Answer: The atom with 6 protons and 6 neutrons and an atom with 6 protons and 7 neutrons are the isotopes of same element.
Explanation:
Isotopes are defined as the chemical species that belong to the same element but differ in their mass number.
This also means that the chemical species have same number of protons and electrons but different number of neutrons.
Atomic number is defined as the number of protons or electrons that are present in a neutral atom.
Atomic number = number of protons = number of electrons
Mass number is defined as the sum of number of protons and neutrons that are present in an atom.
Mass number = Number of protons + Number of neutrons
From the given options:
The elements having same number of protons will be the isotopes of same element.
Hence, the atom with 6 protons and 6 neutrons and an atom with 6 protons and 7 neutrons are the isotopes of same element.
Answer : The correct option is,
Explanation : Given,
The value of pH of HCl = 6
As we know that,
pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.
The formula of pH is :
Now put all the given values in this formula, we get the concentration of hydrogen ion.
Therefore, the concentration of hydrogen ion is,
made of pieces of lava
volcanic soil
material fills in valleys
cinder cone
bowl-shaped depression
shield volcano
wide summit, gentle slope
lava plateau
rich in nutrients
Answer:
cinder cone: made of pieces of lava
shield volcano: wide summit, gentle slope
volcanic soil: rich in nutrients
caldera: bowl shaped depression
lava plateau: material fills in valleys
Explanation:
it’s right
Answer:
Caldera, Bowl-Shaped depression
Shield volcano, Wide summit, Gentle slope
Lava plateau, Material fills in valleys
Volcanic soil, Rich nutrients
Cinder Cone, Made of pieces of lava
Explanation:
Got it right on edge
The experiments 'The Iced Tea Debate' and 'The Salty Soup' illustrate different physical changes and energy transfers in the context of the Law of Conservation of Matter and Energy.
In 'The Iced Tea Debate', the independent variable could be the temperature of the tea, the dependent variable could be how quickly the ice melts and the control variable could be the amount of tea used in each trial. The Law of Conservation of Matter and Energy states that matter and energy cannot be created or destroyed in an isolated system. In this case, the ice melting is a physical change, and the energy transferred is thermal energy from the tea to the ice.
In 'The Salty Soup,' the independent variable could be the amount of salt added, the dependent variable could be the taste of the soup, and the control variable could be the type of soup used. The added salt dissolving into the soup is a physical change, and no noticeable energy transfer occurs.
One example of conservation of matter and energy in everyday life is the process of photosynthesis in plants. The plant absorbs sunlight (energy), carbon dioxide, and water, and converts them into glucose and oxygen, thus conserving matter and energy.
#SPJ5
In these demonstrations, matter and energy were conserved, as total mass and energy stayed constant. Significant phase and energy transformations were observed, like the melting of ice and the dissolving of salt. The total mass before and after the transformations remained the same, demonstrating the law of conservation of mass.
Matter and energy can be described as being conserved in a variety of systems because they can neither be created nor destroyed, only transferred between objects or converted from one form to another. In 'The Iced Tea Debate' and 'The Salty Soup' demonstrations,
Variables would include: Independent variable: the substance added (be it ice tea or salt); Dependent variable: physical and chemical changes observed; Control variables: the initial conditions of the system, like temperature and pressure.
When analyzing the results of each of these demonstrations, you should observe energy transfers, in the form of heat in both scenarios.
Moreover, there would be conservation of matter observable in both scenarios. This can be proven by extracting and weighing all substances before and after their reactions, summing up the total mass, which should stay constant.
To answer the questions:
#SPJ3