Answer:
12.8 g
Explanation:
Step 1: Write the balanced neutralization reaction
Al(OH)₃ + 3 HCl ⇒ AlCl₃ + 3 H₂O
Step 2: Calculate the moles corresponding to 17.9 g of HCl
The molar mass of HCl is 36.46 g/mol.
17.9 g × 1 mol/36.46 g = 0.491 mol
Step 3: Calculate the moles of Al(OH)₃ that completely react with 0.491 moles of HCl
The molar ratio of Al(OH)₃ to HCl is 1:3. The reacting moles of Al(OH)₃ are 1/3 × 0.491 mol = 0.164 mol
Step 4: Calculate the mass corresponding to 0.164 moles of Al(OH)₃
The molar mass of Al(OH)₃ is 78.00 g/mol.
0.164 mol × 78.00 g/mol = 12.8 g
Heptane (C7H16) is a hydrocarbon fuel used for gas barbecues. Balance the chemical equation (given below) for the reaction that occurs when heptane burns in air. What are the coefficients in the balanced equation
Answer:
a = 1, b = 11, c = 7, d = 8
Explanation:
aC7H16 + bO2 ------> cCO2 + dH2O
1 C7H16 + 11 O2 ------> 7 CO2 + 8H2O
I guess this is what you mean..if it is, don't forget to mark me brainliest
How to atoms share more than one pair of electrons?
Answer:
A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Explanation:
More than one pair of electrons can be shared between atoms to form double or triple covalent bonds. Unlike ionic bonds, covalent bonds are often formed between atoms where one of the atoms cannot easily attain a noble gas electron shell configuration through the loss or gain of one or two electrons.
What is the cathode in an electrochemical cell?
Answer: The cathode is the electrode where reduction (gain of electrons) takes place (metal-B electrode)
Answer: The electrode where reduction occurs.
ANSWER ASAP PLEASE
Ball 1 has a mass of 10 g. Ball 2 has a mass of 30 g. Which prediction tells how
gravity will act on the balls when dropped?
O
A. The pull of gravity will be greater on ball 1.
B. The pull of gravity will be greater on ball 2.
C. The pull of gravity will be the same on each ball.
O
D. The pull of gravity will not act on either ball.
Answer:
c
Explanation:
i rememer this from 3rd grade
two atoms bonded together will remain some distance apart minimizing the A. Number of valence electrons in the bond. B. Potential energy of the bond. C.partial charge of the bond D.bond distance
Answer:
Answer is the number of the c
Determine the total number of electrons in the d orbitals of an atom of tin, Sn (Z = 50).
Answer:
Explanation:
Sn (Z = 50 )
Electronic configuration = [Kr] 4d¹⁰5s²5p²
= 1s²2s²p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p²
So , total number of electrons in d orbital = 10 + 10 = 20 .
Which formula is an ionic compound?
CO2
NaF
N2
NO2
Answer:
def CO2
Explanation:
hellllpppppppp mee plzzzzzzzxzzzxzxzzzzzxx
How many liters of volume is one mole of gas at standard temperature and
pressure?
22.7 liters
The molar volume of an ideal gas depends on the temperature and pressure. One mole of any ideal gas occupies 22.7 liters at 0 0C and 1 bar (STP).
Hope this helped
what the type of solid materials are typically hard, have high melting pionts and poor electrical conductivities
Answer:
Ionic solids
Explanation: Ionic solids—Made up of positive and negative ions and held together by electrostatic attractions. They're characterized by very high melting points and brittleness and are poor conductors in the solid state. An example of an ionic solid is table salt, NaCl.
Answer:
Ionic solids
Explanation:
Is mass conserved when neutralisation takes place? That is, is the total mass of the acid and alkali equal to the total mass of
the products, salt and water?
