Answer:
Aluminium fluoride is an ionic compound and the formation of the compound involves ionic bonding between positively-charged aluminium ions and negatively-charged fluoride ions.
Explanation:
Aluminium fluoride is an ionic compound and the formation of the compound involves ionic bonding between positively-charged aluminium ions and negatively-charged fluoride ions.
Ionic bonds are formed between two oppositely charged ions which are held together by strong electrostatic forces of attraction.
In the formation of aluminium fluoride, aluminium being a metal gives up its electrons to form the aluminium ion. Aluminium has three valence electrons which it gives up to the aluminium ion, Al³+. Fluorine, being a non-metal forms ions by accepting electrons to form the fluoride ion, F-. Fluorine has a valency of 1, hence, each fluorine atom can only accept one electron to form fluoride ions. Therefore, three fluorine atoms are required to accept the three electrons from an aluminium atoms.
With the formation of the aluminium and fluoride ions, the ions are then held together in the compound by the strong electrostatic forces of attrcation between the charges on the ions. Thus, the compound aluminium fluoride is formed.
In a plant, 1500kg of nitrogen oxide is consumed per day to produce 1,500 kg of nitrogen per day. What is the prevent yield?
Answer:
65.21 percent
Explanation:
We are to find the percentage yield
We have this equation,
2no+o2 -->2no2
Such that 1500 kilograms/30grams
= Mno2/46
=1500/30 = mno2/46
We cross multiply from here
1500x46 = 30xMnO2
69000 = 30Mno2
69000/30 = MnO2
2300 = Mno2
The percentage yield would be
1500/2300 *100
= 0.6521 x 100
= 65.21%
This answers the question
Hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen gas (O2). Hydrogen peroxide is a liquid that is stored in dark-colored bottles in a cool location. Which of these is the MOST likely reason for storing hydrogen peroxide in
this way?
A. Hydrogen peroxide forms crystals when warmed.
B. Exposure to light allows bacteria to grow in hydrogen peroxide.
C. Exposure to light promotes the formation of hydrogen gas (H2) instead of oxygen gas.
D. Hydrogen peroxide breaks down quickly when exposed to light.
Answer:
D
Explanation:
the H2O2 under go reduction to remove O2 and then forms water
Hospital patients are administered oxygen from an pressurized
hyperbaric oxygen chamber. 600.0 L of oxygen is compressed in a
cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at a
pressure of 3.0 atm?
Answer:
32000atm
Explanation:
Using Boyle's law equation;
P1V1 = P2V2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (
V2 = final volume (L)
According to the question below:
P1 = 160.0 atm
P2 = 3.0 atm
V1 = 600L
V2 = ?
Using P1V1 = P2V2
160 × 600 = 3 × V2
96000 = 3V2
V2 = 96000/3
V2 = 32000atm
what do the letters in the boxes of the periodic table represent
Answer:
The letters are a one- or two-letter symbol assigned to each element.
Explanation:
What is pOH? ?
A. pOH = Iog[ΟΗ]
Ο Ο Ο
Β. pH = Iog[Η]
Ο C. pH = Iog[ΟΗ]
D. pOH = [Η
(OH)
A phase change is an example of a
.Physical Property
.Chemical Property
.Physical Change
.Chemical Change
Answer:
Physical property
Explanation:
There are two types of properties that can occur in a reaction viz: physical nd chemical. Physical property are those ones have do not change the chemical identity of the substance involved as opposed to chemical properties in which the chemical composition of the substances are changed.
Physical properties include signs such as change of phase i.e. solid to gas, melting and boiling points, colour etc.
what is a chemical bond ??
HELP WITH FINAL CHEM
Answer:
idvd has a very high performance and a lot more than just the right side to get it all out
Drag the tiles to the correct boxes to complete the pairs.
Match each mineral with its main function in the body.
Answer:
Hello calcium maintains healthy bones and muscles. Zinc is for immune function. Iron carrier oxygen to blood. Sodium maintains fluid balance in the body.
Answer: Zinc : plays a role in immune system function
Iron: carries oxygen to all body tissues
Calcium: Maintains healthy bones and muscles
Sodium: maintains fluid balance in the body
Explanation: Got it right on PLATO/edmentum
Is this right if not pls lmk what the correct answer is:)
Answer:
Helps to form hair, nails and your skin outer layer
Help to support your skin, heal wounds and keep your nails and hair healthy
Explanation:
if it's helpful let me know in the comments and messages .. please send me your phone number ..lets us be friends
What is the mass of 3.01 x10^23 molecules of ammonia?
