Answer:
Ununennium, also known as eka-francium or element 119, is the hypothetical chemical element with symbol Uue and atomic number 119. Ununennium and Uue are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkali metal, and the first element in the eighth period. It is the lightest element that has not yet been synthesized.
Explanation:
Explanation: For the given acid-base reaction, The molecular equation is:
Molecular equation:
As we know, is a strong acid, so in the ionic equation, it will completely dissociate into its respective ions.
The ionic equation for the given acid-base reaction is given by:
As nitrate ions are present on both the sides, so in the net ionic equation, it will get cancelled out, then the net ionic equation becomes:
Net ionic equation:
Answer:
D= there is the same number of each type of atoms on the right side and left side of the equation.
Explanation:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
<u>Answer:</u>
<u>For a:</u> The frequency produced by loudspeaker A is 200 Hz
<u>For b:</u> Loudspeaker B produces a higher frequency of vibrations.
<u>Explanation:</u>
To calculate the frequency of a loudspeaker, we use the formula:
......(1)
where,
= frequency
- <u>For loudspeaker A:</u>
Number of vibrations = 200
Time period = 1 second
Putting values in equation 1:
- <u>For loudspeaker B:</u>
Number of vibrations = 400
Time period = 1 second
Putting values in equation 1:
Hence, the frequency produced by loudspeaker A is 200 Hz and loudspeaker B produces a higher frequency of vibrations.
Answer:
They differ in a 5.86%
Explanation:
Hi, the Van der Waals equation for gases is:
For methane gas:
The conditions give{n are T=271.3 K, n=1.052mol and V=1.031L
The molar volume:
Replacing in Van der Waals :
In percentaje:
They differ in a 5.86%