Answer:
The frequencies of the two lines are:
a) 
b)
When we heat rubidium compound we will see red color.
Explanation:
c = speed of light
= wavelength of light
a) Frequency of the light when wavelength is equal to 
This frequency corresponds to red light
b) Frequency of the light when wavelength is equal to 
This frequency corresponds to violet light
When we heat rubidium compound we will see red color.
Because their molecules are more tightly packed. Massdensity = ---------- Volume
So more densely packed molecules means more mass per unit volume. Hence metals are denser than non-metals.
Answer:
1 mole=6.023×10^23 molecules
3.04×10^23 molecules× value of 1 mole
Explanation:
need thanks and make me brainiest if it helps you
Answer:
HBr + Mg(OH)2 —> MgBr2 + H2O.
To balance the above, we must do a head count of the individual atoms present to ensure they balance on both sides of the equation. To get the balance equation, add 2 in front of HBr and 2 in front of H2O as shown below:
2HBr + Mg(OH)2 —> MgBr2 + 2H2O
We can see clearly that the numbers of the individual atoms on the left side is the same on the right side
Based on the effect of temperature on a reaction, a change in temperature affects the rate constant K.
Based on the Arrhenius equation, the y-intercept gives the value of ln A.
From the value of the slope, the value of Ea is 42.1 J/mol.
<h3>What is the effect of temperature on a reaction?</h3>
A change in the temperature of a reaction acts to increase the rate of reaction.
- Change in temperature has no effect on the ideal gas constant.
- Change in temperature has no effect on the activation energy.
- Change in temperature has no effect on the concentration of reactants.
- Change is temperature can either lower or increase the rate constant of a reaction.
- Change in temperature has no effect on the order of reaction.
According to the Arrhenius equation, the y-intercept gives the value of ln A.
From the graph; slope = -Ea/R
Ea = -slope/R
Where;
- Ea is activation energy
- R is molar gas constant = 8.314 J/K.mol
- Slope = -350 K
Ea = -(-350)/8.314
Ea = 42.1 J/mol
Learn more about Arrhenius equation at: brainly.com/question/17205915