For each of the following sets of elements, state whether all of the elements are in the same group, the same period, or neither the same group or the same period.
a. Fe, Ru, Os
b. Rh, Pd, Ag
c. Sn, As, S
d. Se, Te, Po
Answer:
a. Same group, different period
b. Different group, same period
c. Different group, different period
d. Same group, different period
If the half-life of Sulfate-12 is 18 years, how much of a 6 gram sample is left after 2 half-lives?
Answer:
The correct answer is - 1/4 0f 6 gram or 1.5 gram to be exact.
Explanation:
Given:
Half-life of sulfate-12 = 18 years
number of half-lives - 2
initial amount - 6 grams.
Solution:
The Half-life of an element or substance is the required time to decay the half amount of the initial amount of the element.
Remaining amount = initial amount * (1/2)^n
here n = number of half lives
then,
Remaining amount = 6* (1/2)^2
= 6/4
= 1.5 g.
Thus, the correct answer is = 1.5 g or 1/4 of 6 gram.
2. Heat changes during changes of state
A. Boiling water (2.5 pts)
Water boils at 100 °C. You boil a pot containing 500 g of water for 10 minutes.
What is the temperature of the water after 10 minutes of constant boiling? (hint this question
does not require any math).
Explain or justify your answer by discussing heat and state change.
B (2.5 pts) Boiling off a pot of water
A pot containing 500 g of water is brought to a boil. The later heat of vaporization is for water H=2260 kJ/kg
How much heat will it take to completely boil the water (turn it all to steam) of water is brought to a boil.
Answer: A) it remains at a 100 B) 1130J
Explanation:
A) Water boils at a hundred after which further heat is used up to break bonds in order to allow water to boil rather than being used up to increase the temperature of the water that is boiling.
B) Energy/heat = specific latent heat x mass
E = 2260 x 0.5 (kg)
E = 1130 J
I need help with both of the questions fast plz!!!
Answer: SMALLEST is lithium
LARGEST is Fluorine
Explanation:
Q4. A grasshopper jumps at an angle of
30° to the horizontal with a take off
speed of 3m/s
1.
What is the height of its jump? (2)
II.
How long is it above the ground?
(2)
III.
What is the range of its jump? (2)
Answer:
i. The height of its jump is approximately 0.115 m
ii. The time of flight of its jump is approximately 0.306 seconds
iii. The range of its jump is approximately 0.795 m
Explanation:
The angle at which the grasshopper jumps, θ = 30°
The speed with which the grasshopper takes off, u = 3 m/s
i. The height of its jump 'h', is given by the following relation;
[tex]h = \dfrac{u^2 \times sin^2 \theta}{2 \times g}[/tex]
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
Therefore;
[tex]h \approx \dfrac{3^2 \times sin^2 (30^{\circ})}{2 \times 9.81} = \dfrac{25}{218} \approx 0.115[/tex]
The height of its jump, h ≈ 0.115 m
ii. The time of flight of its jump, 't', is given as follows;
[tex]The \ time \ of \ flight, \, t = \dfrac{2 \times u \times sin \theta}{ g}[/tex]
Therefore;
[tex]t \approx \dfrac{2 \times 3 \times sin (30 ^ {\circ})}{ 9.81} = \dfrac{100}{327} \approx 0.306[/tex]
The time of flight of its jump, t ≈ 0.306 seconds
iii. The range of the jump is given by the following projectile motion equation for the range as follows;
[tex]R = \dfrac{u^2 \times sin (2 \times \theta)}{ g}[/tex]
Therefore;
[tex]R \approx \dfrac{3^2 \times sin (2 \times 30^ {\circ})}{ 9.81} = \dfrac{41659} {52433} \approx 0.795[/tex]
The range of the jump, R ≈ 0.795 m.
While watching a popular space-based science fiction movie, space
vehicles loudly shoot each other with lasers and explode with a booming
sound. Students of science know that sound does not travel through
space and these movie scenes showing space sounds are factually
incorrect. Why are there no sounds in space?
Answer:
Sound waves required a medium.
Explanation:
In space, there is only vacuum hence no any medium for sound wave travel.
Since sound waves are mechanical waves, they require a material medium such as air, hence no sound transmission.
Answer: There is no air.
