Answer:
5 moles of oxygen are required.
Explanation:
Given data:
Moles of O₂ required = ?
Moles of H₂ present = 10 mol
Solution:
Chemical equation:
O₂ + 2H₂ → 2H₂O
Now we will compare the moles of oxygen and hydrogen.
H₂ : O₂
2 : 1
10 : 1/2×10 = 5 mol
5 moles of oxygen are required.
9. A helium-filled balloon has a volume of 50.0 L at 25°C and 820.8mmHg atm. What pressure will it have
when the volume is sixty liters at 10.0°C?
Answer:
b
Explanation:
Can anyone help me explain what makes up an atom please
Answer:
Atoms consist of nucleus made by protons and neutrons orbited by electrons.
Explanation:
In the center of any atom you have a nucleus which is made of positively charged protons and neutrons (no charge). Surrounding the nucleus are electrons which have negative charge. The mass of an electron is much much smaller compared to a proton, and the number of protons determine the element (eg: 8 protons means we have the element Oxygen.
Which of the following is a characteristic of a weak acid?
O A. It is not as dangerous as a strong acid.
O B. It is less concentrated than a strong acid.
O c. It does not dissociate completely in water.
O D. It does not conduct electricity in water.
Acids are capable of donating the proton ion in the solution. The weak acid is incapable of dissociating completely in the aqueous solution. Thus, option C is correct.
What are weak acids?Weak acids are the category of acids that like acids can donate hydrogen or the proton ion to other substances in the solution. Though they differ in the acidic strength which makes them incapable of dissociating their ions fully.
The weak acids cannot completely ionize themselves in water and hence shows less acidic strength than the stronger acids. They have pH between 5-7 and are incapable of dissociating completely. Acetic acid, citric acid, lactic acid, etc, are weak acids.
Therefore, option C. the weak acids do not dissociate completely in water is correct.
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James was standing on a boat in deep ocean water. He wanted to see how long it would take a tennis ball to reach the shore if he threw one in from the boat. Why wouldn't this plan work?
Answer:
only the wave energy of the water moves
Explanation:
The plan will not work due to the fact that only the wave energy of the water moves and not the water itself.
The wave motion of water does not displace the water. It is only able to transfer energy from one point to another within the medium. Hence, the ball will hardly be displaced because the water itself does not move. However, it can get to the shore with the assistance of the water current.
What happens to energy in an open system?
OA. Energy can enter but not exit an open system.
OB. Energy can enter or exit an open system.
OC. Energy can exit but not enter an open system.
OD. Energy cannot enter or exit an open system.
Answer:
B
Explanation:
An open system can exchange both energy and matter with its surroundings!
What is the difference between speed and velocity?
(a) magnitude
(b) direction
(c) nothing
Answer:
(B) direction
Explanation: Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
Describe the movement of atoms in a liquid during a temperature change (both an increase and a decrease in temperature).
Answer:
Decrease: The particles will form a solid if temperature keeps on decreasing since the atoms become more and more still.
Increase: The particles will start to move more rapidly causing the liquid to form into a gas.
Please mark brainliest I hope I helped :)
Between which of these pairs of elements is a covalent bond most likely to form?
Carbon and fluorine
magnisium and oxygen
sodium and chlorine --im leaning towards this one
potassium and calcium
Answer:
The correct option here is the first option
Explanation:
Covalent bond is the bond that involves the sharing of electrons between the participating atoms. The electrons (in the outermost shells of the atoms) that are involved this sharing are called the "shared pair" while those electrons (in the outermost shells of the atoms) that are not involved in this sharing are called the "lone pair". Bonding eventually leads to each of the participating atoms achieving it's octet configuration.
Carbon will bind covalently with fluorine (to form carbon tetrafluoride) with each of the electrons on the outermost shell of the carbon been shared covalently with fluorine atoms (that also requires just one electron to achieve it's octet configuration). Thus, at the end, we would have one carbon atom being covalently linked to four flourine atoms.
PLZ HELP
Which statement best describes monsoons? there is only one choice
They force cool, moist air from oceans to rise.
They are winds that blow in the opposite direction of a normal wind.
They bring heavy rain in the winter and in the summer.
They influence precipitation as wind moves near a mountan
Answer:
D
Explanation:
How frequently does this natural hazard occur?
Which image represents the step in mitosis when chromosomes condense and spindle fibers form?
Answer:
The answer is A
Explanation:
I did the unit test review
Use the periodic table to choose the correct name for each of the following substances. Check all tha
apply
PC13
phosphorus trichloride
trichlorophosphide
trichlorine phosphide
Answer:
phosphorus trichloride
true or false Rutherford's nuclear atomic model explains why electrons fall into and collide with the nucleus
Answer:
false
Explanation:
False.
According to Rutherford's theory, an atom's nucleus is surrounded by electrons that are negatively charged. He also asserted that the electrons that surround the nucleus travel in a circular pattern at extremely high speeds. He gave these elliptical routes the name orbits.
Various nuclear atomic model types:Atomic Model by Dalton.
Atomic model by J.J. Thomson.
The atomic model of Rutherford.
Principle of Neil Bohr.
Various Atomic Models FAQs.
Examples of this group include the compound-nucleus model (qq. v.) and the liquid-drop model. Other nuclear models combine elements from the two groups, such as the collective model (q.v. ), which combines the liquid-drop mode and the shell model.
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can someone help me with this??
Answer:
A.
Explanation:
this form is used to seperate and test fibers which would be A
Hi does anyone know?
Periodic table related question
Answer:
noble gases are in fact F
When copper is combined with another element, ______, it makes bronze, the first man made metal alloy.
Answer:
tin
Explanation:
When copper is combined with another element, tin, it makes bronze, the first man made metal alloy
Will give branliest Are the answers i put in this table correct
The ones in yellow are the ones I'm most confused about
(NH₄)₂S
(NH₄)₃P
(NH₄)₃N
CuS
Cu₃P₂
Cu₃N₂
Further explanation:For ionic compounds consisting of cations (ions +) and anions (ions -)
The naming is preceded by the cation then the anion with the -ide suffix added
Generally for this ion compound consists of metal elements as cations and non-metals as anions
Metal: cation, positively charged.
Nonmetal: negative anion.
The anion cation's charge is crossed
Cation : NH₄⁺, Anion : S²⁻⇒ Compound : (NH₄)₂S
Cation : NH₄⁺, Anion : P³⁻⇒ Compound : (NH₄)₃P
Cation : NH₄⁺, Anion : N³⁻⇒ Compound : (NH₄)₃N
Cation : Cu²⁺, Anion : S²⁻⇒ Compound : CuS
Cation : Cu²⁺, Anion : P³⁻⇒ Compound : Cu₃P₂
Cation : Cu²⁺, Anion : N³⁻⇒ Compound : Cu₃N₂
convert the following 5cm into metre
Answer:
0.05 m
Explanation:
100 cm equals 1 meter
so 5/100
Answer:
0.05 m
Explanation:
= 5÷ 100 (100cm = 1m)
= 0.05m
How many significant digits does 4530.0234 have
Answer:
8
Explanation:
The reason these zeros are considered is because it shows the accuracy to which the value has been taken.
-Hope this helped
What is definition of earth science. Without copy right out of the internet
Answer:
the science relating to all stuff about earth
Blank of substances depend on bond type.
Answer:
lonic bond i think
Explanation:
How many Iron atoms are found in 25g of Iron(III)Oxide?
Answer:
dont know how many
Explanation:.
Two atoms with an electronegativity difference of 0.4 form a bond that is_____
a) ionic, because electrons are transferred
b) covalent, because electrons are shared
c) ionic, because electrons are shared
d) covalent, because electrons are transferred
Answer:
B) Covalent, because electrons are shared.
Two atoms with an electronegativity difference of 0.4 form a bond that is covalent bond because electrons are shared.
What is a covalent bond?Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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potassium has a 1+ charge and oxygen has a 2- charge a lewis dot diagram should contain 2 potassium atoms and 1 oxygen atom to show how these atoms form an ionic bond
true
false
Which image shows a cumulonimbus cloud
1
2
3
4
Answer:
2
Explanation:
Answer:
2
Explanation:
i took the test on edg 2022 good luck on you test :)
How many grams of carbon would be present in carbon monoxide that contains 2.6 grams of oxygen?
Answer:
1.95g
Explanation:
Find mass in CO
Find C mass
Quarantine is sometimes used to prevent the spread of an infectious
disease. A trade-off associated with quarantine is that: *
people who are quarantined lose their freedom
the disease is less likely to be spread to other people
both a and b
none of the above
Answer:
both a and b
Explanation:
At which position does the ball have the most
potential energy?
At which position does the ball have the most kinetic
energy?
At which position does the ball have about equal
amounts of potential and kinetic energy?
The weight of an object and its mass are always the same.
True
False
Answer:
While the weight of an object varies in proportion to the strength of the gravitational field, its mass is constant, as long as no energy or matter is added to the object. Therefore, false.
Explanation:
Answer:
The correct answer should be false
Explanation:
can someone with this? I need someone to do the "THINK" or at least tell me what it's asking for. I Already did the questions in black. this book is from Abeka. 9th-grade science and matter.
Answer:
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