The muscles in your body make up about percent of your body weight.
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Answer:
The answer is 40-50 percent I did it and it was correct.
Explanation:
I would not mind Brainliest pls.
Related Questions
How does the number of protons compare to the number ofelectrons in an anion?a There are more electrons than protons.b There are more protons than electrons.cThere is no consistent relationship between thenumbers of protons and electrons.d There are equal numbers of protons and electrons.
What circulation of water is in the water cycle
The measurement of moles of solute per kilogram of solvent is known asa. molarity. b. molality. c. parts per million.
Water molecules attract to one another to form what kind of bonds?
The molar mass of NH3 is 17.03 g/mol. The molar mass of H2 is 2.0158 g/mol. In a particular reaction, 0.575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures?
0.1
0.102
0.10209
0.1021
Answers
Answer : The mass of in grams is 0.102g.
Solution : Given,
Molar mass of = 17.03 g/mole
Molar mass of = 2.0158 g/mole
Given Mass of = 0.575 g
First we have to calculate the moles of .
=
= 0.0337 moles
The given balanced equation is,
From the above reaction, we conclude that
2 moles of produced from 3 moles of
then the 0.0337 moles of produces to give
moles of
The moles of = 0.0505 moles
The mass of = Moles of
× Molar mass of
= 0.0505 moles × 2.0158 g/mole = 0.10179 g
The mass of in the correct number of significant figures is 0.102 g.
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The question is incomplete, this is the complete question;
In the process of attempting to characterize a substance, a chemist makes the following observations. Which are physical properties and which are chemical properties?
(a) The substance is a silvery white, lustrous metal.
(b) The substance melts at 649 ∘C
(c) The substance boils at 1105 ∘C.
(d) The density of the substance at 20 ∘C is 1.738 g/cm³.
(e) The substance burns in air, producing an intense white light.
(f) The substance reacts with chlorine to give a brittle white solid.
(g) The substance can be pounded into thin sheets or drawn into wires.
(h) The substance is a good conductor of electricity.
Answer:
(a) Physical
(b) Physical
(c) Physical
(d) Physical
(e) Chemical
(f) Chemical
(g) Physical
(h) Physical
Explanation:
(a) The substance is a silvery white, lustrous metal - is appearance which is physical.
(b) The substance melts at 649 ∘C metling point is a physical measurement
(c) The substance boils at 1105 ∘C boiling point is a physical measurement
(d) The density of the substance at 20 ∘C is 1.738 g/cm3 how heavy a substance is,is physical.
(e) The substance burns in air, producing an intense white light. Burning is a chemical change. It is a reaction of a substance with oxygen
(f) The substance reacts with chlorine to give a brittle white solid. This is a chemical reaction as the question says.
(g) The substance can be pounded into thin sheets or drawn into wires. Ductility is a physical change, the substance remains chemically unchanged
(h) The substance is a good conductor of electricity. Any conductivity is physical, the substance remains chemically unchanged
Final answer:
The substance in question is likely a pure metal, more specifically Magnesium, because of its documented properties such as lustrous appearance, ability to be drawn into wires, and high electrical conductivity. Its properties like high melting and boiling points and its reactions suggest it could be from Group 1, but its ability to be formed into sheets and wires and its high conductivity suggest it's not an ionic compound like sodium chloride.
Explanation:
The substance described in the question seems to be an example of pure metal due to the properties like lustrous appearance, ability to be drawn into wires or pounded into sheets, and high conductivity of electricity. However, some of the properties like reaction with chlorine, production of intense white light upon burning in air, and its high melting and boiling points suggest that it could be a Group 1 element such as sodium or potassium, which are known for these characteristics. Coupled with information of its density and its ability to form brittle white solid upon reaction with chlorine, it seems to likely be Magnesium, a silvery-white lustrous metal.
Furthermore, ionic compounds like sodium chloride have high melting and boiling points, conduct electricity when molten, and ions are freed to move allowing conductivity. However, such compounds, unlike pure metals, cannot be drawn into wires or pounded into sheets and are usually brittle solids, which would make it less likely that the substance in question is an ionic compound.
The most confident identification will be based on the substance's observed physical and chemical properties and their comparison to known properties of pure metals and ionic compounds.
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Explanation:
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Let's solve this!
An Arrhenius acid is a substance that, when dissolved, forms stainless hydrogen (H +)
An Arrhenius base is a substance that when dissolved produces oxhydryl ions (OH-).
For example:
hydrochloric acid: HCl
Nitric Acid: HNO3
Final answer:
An Arrhenius acid is a substance that releases hydrogen ions when dissolved in water. Examples can range from strong acids, like hydrochloric acid, to weak acids like vinegar. The concept was formulated by Svante Arrhenius, underlining the importance of hydrogen in the definition of acids.
Explanation:
An Arrhenius acid is specifically defined as a substance which, when dissolved in water, releases hydrogen ions (or protons). This includes strong acids like hydrochloric acid (HCl), which releases all of their hydrogen ions in solution, thereby becoming completely ionized. However, this also includes weak acids like vinegar, or acetic acid, which do not ionize completely and still leave some hydrogen ions within the compound.
These properties of acids were formulated by Svante Arrhenius in the late 19th century, underlining the importance of hydrogen in defining acids. The ability of acids to release hydrogen cations led to their definition as acid substances.
Thus, if a substance releases hydrogen ions into a solution when dissolved in water, it can be described as an Arrhenius acid.
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Answer:
It is 33.8.
Explanation: