Answer: Hydrogen that is not used in balloons because hydrogen burns very easily.
pls mark brainliest
How many atoms are in 1.5 moles of iron?
Answer:
One mole of anything is 6.022×1023 everythings, including atoms. Multiply the moles Fe by 6.022×1023 atoms/mol. 3.77mol Fe ×6.022×1023atoms Fe1mol Fe =2.27×1024 atoms Fe rounded to three significant figures.
The number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
From the question,
We are to determine the number of atoms present in 1.5 moles of iron.
From the formula,
[tex]Number\ of\ moles = \frac{Number\ of\ atoms}{Avogadro's\ constant}[/tex]
Then, we can write that
Number of atoms = Number of moles × Avogadro's constant
∴ Number of atoms of iron present = 1.5 × 6.022×10²³
Number of atoms of iron present = 9.033 ×10²³ atoms
Number of atoms of iron present ≅ 9.0 ×10²³ atoms
Hence, the number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
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When you lie down on a mattress the force of ______ pulls your mass towards the floor, while the force of the mattress pushes back up resulting in _______ forces, which allow you to sleep comfortably.
Answer:
1 gravity 2 counteractive
Explanation:
Why methanol is not an alkane
Answer: it’s not in the first group in the periodic table
Explanation:
if you have 3g of sodium and 4g of chlorine what is the total mass of sodium chloride
Answer:
7g
Explanation:
Given parameters:
Mass of sodium = 3g
Mass of chlorine = 4g
Unknown:
Total mass of sodium chloride = ?
Solution:
This problem entails the direct application of the law of conservation of mass. According to this law, it states that "matter is neither created nor destroyed in the course of a chemical reaction".
So, when sodium and chlorine combines to form sodium chloride, to are expect to produce substance with a mass which adds up to the sum of the reactants;
Mass of sodium chloride = mass of sodium + mass of chlorine
= 3g + 4g
= 7g
9) A certain atom has 10 electrons, 14 neutrons, and 11 protons. Write the name of this element in isotope notation.
Answer:
²⁵₁₁Na⁺
Explanation:
Details about the atom:
Number of electrons = 10 electrons
Number of neutrons = 14 neutrons
Number of protons = 11 protons
The atomic number of an atom is a good indicator of the type of atom we have been given.
From the subatomic particles, the number of protons is the same as the atomic number.
Since the number of protons is 11, its atomic number will be 11.
The element with atomic number 11 is sodium, Na.
To write a complete notation, we also need the mass number;
Mass number = number of protons + number of neutrons
Mass number = 11 + 14 = 25
The charge on the atom:
Charge = Number of protons - number of electrons = 11 - 10 = 1+
The element in isotopic notation is given as;
²⁵₁₁Na⁺
What causes potential energy to convert to kinetic energy?
Answer:
The system's potential energy is increased by gaining altitude. Then, gravity takes over, causing most of the potential energy to be converted into kinetic energy
Explanation:
Bromine gas reacts with beryllium fluoride →
Answer:
Br₂ + BeF₂ → BeBr₂ + F₂
Bromine gas reacts with beryllium fluoride to produce beryllium bromide and fluorine gas.
Explanation:
This is a single replacement reaction in which bromine replaces fluorine.
Hope that helps.
How would you name the number:100 liters?
A. Dekaliter
B. Hectoliter
C. Centiliter
D. Megaliter
E. Other
Answer:
E
Explanation:
Plz help
I don't know chem that well
Because sound is energy created by vibrations, through which medium will it move the fastest?
A) gas
B) liquid
C) solid
D) vacuum
Answer:
C - solid
Explanation:
Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.
Answer:
c solid
Explanation:
Why is the movement of water between land, oceans and living things
important?
What are columns on the periodic table called? What is the significance of the columns on the periodic table?
Answer:
The vertical columns of the periodic table are called groups, or families. The significance is elements with similar properties are placed in the same vertical columns. The horizontal rows of the periodic table are called periods. The significance is that properties vary from left to right along the rows.
Explanation:
We just did this in science
Answer:
columns in the periodic table are reffered to as "periods". periods represent elements with the same number of shells i.e all elements in period 1 have 1 shell (k shell) and vice versa.
A log has a density of .8 g/cm³. What will happen to this log in freshwater, which has a density of 1.0 g/cm³?
It will sink.
It will float.
It will move deeper.
It will decrease in density.
Answer:
The log will float on the water because its density is lower than the liquid, so it will stay at the top due to Archimedes' principle.
Answer:
B: It will float.
Explanation:
on edge2021! hope this helps!!~ (=^▽^=)
Rank the three types of bonds - ionic, polar covalent and nonpolar covalent - from
strongest to weakest. Justify your answer.
The order of strongest to weakest bond type:
Ionic bond > Polar covalent bond > non polar covalent bond
Explanation:
Ionic bonds are chemicals bonds in which the complete transfer of electrons takes place between a highly electronegative atom and the least electronegative atom.In an ionic bond, there is a strong electrostatic force of attraction due to the formation of two oppositely charged ions.Covalent bonds are chemicals bonds in which the sharing of electrons takes place between atoms with a slight or nil difference in their electronegativities.There are two types of covalent bonds: polar covalent and nonpolar covalent.In polar covalent bonds, due to unequal sharing of electrons partial positive and negative charges are generated.These partial charges give rise to a temporary attractive force of attraction between atoms in polar covalent bonds.In non-polar covalent bonds, equal sharing of electrons between atoms of the same or similar electronegativities.The order from strongest to weakest chemical bond:Strong electrostatic force> temporary attractive force> no force of attraction
Ionic bond > Polar covalent bond > non polar covalent bond
So, from this, we can conclude that the order of ionic bond is the strongest followed by a polar covalent bond and then a nonpolar covalent bond.
Learn more about types of chemical bonds here:
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How do chemists use systems and order in their work?
Answer:
5 point) Chemists used systems and order because they study the basic unit of all forms of matter, which is the atom . However, there are several different kinds of atoms, called elements . Chemists organize these elements using the periodic table .
Explanation:
plzzz helppp!!!
How long would it take you to travel 8 miles at a speed of 1 mile per hour?
Answer:
It would take you 8 hours.
Explanation:
This would take you 8 hours because you are going 1 mile an hour. So in 1 hour, you would have gone 1 mile.
The sun provides heat
Using the periodic table, choose the more reactive non-metal.
S or As
The most reactive non metal is called Astantine(As)
After a lightning storm, the Rodriguez family notices the TV no longer works.
What probably caused this malfunction?
A. Power from the TV was pulled into the ground by the lightning.
B. A power surge burned an electric component of the TV.
C. The lightning sucked power from the TV.
D. The surge protector sucked power from the TV.
Answer:
B
Explanation:
A P E X
After a lightning storm, the Rodriguez family notices the TV is no longer working because a power surge burned an electric component of the TV. The correct option is B.
What is lightning?Lightning is a natural phenomenon that occurs when there is a collision of negative and positive charged particles. It appears as light or spark of electricity into the earth. It shines and affects the eyes if directly seen.
Lightning occurs when there is thunder or rain, lightning causes destruction to the earth, the houses, trees, and people are also impacted by this. The TV was not working because there was a short circuit due to lightning.
Thus, the correct option is B. A power surge burned an electric component of the TV during a lightning storm.
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3 C₂ H₂
How many CzHg molecules are in the picture?
Answer:
i think it will 3 of each hope it helps. three molecules of each
TEST QUESTION PLS HELP What are isotopes? Write isotopes of three different elements, showing their atomic number and mass number. (I'll give brainliest)
Answer:
Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element's atomic number on the Periodic Table
Explanation:
Hope this helps some? :)
Need help!!!
Will give brainliest for answer
Give oxidation and reduction half-reactions to the equation provided
Explanation:
here u go kid , welcome kid :)
How many atoms of aluminum (Al) are in 2.34 mol of aluminum?
