = temperature

M = molar mass of the gas

At constant temperature, the formula becomes,

\mu _{rms}=\sqrt{\frac{1}{M}}

And the formula for two gases will be,

\frac{\mu _{H_2}}{\mu _{O_2}}=\sqrt{\frac{M_{O_2}}{M_{H_2}}}

Molar mass of O_2 = 32 g/mole

Molar mass of H_2 = 2 g/mole

Now put all the given values in the above formula, we get

\frac{\mu _{H_2}}{\mu _{O_2}}=\sqrt{\frac{32g/mole}{M_{2g/mole}}}=4

Therefore, the rms speed of the molecules in a sample of H_2 gas at 300 K will be four times larger than the rms speed of O_2 molecules at the same temperature.

And the ratio \mu _{rms}(H_2)/\mu _{rms}(O_2) constant with increasing temperature because rms speed depends only on the molar mass of the gases at same temperature.

5 0
3 years ago
On the basis of the information below, the dissolution of FeF2(s) in acidic solution is A. thermodynamically favorable, because
antoniya [11.8K]

Since K3 is greater than 1, the reaction is thermodynamically favorable.

Data;

  • FeF2 is in an acidic solution
  • K2 > 1 is thermodynamically favorable
  • k3 > 1 is not thermodynamically favorable
  • K1<1 is not thermodynamically favorable

<h3>Hess Law</h3>

This states that the heat change in a given chemical reaction is the same irrespective of the number of process in which the reaction is effected.

Using Hess Law;

rxn_3 = rxn_1 * 2rxn_2\\k_3 = k_1 * k_2^2\\k_3 = 2*10^-^6 * (1*10^3)^2\\k_3 = 2

substituting this using Gibbs law,

\delta G^0_3 = -RT\ln K_3\\\delta G^0_3 < 0

Since K3 is greater than 1, the reaction is thermodynamically favorable.

Learn more on Hess law here;

brainly.com/question/12895682

8 0
2 years ago
3.264g of zonic chloride and 1.468g of zinc metal how much zinc obtained? Was all zinc possible from the recovery?
scoray [572]

3.264 g of ZnCl2 is 0.02394 moles. From the formula for ZnCl2, this is also the moles of Zn you should have gotten.


Atomic mass of Zn = 1.565 g is the theoretical yield you should have gotten


percent recovery = 1.468 g / 1.565 g * 100


5 0
3 years ago
Which type of reaction is described by the following equation? Na2O (s) + 2CO2 (g) + H2O (g) produces 2NaHCO3 (s)
TiliK225 [7]

Answer:

If the reaction is going from left to right it would be synthesis, if going right to left it would be decomposition.

Explanation:

Na2O (s) + 2CO2 (g) + H2O (g) = 2 NaHCO3 (s)

Left Side

Na = 2

O = 6

C = 2

H = 2

Right Side

Na = 2

O = 6

C = 2

H = 2

Ok so is balanced already, though initial equation in question had an error in regards to the left hand side the ) should have been an O.

Hmm

Na2O (s) + 2CO2 (g) + H2O (g) = 2 NaHCO3 (s)

If it was going from right to left would be decomposition

But going from left to right it would be synthesis

8 0
3 years ago
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