The empirical formula :
MgCl₂
Li₂O
Further explanationGiven
a 3.60 g of magnesium and 10.65 g of chlorine
b 9.1 g of lithium and 10.4 g of oxygen
Required
The empirical formula
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
a. mol ratio of Mg (Ar=24 g/mol) and Cl(Ar=35.5 g/mol)
Mg : Cl
=3.6/24 : 10.65/35.5
=0.15 : 0.3 = divide by 0.15
=1 : 2
The empirical formula : MgCl₂
b. a. mol ratio of Li (Ar=7 g/mol) and O(Ar=16 g/mol)
Li : O
=9.1/7 : 10.4/16
=1.3 : 0.65 = divide by 0.65
= 2 : 1
The empirical formula : Li₂O
Which of the following characteristics is NOT used to classify organisms into groups?
a.
nucleus or no nucleus
c.
color or no color
b.
autotroph or heterotroph
d.
unicellular or multicellular
Answer:
b
Explanation:
Consider the picture of a gas pump. Which type of gasoline has the highest percentage of octane (the main component of gasoline)?
unleaded: 87 octane rating
mid-grade: 89 octane rating
premium: 91 octane rating
Answer:
premium: 91 octane rating
Explanation:
Octane number refers to the percentage or volume fraction of isooctane in a fuel.
The octane number gives a picture of how safe a fuel is for an engine. The higher the octane rating the lesser the tendency of the fuel to cause knocking of the engine.
The type of gasoline with the highest percentage of octane among the options is premium.
HELP PLEASE!!!
How are both stability and change seen in properties of elements?
Answer:
In both natural and built systems, stability and change are an important focus of study for both scientists and engineers. Stability refers to a system that is unchanging. ... A dynamic equilibrium exists when chemical reactions or physical movements occur at rates that balance out, creating no net change in a system.
Answer:
In both natural and built systems, stability and change are an important focus of study for both scientists and engineers. Stability refers to a system that is unchanging. ... A dynamic equilibrium exists when chemical reactions or physical movements occur at rates that balance out, creating no net change in a system.
Explanation:
Help me please it’s due today
Answer:
The girl is 300N as she is staying still, and not buried in the ground or flying, hence, it has to be the same as the force pushing down. Sorry, can't answer about the rocket one.
Explanation:
The law of conservation of momentum states that if objects exert forces only on each other, their total momentum is ____________. Group of answer choices
Answer:
Conserved.
Explanation:
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex] Momentum = Mass * Velocity [/tex]
The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.
This ultimately implies that, the law of conservation of momentum states that if objects exert forces only on each other, their total momentum is conserved.
Why is the use of high-frequency radio waves a beneficial technological advancement
for humans? Explain.
A. They have the best penetration.
B. They carry more information.
C. They travel over longer distances.
D. They do not require mediums to transmit.
I
Answer:
I think It's C
Explanation:
due to higher waves can get easy transfers and receive those signals for most things, such as radios, TVs, phone signals etc etc
The use of high-frequency radio waves, a beneficial technological advancement for humans because they travel over longer distances.
What is frequency ?The frequency of a repeated event is its number of instances per unit of time. In certain cases, it is also referred to as temporal frequency or ordinary frequency to underline differences with spatial and angular frequencies, respectively.
The number of waves that pass a specific place in a predetermined period of time is known as the wave frequency. The hertz (Hz) is the SI unit for wave frequency, where 1 hertz is equivalent to 1 wave crossing a fixed point in 1 second.
The vibrations that created the wave had the same frequency as the wave itself. For instance, you need to move a rope up and down faster to produce a wave with a greater frequency.
Thus, option C is correct.
To learn more about frequency, follow the link;
https://brainly.com/question/5102661
#SPJ2
What is a disadvantage of geothermal energy
Answer:
it runs the risk of triggering earthquakes. releases harmful gases
The empirical formula denotes the exact number of atoms of each
element present in a compound.
Answer:
False, the empirical formula denotes the smallest whole-number ratio of atoms in a compound
Explanation:
a molecular formula is the total number of atoms in the compound
The chemical formula for copper (II) phosphate is Cu3(PO4)2. What is the charge on each copper ion?
2+
2-
3-
6+
3+
The chemical formula for copper (II) phosphate is Cu₃(PO4)₂. The charge on each copper ion is +3. Therefore, option E is correct.
What is the chemical formula ?The term chemical formula is defined as the constituent components of a compound together with the number of atoms in each element's smallest unit, such as a molecule or formula unit.
Given a chemical formula, we may name simple compounds by using the names of the components and a few simple principles.
The simplest whole-number ratio of the atoms in a compound is demoed by empirical formulae, the number of each type of atom in a molecule is shown by molecular formulas, and the bonds between the atoms in a molecule are shown by structural formulas.
The charge on each copper ion is +3,the subscripts balance the electrical charge.
Thus, option E is correct.
To learn more about the chemical formula, follow the link;
brainly.com/question/29031056
#SPJ5
An element is
A) made of only one kind of atom.
B) made of compounds from the periodic table.
C) made of different atoms physically combined together.
D) made of different kinds of atoms chemically combined.
a car is running with the velocity of 12 kilometre per hour what will be its velocity after 5 seconds if its acceleration is 2 metre
The velocity after 5 second =19 m/s
Further explanationGiven
Initial velocity =vi = 12 km/h=3.3 m/s
Time=t = 5 s
Acceleration=a = 2 m/s²
Required
Final velocity, vf
Solution
Motion with constant acceleration
Can be formulated :
vf=vi+at
Input the value :
vf=3.3+2.5
vf=9+10
vf=19 m/s
Restate the back on information in your own words what is boyles law? What relationship do you expect to see between pressure and volume why?
Boyle's law states that the pressure of the given quantity inversely varies with its volume at a constant temperature.
Which of the following is true about the electron configurations of the noble gases?
A) The highest occupied s and p shells are completely filled.
B) The highest occupied s and p shells are partially filled.
C) The electrons with the highest energy are in a d sublevel.
D) The electrons with the highest energy are in an f sublevel.
How are gases and liquids different from each other
Answer:
Gases, liquids, and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. Gas is well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation:
The expression 1223 ÷ r can be used to find how many batches Tyra can make with the sugar she has. If r is 23 cup, how many batches of cookies can Tyra make?
Answer:
Tyra can make 53 batches
Explanation:
Given
[tex]Batches = \frac{1223}{r}[/tex]
Required
Find the number of batches when r = 23
To do this, we simply substitute 23 for r in [tex]Batches = \frac{1223}{r}[/tex]
So, we have:
[tex]Batches = \frac{1223}{23}[/tex]
[tex]Batches = 53.17[/tex]
Approximate:
[tex]Batches = 53[/tex]
The abnormally high boiling point of HF as compared to HCl is primarily due to intermolecular forces of attraction called
A) network bonds
B) electrovalent forces
C) hydrogen bonds
D) van der Waals forces
Answer:
C) hydrogen bonds
Explanation:
The abnormally high boiling point of HF compared to HCl is primarily due to the intermolecular forces called hydrogen bonds.
Hydrogen bonds are intermolecular forces of attraction between polar molecules in which a hydrogen atom is directly joined to a highly electronegative atom (oxygen, nitrogen or fluorine).
Hydrogen bonds are very strong force of attraction compared to dipole - dipole attraction that holds the HCl together.
_____ was Isaac Newton’s first contribution to the scientific community.
Principia
The infinite series
The reflecting telescope
The refracting telescope
Answer:
Principia
Explanation:
Which of the following values is properly converted?
2000 L = 1000 mL
05.25 cm = 0.000525 mm
35 mg = 0.35g
6 km = 6000000 mm
Properly converted : 6 km = 6000000 mm
Further explanationGiven
Conversion of units
Required
Proper conversion
Solution
In converting units we must pay attention to the conversion factor between units
Let kg to g, then the conversion factor is 10³
1. L to mL = 10³
2000 L to ml = 2.10⁶ ml
wrong conversion
2. cm to mm = 10
5.25 cm = 52.5 mm
wrong conversion
3. mg to g = 10⁻³
35 mg = 35 x 10⁻³ g = 3.5 x 10⁻⁴ g
wrong conversion
4. km to mm = 10⁶
6 km = 6 x 10⁶ mm
proper conversion
Rift valleys can form when fractures in Earth's crust widen. The valley walls slowly move apart at a rate of only a few millimeters a year.
Which type of boundary would rift valleys form at?
A. Convergent
B. Divergent
C. Transform
D. Transform Fault
Answer:
B. Divergent
Explanation:
Rift valleys are usually formed at divergent margins where fractures in the earth's crust widens.
The fracture widens due the pulling apart of the plates that are involved.
Most rift valleys are located within the continental crust. One of the prominent rift margins in the world is the East Africa rift valley system. This creates a crack within the earth that continues to grow as the separation continues.PLZ ANSWER IN THE NEXT 24 HOURS MANY POINTS!!!!!!!!
You have found a new element with the atomic mass of 119. In a paragraph explain where you would put in on the periodic table and why you would put it there. What type of properties would this element have? What would you call it?
Answer:
Ununennium.
Explanation:
Ununennium, also known as eka-francium or element 119, is the hypothetical chemical element with symbol Uue and atomic number 119. It's Mass number is [315] (predicted), as we as it is existing on the periodic table hence its symbol: Uue
Answer B
Explanation:
hereI wpould put it on t
2AlF3 + 3K2O → 6KF + Al2O3
How many grams of AlF3would it take to make 15.524 g of KF?
