Answer:
D. A form of an atom with a different number of neutrons.
Explanation:
An Isotope has an equal number of protons but different numbers of neutrons in their nuclei.
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Answer: 0.469 J / g°C
Explanation:
1) Data:
m = 0.158 kg
Q = 2,150.0 J
ΔT = 61.0°C - 32.0°C
Cs = ?
2) Formula:
Q = m×Cs×ΔT
3) Solution
i) Solve for Cs: Cs = Q / [m×ΔT]
ii) Plug in the data and compute
Cs = 2,150.0 J / [158 g × (61.0°C - 32.0°C) ] = 0.469 J / g°C
B. Current atomic models show an atom's positively-charged particles concentrated in the center of the atom.
C. Current atomic models show that atoms do not have negatively-charged particles.
respectively
True
False
Answer:
false
Explanation:
The properties of compounds are often very different from the properties of the elements that make them. For example, water is made from two atoms of hydrogen bonded to one atom of oxygen. ... The elements calcium and chlorine combine to form the compound calcium chloride. Calcium is a soft, silvery metallic solid.
Answer:
the answer is False
Explanation:
False
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Explanation:
The principle used in the preparation of these salts is to dissolve
the cystine in an alcoholic alkali solution to which just sufficient
water to effect solution has been added, and, after filtering from
excess cystine, to precipitate the salt by addition of a suitable
indifferent solvent. While various solvents, such as acetone,
ether, or large amounts of alcohol caused precipitations, these were
either oily or amorphous. Only acetonitrile was found to possess
the power of initiating regular crystallization in the salt solutions.
While the solutions of the different salts require different amounts
of the solvent for complete precipitation, a partial substitution of
absolute ether for acetonitrile was found expedient in the case
of the most soluble of the salts, the K salt.
Answer:
It is simply a process of forming crystal.
Explanation: When salt is heated and dissolve in the liquid mainly water then its called saturated solution. When we further add salt and increase heat in order to dissolve it then it forcibly dissolve in liquid it's called supersaturated solution. After we slowly cool down the temperature then the salt we have put in supersaturated solution arises in the form of crystal. Hence its called crystalization.
Extensive
Chemical
Biological
Density is an intensive property, meaning it does not change as the amount of substance changes. It only depends on the type of substance, not its quantity.
Density is an example of an intensive property. Intensive properties don't change as the amount of the substance changes. They depend only on the nature of the substance, not its quantity. Other examples of intensive properties are boiling point, color, and temperature. On the other hand, extensive properties, such as volume and mass, change when the quantity of the substance changes.
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