When you go down a group, does the tendency for a metal to react (become duller) increase or decrease?

How is kinetic energy of particles and temperature related

Rufina [12.5K]

Answer:

The higher the temperature, the faster the particles move, the lower the temperature, the slower.

4 0

2 years ago

Explain why the quantum number set (3, 2, 3, -½) is not possible for an electron in an atom

Triss [41]

Ok the ML (the 3rd number) is not legit because the ML value can only be from -L to L (the second value)

7 0

3 years ago

Calculate the total energy, in kilojoules, that is needed to turn a 46 g block

neonofarm [45]

Answer: The total energy, in kilojoules, that is needed to turn a 46 g block of ice at -25 degrees C into water vapor at 100 degrees C is 11.787 kJ.

Explanation:

Given: Mass = 46 g

Initial temperature = $-25^{o}C$

Final temperature = $100^{o}C$

Specific heat capacity of ice = 2.05 $J/g^{o}C$

Formula used to calculate the energy is as follows.

$q = m \times C \times (T_{2} - T_{1})$

where,

q = heat energy

m = mass

C = specific heat capacity

$T_{1}$ = initial temperature

$T_{2}$ = final temperature

Substitute the values into above formula as follows.

$q = m \times C \times (T_{2} - T_{1})\\= 46 g \times 2.05 J/g^{o}C \times (100 - (-25))^{o}C\\= 11787.5 J (1 J = 0.001 kJ)\\= 11.787 kJ$

Thus, we can conclude that the total energy, in kilojoules, that is needed to turn a 46 g block of ice at -25 degrees C into water vapor at 100 degrees C is 11.787 kJ.

7 0

2 years ago

You have come down with a nasty cold and would like to understand why the virus that infected you is making you feel so lousy. W

umka21 [38]

Answer:

a) The volume is 5.236x10⁻¹³L

b) The molarity of a single virus is 1.91x10¹² mol/L

c) The molarity for a 100 virus particles is 1.91x10¹⁴ mol/L

Explanation:

a) Given:

D = diameter of the cell = 10 μm

r = radius = 10/2 = 5 μm

The volume of the spherical cell is equal:

$V=\frac{4}{3} \pi r^{3} =\frac{4}{3} \pi *(5)^{3} =523.6\mu m^{3}$

If 1 μm³ = 1x10⁻¹⁵L, then 523.6 μm³ = 5.236x10⁻¹³L

b) The molarity is:

$M=\frac{number-of-moles}{volume-of-solution}$

For a single virus within the cell

$M=\frac{1}{5.236x10^{-13} } =1.91x10^{12} mol/L$

c) For a 100 virus particles the molarity is:

$M=\frac{100}{5.236x10^{-13} } =1.91x10^{14} mol/L$

4 0

3 years ago

In which chemical reaction will be heat content of the reactance be more that of the products

Anuta_ua [19.1K]

A reaction in which energy is absorbed from the surroundings is called anendothermic<span> reaction. In </span>endothermic<span> reactions the enthalpy of the products is greater than the enthalpy of the reactants. Because reactions release or absorb energy, they affect the temperature of their surroundings.

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3 0

3 years ago