7.4797 g AlF₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Reading a Periodic TableExplanation:Step 1: Define
[RxN] 2AlF₃ + 3K₂O → 6KF + Al₂O₃
[Given] 15.524 g KF
Step 2: Identify Conversions
[RxN] 2 mol AlF₃ = 6 mol KF
Molar Mass of Al - 26.98 g/mol
Molar Mass of F - 19.00 g/mol
Molar Mass of K - 39.10 g/mol
Molar Mass of AlF₃ - 26.98 + 3(19.00) = 83.98 g/mol
Molar Mass of KF - 39.10 + 19.00 = 58.10 g/mol
Step 3: Stoichiometry
Set up: [tex]\displaystyle 15.524 \ g \ KF(\frac{1 \ mol \ KF}{58.10 \ g \ KF})(\frac{2 \ mol \ AlF_3}{6 \ mol \ KF})(\frac{83.98 \ g \ AlF_3}{1 \ mol \ AlF_3})[/tex]Multiply/Divide: [tex]\displaystyle 7.47966 \ g \ AlF_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 5 sig figs.
7.47966 g AlF₃ ≈ 7.4797 g AlF₃
Answer:
7.4798
Explanation:
i just did the quiz, the guy above me is wrong.
An ____,or an element located in group 7A, will form a salt when reacted with a metal atom.
A. Alkali metal
B. Halogen
C. Noble gas
D. Transition metal
Answer:
B. Halogen
Explanation:
Halogens are the family of chemical elements found in the group VIIA of the periodic table which means they possess seven (7) outer electrons. Some examples of halogens are Fluorine (F), Iodine (I), Bromine (Br), and Chlorine (Cl).
A halogen, or an element located in group 7A, will form a salt when reacted with a metal atom.
For example, when Chlorine reacts with Sodium it would form a salt known as Sodium Chloride.
Na + Cl ----> NaCl
Veronica's teacher asked her to add another material that will dissolve in water into her beaker of sugar water. Which material should she add and how could she get it to dissolve quickly?
Answer:
she should add salt to the mixture
Explanation:
salt is easily able to dissolve
- Is energy absorbed or released by a material during the phase change from a solid to a liquid?
A)Absorbed
B)Released
Answer:
A) Abosrbed
Explanation:
The change is endothermic, meaning the material absorbs energy when it changes its phase from a solid to a liqiud.
What type of reaction is show below? MgBr2 (s) --> Mg (s) + Br2 (I)
Answer:
Option D. Decomposition reaction
Explanation:
MgBr₂ (s) —> Mg (s) + Br₂ (l)
To know which option is correct. It is important that we have an understanding of what each option means.
1. Synthesis reaction: This is a type of reaction in which two different elements react to produce a new compound different from the two elements that reacted. e.g
A + D —> AD
2. Combustion reaction: This is a reaction which involves a compound and oxygen to produce carbon dioxide (CO₂) and water (H₂O) e.g methane (CH₄) undergoes combustion reaction as follow:
CH₄+ 2O₂ —> CO₂ + 2H₂O
3. Single Replacement reaction: This is a reaction in which one element replaces or displaces another element in a single compound. This is illustrated below:
X + WZ —> XZ + W
We can see that the X replaces W in the reaction.
4. Decomposition reaction: This is a type of reaction in which a compound decompose or breaks into two or more simple compounds or elements e.g
ZX₄ —> Z + 4X
From the above illustrations, we can conclude that the the reaction:
MgBr₂ (s) —> Mg (s) + Br₂ (l)
Is a decomposition reaction because MgBr₂ breakdown into Mg and Br₂
___ is a measure of gravity's pull on an object.
Volume
Weight
Mass
Answer:mass
Explanation:
Answer:
weight is the measure of the force of gravity pulling on the object. mass is the measure of the object's matter.
What does the cell nucleus contain~
A. Chromosomes
B. Cytoplasm
C. Vacuoles
D. Chloroplasts
Please answer correctly :3
Answer:
A. Chromosome
Explanation:
Chromosomes carry the genetic info, and the nucleus stores it.
Hope this helps :D
Helppppppp I have a brain fart ....
Answer:
Hello there!
The first answer is hot
The second answer is sunshine!
Explanation:
Those make the most sense
Have a great day!
Answer:
bran fart is kewl
Explanation:
yes
Write complete electron configuration for each of the
following elements:
(a) scandium
(c) bromine
(b) cesium
(d) oxygen
Which pair of compounds has the same empirical formula? C₂H₂ and C₆H₆ C₂H₆ and C₃H₆ C₂H₅OH and CH₃OH CH₃CHO and C₃COOH
Pair of compounds have the same empirical formula :C₂H₂ and C₆H₆
Further explanationGiven
Carbon compound
Required
The same empirical formula
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
C₂H₂ and C₆H₆
Empirical formula CH
(CH)₂=C₂H₂
(CH)₆=C₆H₆
C₂H₆ and C₃H₈
C₂H₆: Empirical formula CH₃
C₃H₈: Empirical formula C₃H₈
C₂H₅OH and CH₃OH ⇒ Empirical formula
CH₃CHO: Empirical formula : CH₃CHO
CH₃COOH: Empirical formula CH₂O