Answer: " [tex]1.41 * 10^{24}[/tex] " atoms of aluminum (Al) .
____________________________________
Explanation:
_________________________
Using a technique called "dimensional analysis" ; as follows:
________________________
→ " [tex]\frac{2.34 mol Al}{1} * \frac{6.022*10^{23}atoms Al}{1 mol Al} = ?[/tex]
________________________
The units "mol Al" ["moles of aluminum"] cancel out; and we have:
________________________
→ "[tex][(2.34) * (6.022 * 10^{23})] = ?[/tex] atoms of Al [aluminum].
________________________
Note that by definition: 1 (one) "mole" (abbreviated "mol") of anything consists of " [tex]6.022*10^{23}[/tex] " units " of that particular thing.
This number: 6.022*10^{23} —is known as: "Avogadro's number".
________________________
→ [ 2.34 * 6.022 * 10^23] ;
= 1.409148 * 10^24 ;
→ Round to 3 (Three) significant figures;
→ since: "2.34" has 3 (Three) significant figures;
→ to get: " [tex]1.41 *10^{24}[/tex] atoms of aluminum (Al).
________________________
Hope this is helpful to you! Wishing you the best!
________________________
Guys please I need an answer for this asap
Mg+2HCl -> MgCl+H2
0.2 mole of mg reacted with 0.2 of HCl
What is the mass of hydrogen gas produced?
A gas has a pressure of 0.12 atm at 294 K. What is the new pressure at 273 K?
Answer:
P₂ = 0.11 atm
Explanation:
Given data:
Initial pressure = 0.12 atm
Initial temperature = 294 K
Final pressure = ?
Final temperature = 273 K
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
0.12 atm / 294 K = P₂/273 K
P₂ = 0.12 atm × 273 K / 294 K
P₂ = 32.76 atm. K /294 K
P₂ = 0.11 atm
Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?
a
о
Нc— c— СТ.
Oь
o=
H— С—Н
нан
H— C— N
н н
н
0
1
— С—С
1
н н
Answer:
Explanation:
hc-- c--ct
The correct answer is option A: CH3COCH3
Hydrogen bonding occurs when hydrogen is directly bonded to a highly electronegative atom.
Hydrogen bonding is one of the intermolecular interactions. It occurs only when hydrogen is bonded to a very electronegative atom in a molecule. Hydrogen bonding can occur between two molecules of the same type(intermolecular hydrogen bonding) or within the same molecule (intra molecular hydrogen bonding). In either case, the bonding is polar as hydrogen is attached to the electronegative atom via a non-covalent bonding interaction.
Looking at the structures in the question attached, CH3COCH3 does not have any hydrogen atom directly attached to a highly electronegative atom hence CH3COCH3 does not exhibit hydrogen bonding.
Hydrogen bonding in water is shown in the image attached.
For more about hydrogen bonds, see
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.
A hot plate, a large beaker of water, and grains of rice are used in a class demonstration. When the water begins to boil, the rice moves in a circular pattern. The model demonstrates
Answer:
Conduction
Explanation:
Carbon is the most common element in the human body.
True
False
state the reason
How many atoms of nitrogen are in 0.400 moles of N205?
Answer:
Answer. 0.400 mol N2O5 contains 2.41 molecules of N2O5
Explanation:
Convert 12.0 g of FeO into moles.
1 mole
71.85 moles
5.99 moles
O.17 moles
Answer:
71.85 moles
5.99 moles
O.17 moles
Explanation:
vzl
Answer:
4th option: 0.17 moles
Explanation:
The number of moles of a substance can be calculated using the following formula: Mole= Mass ÷Mr
The Mr of a compound is its molecular weight, which is the sum of the relative atomic masses of the atoms it is made up of.
Find the Mr using the periodic table:
Mr of FeO
= 55.8 +16
= 71.8
Calculate number of moles:
Amount of FeO
= 12 ÷71.8
= 0.17 moles (2 d.p.)
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