it really easy its true
Answer:
THIS IS THE IMAGE IF THIS HELPS
Can you please provide an image it would help more than you know
B. Measurements can be made only on models.
C. Models help scientists visualize things they can’t see.
D. Models are perfectly accurate representations of objects.
E. Scientists can analyze models to make predictions.
Answer:
Option (C).
Models help scientists visualize things they can'tsee
Explanation:
Since a long time models have been used by scientists to study about various things and phenomenons. A model helps the scientist community understand things that they cannot actually see or fathom. It can be thought of as a thinking tool, to help form explanations. It represents physical and touchable visualization of the theory rather than imaginative.
Models are useful simplifications to aid understanding. It can then be used to explain further phenomena and to make predictions of future behavior. Hence, models are very helpful for scientists in various studies.
Answer:
AI-generated answerScientists use models for several reasons:
1. Models make some things easier to understand: Models are simplified representations of complex phenomena or systems. They help scientists break down complicated concepts into simpler components, making it easier to understand and study.
2. Models help scientists visualize things they can't see: Many scientific phenomena occur at scales that are too small or too large to observe directly. Models allow scientists to visualize these phenomena by creating representations that are more manageable and observable. For example, scientists use models to understand atomic structures or celestial bodies.
3. Scientists can analyze models to make predictions: Models provide a way for scientists to test and analyze various scenarios without directly manipulating the real system. By adjusting variables in the model, scientists can make predictions about how the real system might behave under different conditions. This allows them to gain insights and make informed decisions without the need for costly or time-consuming experiments.
4. Measurements can be made only on models: In certain situations, it may be difficult or impossible to make direct measurements on the real system. In such cases, scientists can create models that replicate the behavior of the system and make measurements on the model instead. This allows them to gather valuable data and draw conclusions about the real system. It is important to note that while models are valuable tools for scientific understanding, they are not always perfectly accurate representations of objects or phenomena. Models are simplified versions of reality, and they may not capture all the complexities or intricacies of the real system. Scientists continuously refine and improve models based on new evidence and observations.
Explanation:
Every atom of the same
element has the same
atomic number.
Answer: True
Explanation: Every atom of the same element has the same atomic number of number of protons in its core. This is why chemists say that an atom is defined by its atomic number of the number of protons.
Unlike neutrons and electrons, you can't change protons. You can change the number of neutrons and it will still be the same element, but one is going to be a little bit heavier or a little bit lighter than another.
In addition, you can change electrons which creates
ions or charged atoms.
However, you can't change the protons.
For example, hydrogen has 1 proton in its nucleus no matter what and helium has 2 protons in its nucleus no matter what and so on.
The statement is true. Every atom of the same element has the same atomic number, which is the number of protons in an atom's nucleus. This is a unique value defining an element.
The statement 'Every atom of the same element has the same atomic number' is True. The atomic number of an element is unique to that element and determines its position on the Periodic Table. It represents the number of protons in an atom's nucleus and is the fundamental property that defines an element. All atoms of the same element will have the same number of protons, and therefore the same atomic number.
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Answer:
2.11 × 10²³ molecules of octane
Explanation:
Given data:
Mass of octane = 40.088 g
Molecules of octane = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
Number of moles of octane:
Number of moles = mass/ molar mass
Number of moles = 40.088 g / 114.23 g/mol
Number of moles = 0.351 mol
Number of molecules:
one mole of octane = 6.022 × 10²³ molecules of octane
0.351 mole of octane = 0.351 × 6.022 × 10²³ molecules of octane
2.11 × 10²³ molecules of octane