On the pH scale, a solution with a pH of 7 would be classified as which of the following? A weak acid, weak base, neutral, or pure H2O?
Answers
Related Questions
Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal ions (such as Mn or Fe): 2H2O2(aq) ---> 2H2O(l) + O2(g)What volume of pure O2(g), collected at 27C and 746 torr, would be generated by decomposition of 125 g of a 50.0% by mass hydrogen peroxide solution?
If 3.00 g of limestone reacted, what mass of calcium chloride would be produced?A) Calcium chloride B) Carbon dioxide C) water
There are several ways to model a compound. One type of model is shown. A central C attached to 3 C's by 1 line each, each of the 3 C's being attached to 3 H's by a 1 line each. The central C is also attached by 1 line to a C, which is attached to 2 H's and a C by a single line each. The C is attached by 2 lines to an O ad by 1 line to another O. The O with 1 line is attached by 1 line to an H. What is the chemical formula for the molecule modeled? CHO C4H11O2 C6H12O2 C6H9O
What is the formula of the ion formed when potassium achieves noble-gas electron configuration
Answers
Answer:2.50 moles of magnesium will consume approximately 182.30 grams of hydrochloric acid in the given reaction.
Explanation:To find out how many grams of hydrochloric acid (HCl) are consumed when 2.50 moles of magnesium (Mg) react with it, you can use stoichiometry and the balanced chemical equation:
Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)
From the balanced equation, you can see that 1 mole of magnesium (Mg) reacts with 2 moles of hydrochloric acid (HCl).
Now, let's use this information to calculate the moles of HCl required to react with 2.50 moles of Mg:
Moles of HCl = (2.50 moles Mg) * (2 moles HCl / 1 mole Mg)
Moles of HCl = 2.50 moles * 2
Moles of HCl = 5.00 moles
Now that we know we need 5.00 moles of HCl, we can calculate the grams of HCl needed using the molar mass of HCl:
The molar mass of HCl is the sum of the atomic masses of hydrogen (H) and chlorine (Cl):
Molar mass of HCl = 1.01 g/mol (for hydrogen) + 35.45 g/mol (for chlorine)
Molar mass of HCl = 36.46 g/mol
Now, calculate the grams of HCl:
Grams of HCl = (5.00 moles) * (36.46 g/mol)
Grams of HCl = 182.30 grams
So, 2.50 moles of magnesium will consume approximately 182.30 grams of hydrochloric acid in the given reaction.
Answers
hope this helps!
Answers
The statement is not entirely accurate. The sum of potential energy and kinetic energy does not directly equate to thermal energy. Therefore this statement is False.
Thermal energy refers to the total internal energy of a system due to the random motion of its particles, which includes both kinetic energy and potential energy related to the interactions between particles.
While kinetic energy is associated with the movement of particles, potential energy accounts for forces between particles or their positions in a field (like gravitational potential energy).
The direct summation of kinetic and potential energy does not give the complete picture of thermal energy, as it does not consider other factors like molecular interactions, vibrations, and rotations within a substance.
Thermal energy encompasses all forms of energy within a system arising from particle motion and interactions, making the given statement false.
Know more about gravitational potential:
#SPJ3
Answer:
False.
Explanation:
The sum of potential energy and the kinetic energy of an object is mechanical energy.
Hope that this helps!!! :)
Answers
72.7% is the percent by mass of oxygen in carbon dioxide. A percent is obtained by multiplying the result by 100.
One approach to show the concentration for an element within a compound or component in a combination is as a mass percentage. The mass percentage is computed by dividing the total weight of the combination by the mass of each component and multiplying the result by 100%. The mass percent is calculated by dividing the mass that contains the compound and solute by the mass for the element or solute.
Molar mass of oxygen = 32 g/mole
Molar mass of carbon dioxide = 44 g/mole
mass percentage of oxygen =(molar mass of oxygen/molar mass of carbon dioxide)× 100
=(32/44)× 100
=72.7%
To know more about mass percentage, here:
#SPJ6
Answer : The percent by mass of oxygen in carbon dioxide is, 72.72%
Solution : Given,
Molar mass of oxygen = 16 g/mole
Molar mass of carbon dioxide = 44 g/mole
As we know that there are 2 atoms of oxygen and 1 atom of carbon present in the carbon dioxide.
So, the molar mass of oxygen, = 2 × 16 = 32 g/mole
Now we have to calculate the percent by mass of oxygen in carbon dioxide.
Now put all the given values in this expression, we get
Therefore, the percent by mass of oxygen in carbon dioxide is, 72.72%
Answers
68.5 L ( 1 mol O2 / 22.4 L O2 ) = 3.06 mol O2
Explanation:
It is known that at STP, there are 22.4 L present in one mole of a substance.
Therefore, in 68.5 liters there will be 1 mol divided by 22.4 L times 68.5 L.
Mathematically,
= 3.05 mol
Hence, we can conclude that there are 3.05 moles present in 68.5 liters of oxygen gas at STP.
Answers
H has 1 proton
He has 2 protons
Li has 3 protons
Be has 4 protons and so on
Each proton has a charge of +1. The other particle present in the nucleus - the neutron - has zero electrical charge and thus irrelevant when computing the charge of a nucleus. It is easy to deduce that the nucleus charge equals the number of protons (which in turn equals the atomic number). So the nucleus charges are:
for H it's+1
for He it's +2
for Li it's +3
for Be it's +4 and so on
Atom is an electroneutral particle by definition. It means it's summed charge must be 0. Since we've looked at everything within the nucleus (the protons and the neutrons) it's time we turn our gaze to the space around it, which is full of orbiting electrons. Each electron has a charge of -1. To make up for the positive charge in the nucleus you have to fill the space aroung the nucleus with negative electrons.Thanks to the elementary nature of both proton and electron charge, you simply have to take the same number of electrons as that of protons! Like this:
H has 1 proton and 1 electron
He has 2 protons and 2 electrons
Li has 3 protons and 3 electrons
Be has 4 protons and 4 electrons and so on
Fe has atomic number 26. It means that Fe has 26 protons and 26 electrons. If it's a neutral atom
You typed 3. Is it accidental? If so, then the answer is above. If not, then you could be trying to type 56Fe +3, which means an ionic iron with charge +3. Charges are formed when you have too many or too few electrons to counter-balance the prositive charge of the nucleus. Charge +3 means you're 3 electrons short to negate the nucleus positive charge.
In other words, Fe+3 has 26 protons and 23 electrons.
Final answer:
56Fe3+ is an iron ion with a charge of +3, meaning it has 23 electrons after 3 electrons are lost from the uncharged state. It loses the 4s2 electrons first, then one of the 3d electrons.
Explanation:
The student's question refers to 56Fe3+. 56Fe3+ is an iron ion with a charge of +3, which means it has lost three electrons. Understanding the Electron configuration is vital here. Normally, iron (Fe) has 26 electrons as its atomic number is 26. Each electron has a negative charge. But in 56Fe3+, 3 electrons are lost; hence, it will have 23 electrons.
Let's look further into this. The electron configuration of an uncharged Fe atom is 1s²2s²2p6 3s²3p6 4s²3d6. The iron atom loses the 4s2 electrons first (becoming Fe2+), then one of the 3d electrons (becoming Fe3+ or 56Fe3+ as indicated in the question).
Learn more about Electrons in Iron Ion here:
#SPJ2