Which statement correctly describes the phosphate ion, PO3-/4?It is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion.
It is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom.
It is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion.
It is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.
Answers
B is not the correct answer. The -3 charge is distributed over the entire ion, so the correct answer is A.
Related Questions
Which sequence represents the relationship between pressure and volume of an ideal gas as explained by the kinetic-molecular theory?
Hydrogen bonding occurs in molecules when a _____________. (1 point)hydrogen atom forms a covalent bond with one other atom. hydrogen atom forms covalent bonds with more than one atom. hydrogen atom of a polarized molecule bonds with an electronegative atom hydrogen atoms form an ionic bond with one other atom
Each type of mineral has a chemical composition that isA. unique to that mineral B. similar to other minerals C. variable depending on where its found D. influenced by heat and light
In which substance do the molecules have the strongest attractions to one another ?
Answers
90 /30 = 3
3 x (CH2O) = C3H6O3
Final answer:
The molecular formula of a compound with an empirical formula of CH₂O and a molar mass of 90 g/mol is C₃H₆O₃. This is found by dividing the compound's molar mass by the molar mass of the empirical formula, and using the ratio to multiply the subscripts in the empirical formula.
Explanation:
The molecular formula of a compound can be determined using the molar mass and the empirical formula given. The empirical formula for the compound is CH₂O, which has a molar mass of approximately 30 g/mol (12 g for C, 1 g for H, and 16 g for O). If the molar mass of the compound is 90 g/mol, we can find the ratio of the molar mass of the compound to the empirical formula by dividing 90 g/mol by 30 g/mol, which gives us 3.
This means the molecular formula of this compound is three times the empirical formula. So, to obtain the molecular formula, you multiply each subscript in the empirical formula by 3. If you do this for CH₂O, you get C₃H₆O₃ which is the molecular formula of the compound.
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A. the mass number
B. the period number
C. the atomic number
D. the name of the element
When a nucleus has too many protons, it can absorb an electron and create _________.
A. a proton
B. a neutron
C. an electron
D. an alpha ray
Which of the following occurs in beta decay?
A. A neutron of an atom emits a high energy proton.
B. A neutron of an atom emits a high energy electron.
C. An electron of an atom emits a high energy proton.
D. A neutron of an atom emits a second high energy neutron.
What kind of ray is given off after electron capture?
A. a beta ray
B. a delta ray
C. an alpha ray
D. a gamma ray
Answers
number 2.a
number 3.b
number 4.d
Answer:
Which of the following occurs in beta decay?
Answer: A neutron of an atom emits a high energy electron.
Explanation:
Via Educere/ Founder's Education
The atom becomes more stable.
The electron gains energy.
Answers
Answer: Option (c) is the correct answer.
Explanation:
When energy is supplied to an electron then on absorption of energy it tends to move from a lower energy level to higher energy level.
And, when this electron moves from higher energy level to lower energy level then excess of energy absorbed by it is released in the form of visible light or radiation.
This emission of energy is also responsible for imparting color to a compound.
Thus, we can conclude that electron gains energy when an electron moves to a higher energy level.
Answer:
The electrons in an atom exist in various energy levels. When an electron moves from a lower energy level to a higher energy level, energy is absorbed by the atom. When an electron moves from a higher to a lower energy level, energy is released (often as light).
Explanation:
The electrons in an atom exist in various energy levels. When an electron moves from a lower energy level to a higher energy level, energy is absorbed by the atom. When an electron moves from a higher to a lower energy level, energy is released (often as light).
b. 6.2 M HF
c. 8.3 M HF
d. 15 M HF
Answers
HF = 1 + 19 = 20.0 g/mol
Number of moles :
124 / 20.0 => 6.2 moles
Volume = 2.4 L
M = n / V
M = 6.2 / 2.4
M = 2.6 M
Answer A
hope this helps!
Molarity =
moles of HF =
=
= 6.2 mol
∴ molarity of HF =
= 2.58 M
≈ 2.6 M
Answers
A yield of NH3 of approximately 98% can be obtained at 200°C and 1,000 atmospheres of pressure.
How many grams of Ny must react to form 1.7 grams of ammonia, NH3?
0.052 g
1.49
0.00589
2.8 g
Answers
Answer:
Explanation:
Here we have to use stoichiometry.
First of all, we have to calculate the mass of 100% of yield:
1.7 g ------- 98%
X -------- 100%
X = 1.73 g (approximately)
Second, we have to calculate the mass of N2 that is necessary to react to produce the mass of 1.73g of NH3. To do that, we have to use the Molar mass of N2 and NH3 and don't forget the stoichiometric relationship between them.
Molar Mass N2 : 14x2 = 28 g/mol
Molar Mass NH3: 14 + 3 = 17 g/mol
28g (N2) ------- 17x2 (NH3)
X ------------ 1.73 g
X = 1.42 g (approximately)