Answer:
Yes
Explanation:
yes, this is in every chemical reaction (except nuclear reaction) and Is known as "law of conservation of mass"
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1.1
A sample of oxygen occupies 47.2 L under a pressure of 1240 torr at 25 °C. What
volume would it occupy at 25 °C if the pressure were decreased to 730 torr?
Answer:
80.2L
Explanation:
Given parameters:
Initial volume of oxygen = 47.2L
Initial pressure of oxygen = 1240torr
Final pressure = 730torr
Unknown:
Final volume = ?
Solution:
To solve this problem, we apply the Boyle's law proposed by Robert Boyle. It states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".
Mathematically;
P₁V₁ = P₂V₂
P and V are pressure and volume
1 and 2 are initial and final states
1240 x 47.2 = 730 x V₂
V₂ = 80.2L
g For a given arrangement of ions, the lattice energy increases as ionic radius ________ and as ionic charge ________.
Answer:
as the charge of the ions increases, the lattice energy increases. as the size of the ions increases, the lattice energy decreases.
For a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.
What is ion?An atom or molecule is said to be an ion if one or more of whose valence electrons have been acquired or lost, providing it a net negative or positive electrical charge.
Faraday knew that metals disintegrated together into solution place at a single electrode and that a second metal was placed first from solution at the opposite electrode, as such matter had to be trying to move underneath the impact of an electrical current even though he was unable to identify the particles trying to move between the electrodes. For a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.
Therefore, for a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.
To learn more about ion, here:
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How many milliliters of an aqueous solution of 0.227 M sodium carbonate is needed to obtain 3.55 grams of the salt?
Answer:
147.6 mL .
Explanation:
sodium carbonate , Na₂CO₃
Molecular weight = 106
3.55 gm of sodium carbonate = 3.55 / 106
= .0335 moles
Let the volume of litre required = V
V litre of .227 M solution will contain
V x .227 moles of sodium carbonate . So
V x .227 = .0335
V = .1476 L
= 147.6 mL .
WILL GIVE BRAINLIEST!
Calculate the bond for CO2
Answer:
Bonding Order = number of bonding electrons – number of antibonding electrons/2.
So for CO2, there is a total of 16 electrons, 8 of which are antibonding electrons.
So 16 – 8 = 8; divided by 2 = 4. So, 4 is the bonding order of CO2. The molecular structure of CO2 looks like this:
..~-~~..
O=C=O
..~-~~..
Before a chemical reaction, the total mass of two reactants is measured to be 40 grams.
After the reaction, what should be the total mass of the products?
A. 0 grams
B. 20 grams
C. 40 grams
D. 80 grams
The total mass of the products is 40 grams (Option C).
In 1789, Antoine Lavoisier discovered that mass is neither created nor destroyed in chemical reactions. This is now known as Lavoisier's law of conservation of mass. In other terms, the sum of the masses of the reactants is equal to the sum of the masses of the products. So, in this case, the total mass of the products must be 40 grams as well.
The total mass of the products is 40 grams.
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If there is a total of 100J of
energy in a system and 40 of energy is kinetic,
how much potential energy is there
Answer:
60j because 100-60=40j
How many electrons are gained in the half-reaction 02 + electrons → 2029
A. 2
B. 1
C. 0
D. 4
Answer:2
Explanation:
He
What is the charge of an atom that has 6 protons, 4
neutrons, and 6 electrons?
Answer:
neutral/no charge
Explanation:
How does heat energy help change shape of metals?
Metals releases heat energy to be able to be shaped.
Heat energy provides more pressure that allows metals to bend.
Heat energy allows metal to become more malleable.
Metals require a lot of heat energy to be destroyed.
Answer: 3
Explanation:
It speed up the molecules to get them to bent and move instead of staying solid
Answer:
c
Explanation:
When enough heat energy is transferred to a metal, the molecules vibrate quickly enough so that the solid metal starts to change shape.
Winds move in the same direction in both southern and northern hemispheres.
Select one:
True
False
Answer:
your answer would be false.
