I need help fast. i will give you 85 points
Answers
Answer:
H3AsO4 → As2O5 + H2O
Explanation:
The first equation is balanced:
H3AsO4 → As2O5 + H2O
Here's a breakdown of the balanced equation:
Reactants:
H3AsO4: 3 hydrogen atoms, 1 arsenic atom, and 4 oxygen atoms
Products:
As2O5: 2 arsenic atoms and 5 oxygen atoms
H2O: 2 hydrogen atoms and 1 oxygen atom
As you can see, the number of atoms of each element is the same on both sides of the equation. This means that the equation is balanced.
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Which region of the visible light spectrum bends the most when passed through a diffraction grating?RedYellowGreenBlue
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hope it help you.
B. A Metallic bond
C. A Double bond
D. A Covalent bond
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The answer is A. An ionic bond.
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Answer: Option (c) is the correct answer.
Explanation:
Moh's scale is used to detect the harness of a mineral. This scale displays harness of 10 minerals.
According to Moh's scale, the hardness of minerals given in the option are as follows:
- Topaz = 8
- Talc = 1
- Diamond = 10
Graphite is not included in Moh's scale.
Thus, we can conclude that the hardest known mineral is diamond.
Answers
Answers
Answer:
At very low temperatures, gases expand less for a given pressure change than they do at high temperatures
The question's incomplete unfortunately, which observations?
(2) 79 (4) 197
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The atomic number of an element is the number of its protons. Here, the total number of electrons is 79 and thus the element s having 79 protons also. Thus, option 2 is correct.
What is protons?
An atom is composed of nucleus and and electrons. Protons and neutrons are located inside the nucleus. Electrons are revolving around the nucleus.Electrons are negatively charged particles and protons are positively charged whereas neutrons are neutral.
The atomic number of an element is the number of its electrons or protons. For a neutral atom the number of electrons and protons are equal. Thus all the positive charges are neutralized by equal number of negative charges.
The electrons are filled in different orbitals and from the configuration we can understand the number of electrons given is 79. Thus its number of electrons and protons is 79.
Hence, the number of protons for the element with the given electronic configuration is 79. The name of this element is gold.
To find more about protons, refer the link below:
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