Explanation:
Because there is no air in space, there is no way for air to travel in space.
Air needs to push on your eardrums or air in general to move through space when there is no air your eardrums won’t move from the air making it quiet.
Can someone help me please
Answer:
health issues and physical encounters
Which of these correctly labels the parts of a bone from outside to inside?
A
compact bone, marrow, periosteum, spongy bone
B
marrow, spongy bone, compact bone, periosteum
C
spongy bone, periosteum, compact bone, marrow
D
periosteum, compact bone, spongy bone, marrow
The correct answer is option (a) compact bone, marrow, periosteum, spongy bone.
What is bone and what are the parts of the bone?
Bone is living tissue that makes up the body's skeleton. There are 3 types of bone tissue, including the following: Compact tissue. The harder, outer tissue of bones. Cancellous tissue. The sponge-like tissue inside bones. Subchondral tissue. The smooth tissue at the ends of bones, which is covered with another type of tissue called cartilage.
Why other options are incorrect?
Options (b), (c), (d), are incorrect because the correct order from outside to inside isCompact bone, marrow, periosteum, spongy bone.Learn more about bone below,
https://brainly.com/question/11401217
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number of moles of sodium azide
Answer:
0.015382279644614 mole.
Answer:
yes this is the answer for that quaz
a. For the reaction 2H2 + 02→ 2H20, how many moles of water can be produced from 6.0 mol of oxygen? 2.0 mol b. 6.0 mol 12 mol d. 18 mol
Explanation:
from the equation 1 mole of O2 will give 2 moles of H2O then 6.0 moles of O2 will give x
6.0*2 moles/ 1 mole
= 12 moles
this implies that, 6.0 moles of O2 will give = 12 moles of water
How is wind speed indicated? What is the unit used to define wind speed?
Answer:
AnemometerknotExplanation:
Instrument used to measure wind speed are known as anemometer and can record wind speed, direction, and strength. The normal unit of wind speed is knots (nautical miles per hour)
Which of these takes place when a chemical change occurs?
A. Bonds connecting atoms in products and reactants form.
B. Bonds connecting atoms in products and reactants break.
C. Bonds connecting atoms in reactants break, and bonds connecting atoms in products form.
D. Bonds connecting atoms in reactants form, and bonds connecting atoms in products break.
Answer:
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.
Explanation:
Write a neutralization reaction to form the salt k2so4
H2SO4 + 2KCL ----------› K2SO4 + 2HCL
hope it helps you ♡♡
an atom has 19 protons and 20 neutrons. what is the atomic number with steps
Answer:
39
Explanation:
add em up
a chemist dissolves 0.564 moles of manganese (IV) oxide (MnO2) in water, and adds enough water to make 0.510 L of solution. Calculate the molarity of the solution.
Answer:
The molarity of the solution is 1.1 [tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity is a measure of the concentration of that substance that is defined as the number of moles of solute divided by the volume of the solution.
The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:
[tex]molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex]
In this case
number of moles of solute= 0.564 molesvolume= 0.510 LReplacing:
[tex]molarity=\frac{0.564 moles}{0.510 L}[/tex]
Solving:
molarity= 1.1 [tex]\frac{moles}{liter}[/tex]
The molarity of the solution is 1.1 [tex]\frac{moles}{liter}[/tex]
Which is most likely a physical change?
Answer:
Examples of physical change include changes in the size or shape of matter. Changes of state—for example, from solid to liquid or from liquid to gas—are also physical changes. Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting.
Explanation:
How does the number of reactants in a decomposition reaction compare with
the number of products?
A. The number of reactants may be greater than or less than the
number of products.
B. The number of reactants is the same as the number of products.
C. The number of reactants is less than the number of products.
D. The number of reactants is greater than the number of products.
The number of reactants is less than the number of products in a decomposition reaction.
What is a Decomposition reaction?This is the type of chemical reaction which involves a reactant being broken down into two or more products.
This means the number of product is always greater than the reactant which is why option C was chosen.
Read more about Decomposition reaction here https://brainly.com/question/1465225
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Drag the tiles to the boxes to form correct pairs.
Match each chemical reaction with the type of reaction that best describes it.
Answer:
The way I just figured it out myself and made another acc to put the answer on :/
Explanation:
The temperature of a 95.4 g piece of copper decreases from 48°C to 25°C when the copper releases - 849 J of heat. What is the specific heat of copper?
