The solid material that is left behind in the distillation process is called the residue.
Distillation is the separation technique that involves the separation of two liquids with different boiling points.
The residue is the solid.part of a mixture after all other components of the mixture has been removed.
During the distillation process, after the heating of the mixture, the more volatile liquid changes to vapour.
The vapour is cooled by passing it through a condenser and collected in a liquid form known as distillate. while residue is left behind in a flask.
Therefore, the solid material that is left behind in the distillation process is called the residue.
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Answer:
The solid, called the residue, will be left behind in the filter paper while the liquid, called the filtrate, will pass through the filter paper.
Explanation:
Answer:
Big bang describes an ever expanding model of the universe.
Steady state theory explains a universe that always existed in the same state.
Explanation:
The two theories Big bang and Steady state are two of the theories that explain the origin of the universe in two different ways.
The Big bang model states that the universe is ever expanding and began from a singularity. It says that from that time universe is ever expanding creating new clusters of galaxies.
This was proved using mathematical formulae and models .
Steady state theory states that the density of matter remains unchanged due to the creation of matter. Observable universe is the same at any point of time is its summary.
Answer:
The big bang is the theory that describes how the universe emerges, it tells us that in the beginning all the space was contained in a space that was too small, and from there, it expanded rapidly until it reached the state of the universe that we know today, and that continues in expansion.
The theory of the oscillating universe describes a universe that begins and ends cyclically, it beging with something like the big bang, end ends in what is known as the big crunch, and so on. It says that the universe did not have a beginning but has always been restarting.
The theory of the static or steady state universe describes a type of universe uniform in space and time. And in which the universe has always remained the same regardless of where it is observed, wich is different from the other theories since the big bang theory says the universe had a beginning. In this theory it is claimed that the universe is homogeneous and isotropic. This theory is not very popular today.
Explanation:pH (7)
The degree of acidity or alkalinity (basic) is important in organisms. The body must constantly maintain a near neutral pH (7) in the blood and body tissues. To do this, the body produces buffers that can neutralize acids.
Organisms must maintain a specific pH level according to their biological requirements and environment. The majority of human body cells operate within a pH range of 7.2 to 7.6. Depending on their tolerances, microorganisms like neutrophiles, acidophiles, and alkaliphiles can thrive in varying pH levels.
In biological terms, the pH level is an important parameter that organisms need to maintain for survival and optimal functioning. Each type of organism has a different optimal pH range, often within a narrow window, depending on its biological requirements and environment.
Most cells in our bodies, for instance, operate within a pH scale ranging from 7.2 to 7.6. A deviation from this range could adversely affect the functioning of cells and proteins, potentially inducing coma or causing death.
Many microorganisms fall into categories like neutrophiles, acidophiles, or alkaliphiles, based on their optimal pH conditions. Neutrophiles, such as most bacteria, grow best at neutral pH close to 7.0. Acidophiles, on the other hand, grow best at a pH near 3.0, while alkaliphiles have an optimal pH range of 8 to 10.5.
These optimal pH values, minimum and maximum growth pH, cover a wide range, playing a significant role for microorganisms' survival and in food preservation. For example, the optimal growth pH of Salmonella spp. is between 7.0-7.5, but it can tolerate a minimum growth pH of around 4.2.
Extreme acidophiles and alkaliphiles can survive in astonishingly harsh conditions, with some acidophiles living at pH values near zero and alkaliphiles at pH levels around 13. However, conditions that are too acidic or alkaline could break down critical biological molecules like proteins and DNA, therefore posing substantial challenges for organisms' survival.
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