Explanation:
prevailing winds blow east-west rather than north-south.
What is the mass number of this atom ?
Elements of the same subgroup have the same number of electrons on the outer layer. Am i right?
Answer:
yes
Explanation:
because they have similar chemical properties
From which type of clouds do hail pellets form?
Answer:
Hail pallets forms inside of cumulonimbus clouds
Explanation:
Answer: cumulonimbus hope it helps pls stay safe
what is the molarity of an HCI solution if 25.0 ml of 0.185 M NaOH is required to neutralize 0.0200 L of HCI?
Answer:
Molarity of HCl solution = 0.25 M
Explanation:
Given data:
Volume of NaOH= V₁ = 25.0 mL (25/1000 = 0.025 L)
Molarity of NaOH solution=M₁ = 0.185 M
Volume of HCl solution = V₂ = 0.0200 L
Molarity of HCl solution = M₂= ?
Solution:
M₁V₁ = M₂V₂
0.185 M ×0.025 L = M₂ × 0.0200 L
M₂ = 0.185 M ×0.025 L / 0.0200 L
M₂ = 0.005M.L /0.0200 L
M₂ = 0.25 M
If 30.0 g of H2SO4 reacts with sodium hydroxide, what mass of water is produced?
11.02g
Explanation:
mole ratio between H2SO4 and water is 1:2
mole of H2SO4 is 0.306
then the mole of water is 0.612
finally the mole of water is multiplied by 18, the molar mass to get 11.02 g of water
Draw the Lewis structure for the ClO3- ion on paper. How many valence electrons are found in the ion
Answer:
25 valence electrons.
Explanation:
Hello!
In this case, based on the attached picture, you can see that the chlorate ion has three oxygen atoms and one chlorine ion, whereas you can see there is a coordination bond (two arrows) from chlorine to oxygen which means that oxygen receives two electrons from chlorine in order to complete its octet and to allow chlorine to not exceed the octet. It means there is another oxygen completes its octet via the Cl=O bond and the the last oxygen is negatively charged because it is missing one bond to attain its octet even thought chlorine actually completes its octet.
Therefore, this ion has seven valence electrons from chlorine and 18 valence electrons from the three oxygen atoms, which means it has 25 valence electrons overall.
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Calculate the mass percent of 0.389 g of silicon (Si) that reacts with oxygen to form 0.832 g silicon dioxide (SiO 2 )
Answer:
Mass percent of silicon = 46.75% (Approx)
Explanation:
Given:
Mass of silicon = 0.389 g
Mass of silicon dioxide = 0.832 g
Find:
Mass percent of silicon
Computation:
Mass percent of silicon = Mass of silicon / Mass of silicon dioxide
Mass percent of silicon = [0.389 g / 0.832 g]100
Mass percent of silicon = 46.75% (Approx)
Cardinals are birds that do not migrate but spend the winter in New York State. Many people feed these birds sunflower seeds during the winter months. the starches present in the sunflower seeds help the cardinals to survive. Identify the building blocks of starches
Answer:
simple sugar
Explanation:
The northern cardinal is a bird of the Cardinalis genus. It s also called as the red bird. It is mostly found in Canada, United states and parts of Texas and Mexico. The Cardinal birds do not migrate in winter and spends the winter season in New York. These birds are fed with sunflower seeds by the people during the winter season. The starches in the seeds of the sunflower helps these birds to survive in the winter. The glucose or the simple sugar found in the starches are the building blocks of the starches.
How do you know about a substance if you know its temperature
A. How heavy the substance is
B. How large or small the particles of the substance are
C. How hot or cold the substance is
D. How many particles are in the substance
Answer:
How hot or cold the substance is
Explanation:
You can do a lot with just the temperature of a substance. Chemists can use this to identify the substance because of the temperature at which it melts. They can then find out how long it took to melt, which can also help.
Answer:c how hot or cold
Explanation: