Answer: C
Explanation: I believe it's C because I know A, B, and D are 100% correct
and if you look at solids, there pact together, pact together mean it cant move.
Given 10 gram samples of LiCl, LiBr, LiF, LiI, place the samples in order of least to greatest number of atoms of lithium, Li.
The given sample of 10 grams shows the mass of the following compounds.
(LiCl, LiBr, LiF, LiI).
To arrange them in hierarchical order from the least to the greatest, we need to determine their respective number of moles because it is directly proportional to their atomicity.
By using the formula:
[tex]\mathbf{Number \ of \ moles = \dfrac{mass}{ molar \ mass}}[/tex]
For LiCl, its molar mass = (42.39) g/mol
[tex]\mathbf{Number \ of \ moles = \dfrac{10 \ g}{42.39 \ g/mol}}[/tex]
number of mole for LiCl = 0.2359 moles
For LiBr, its molar mass = (86.85) g/mol
[tex]\mathbf{Number \ of \ moles = \dfrac{10 \ g}{86.85 \ g/mol}}[/tex]
number of mole for LiBr = 0.1151 moles
For LiF, its molar mass = (25.94) g/mol
[tex]\mathbf{Number \ of \ moles = \dfrac{10 \ g}{25.94 \ g/mol}}[/tex]
number of mole for LiF = 0.3855 moles
For LiI, its molar mass = (133.85) g/mol
[tex]\mathbf{Number \ of \ moles = \dfrac{10 \ g}{133.85 \ g/mol}}[/tex]
number of mole for LiI = 0.0747 moles
Therefore, we can conclude that the samples in hierarchical order from the least to the greatest is as follows:
LiI < LiBr < LiCl < LiF
Learn more about atomic numbers here:
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What did the Aboriginal people use to weave dilly bags?
Answer:
This bag has been made from introduced materials, but before foreign fibres were used dilly bags were made from bark, leaves, stems, roots, human hair, animal fur and animal sinew.
Can someone help me out on this ♡
Explanation:
Actually, the diagram showned in the picture gave you some hints.
Moving every one block to the left indicates 10 times the value of the symbol than the previous one.
For instance,
[tex]1\text{ km}=10^1\text{ hm}=10^2\text{ dam}=10^3\text{ m}[/tex]
Take the first question as example, since "k" is 9 blocks from the left of mu (u),
[tex]1 \text{ kg}=10^9 \text{ }\mu\text{g}[/tex]
[tex]\text{So }.000078\text{ kg}=.000078\times10^9 \text{ }\mu\text{g}=7.8\times10^{-5}\times10^9 \text{ }\mu\text{g}=7.8\times 10^4\text{ }\mu\text{g}[/tex]
Similarly,
[tex]1 \text{ cL}=10^{-2} \text{ L}[/tex]
[tex]\text{So }34800\text{ cL}=34800\times10^{-2} \text{ L}=3.4800\times10^{4}\times10^{-2} \text{ L}=3.48\times 10^2\text{ L}[/tex]
[tex]1 \text{ Mm}=10^{3} \text{ km}[/tex]
[tex]\text{So }.0283\text{ Mm}=.0283\times10^{3} \text{ km}=2.83\times10^{-2}\times10^{3} \text{ km}=2.83\times 10^1\text{ km}[/tex]
which step in the scientific method has an if/then statement
independent and dependent variables.
1)
Now it's time to state your hypothesis. ...
2) The hypothesis is often written using the words "IF" and "THEN." For example, "If I do not study, then I will fail the test." The "if' and "then" statements reflect your independent and dependent variables.
Does dried coconut give blue black color when iodine solution is added in it.
Answer:
I cant give a 100% answer but it will give a black color when low starch
Explanation:
Iodine test is used to determine the presence of starch in food items. If iodine is added to any food item and it causes the food item to turn to a blue-black color
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The collection of which of the following gases involves a catalyst?
A)oxygen
B)ammonia
C)carbon dioxide
Answer:
Ammonia
Explanation:
I believe that ammonia is the correct answer to this question.
4. Write the electronic configuration of first 20 elements in the periodic table.
Hydrogen: 1
Helium: 2
Lithium: 2•1
Beryllium:2•2
Boron: 2•3
Carbon: 2•4
Nitrogen:2•5
Oxygen:2•6
Fluorine: 2•7
Neon:2•8
Sodium: 2•8•1
Magnesium: 2•8•2
Aluminium: 2•8•3
Silicon: 2•8•4
Phosphorus: 2•8•5
Sulfur: 2•8•6
Chlorine: 2•8•7
Argon: 2•8•8
Potassium: 2•8•8•1
Calcium: 2•8•8•2
Please give me brainliest, I spent a lot of time doing this
write down the importance of solution in our daily life in any 4 points
Explanation:
Four importances :
1. Solution of tea leaves, water and sugar is used to make tea
2. Solutions of the chemicals are used in labrotary
3. The drinks that we take are also a kind of solution
4. The air is also a solution of different gases
The number of protons in one atom of an element determines the atom's ____________
and the number of electrons determines ___________
of an element.
Answer:
the number of protons in one atom of an element determines the atom's identity, and the number of electrons determines its electrical charge
Explanation:
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Number of
Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
20
20
A
B
С
9
D
E
19
F
Using the periodic table, complete the table to describe each atom. Type in your answers.
А
B
С
1 0
]
please help me with my question
Answer:
b
Explanation:
because I had that on my homework and got it correct
b
Explanation:
because I had that on my homework and got it correct
What is our cosmic address??
HELLO MAY SOMEONE PLZ HELP ME ON THIS!!!;$7&:
Answer:
Variable data is defined as information and figures used to build control charts. Variable data can be used to create average (X-bar) charts, range charts, and sample standard deviation charts or "S-charts."
Write three hundred as a numerical value with 3 sig figs
Answer:
300
Explanation:
According to the question we are to leave our answer in 3 significant figures. Therefore, we leave our answer as 300.
7. In an atom, electrons revolve around the nucleus in their shell. The K shell can only accommodate 2 electrons while L shell can accommodate 8 electrons. Give
Now lets she s-subshell structure .
Take an element Berylium
[tex]\huge{\overset{1s^2}{\boxed{\uparrow\downarrow}}\overset{2s^2}{\boxed{\uparrow\downarrow}}}[/tex]
You can see the S-orbital has only space for 2electrons .
So K shell has 2electronsCome to p-orbital
Take an element Neon
[tex]\huge{\overset{1s^2}{\boxed{\uparrow\downarrow}}\overset{2s^2}{\boxed{\uparrow\downarrow}}\overset{2p^6}{\boxed{\uparrow\downarrow}\boxed{\uparrow\downarrow}\boxed{\uparrow\downarrow} }}[/tex]
The 2 means its L shell .
It has 8 electrons only and full filled .
Hence L shell can have only 8electronsCan someone please help me
(1) One night while looking through his telescope,
Reginald saw three planets in the sky. X, Y. and
Z. X was smaller than Y, and Y was smaller than Z.
Was Z larger or smaller than X?
Answer:
Z was smaller than X
Explanation:
if X<Y and Y<Z
therefore X<Z
Back page anwsers of adobe sisters recap sheet
Answer:
I'm sorry, you didn't post the pictures.
A sample of iron oxide was found to contain 1.116 g of iron and 0.480 go foxygen. Its molar mass is roughly 5 times as great as that of oxygen gas. Find the empirical formula and molecular formula of this compound.
Answer: FeO2
Explanation:
1.116 g Fe
0.480 g O
We want to compare the NUMBER of Fe and O atoms. We only have their masses, but since the molar mass of Fe is 5 times that of O, let's multiply the grams of O by 5 to have it "catch up" to the iron in ternms of number of atoms. If the molar masses were the same, the masses would be in direct proportion to the formula. Since they aren't, multiply by the molar mass ratio:
(1.116 grams Fe) x 1 = 1.116 g Fe
(0.480 g O) x 5 = 2.40 g O [Changes the O mass into a number that correlates with the number of atoms relative to iron],
If the molar masses were the same, this would be the ratio of O to Fe atoms in the compound. Normalize to the Fe number by dividing both by 1.116:
Fe = 1
O = 2.15
Not perfect, but an empiricle formula of FeO2 makes sense. I don't see enough information here to prove that this is also the molecular formula, but FeO2 is a valid compound. Fe(IV)O2,
1. The empirical formula of the compound is Fe₂O₃
2. The molecular formula of the compound is Fe₂O₃
1. Determination of the empirical formula of the compound.
Fe = 1.116 g
O = 0.480 g
Empirical formula =?Divide by their molar mass
Fe = 1.116 / 56 = 0.02
O = 0.480 / 16 = 0.03
Divide by the smallest
Fe = 0.02 / 0.02 = 1
O = 0.03 / 0.02 = 1.5
Multiply by 2 to express in whole number
Fe = 1 × 2 = 2
O = 1.5 × 2 = 3
Therefore, the empirical formula of the compound is Fe₂O₃
2. Determination of the molecular formula of the compound.
Empirical formula = Fe₂O₃
Molar mass = 5 × molar mass of O₂ = 5 × 32 = 160 g/mol
Molecular formula =?Molecular formula = empirical × n = molar mass
[Fe₂O₃]n = 160
[(2×56) + (3×16]n = 160
[112 + 48]n = 160
160n = 160
Divide both side by 160
n = 160 / 160
n = 1
Molecular formula = [Fe₂O₃]n
Molecular formula = [Fe₂O₃] × 1
Molecular formula = Fe₂O₃Learn more: https://brainly.com/question/25591038
If the cardboard square has a light on it what do observe
Answer:you observe the light?
Explanation:
7) Explain how the atomic number of an element identifies the element.
Answer:
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. ... The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.
Answer:
Atoms of each element contain a characteristic number of protons. In fact, the number of protons determines what atom we are looking at (e.g., all atoms with six protons are carbon atoms); the number of protons in an atom is called the atomic number.
Explanation:
help please with this tough question
Answer:
option Boption AExplanation:
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Which is an example of a polymer?
Answer:
A: Cellulose
Explanation:
Cellulose in paper and tree
What is a mixture?
A.
two or more substances combined
B.
when a chemical reaction occurs and new
substances are formed
Answer:
A. two or more substances combinedExplanation:
As,
Mixture defines two or more substances that are physically combined with each other and are formed as solutions, suspension, and colloids
How many kilograms are in one teragram?
Answer:
0.0001 Tg 100000 kg
0.001 Tg 1000000 kg
0.01 Tg 10000000 kg
0.02 Tg 20000000 kg
Explanation:
A sample of a compound that contains only the elements C, H, and N is completely burned in O2 to produce 44.0 g of CO2, 45.0 g of H2O, and some NO2 . A possible empirical formula of the compound is
Explanation:
what you have to do is to multiply the given grams with the ratio of grams of that certain element in it's full compound in order to isolate the compound and get the element.
because the question did not specify how many grams of NO2 is formed, we can assume that the mass is neglegible, thus 1 mole was assigned to Nitrogen.
Convert rate of 271.7 gallons/min to an equivalent rate of cL/week. Present answer in scientific notation rounded to the proper number of significant figures.
Answer:
Convert the rate of 271.7 gallons/min to an equivalent rate of cL/week. Present your answer in scientific notation rounded to the proper number of sig figs.
Explanation:
Explain why changes of state are physical changes.
Solution: Change in state of matter is a physical change because of the physical condition and appearance changes but not the chemical composition.
Calculate the mass (in kg) of one golf ball
Answer:
0.04543 kg
Explanation:
try weighing a golf ball they are around 45.5 grams
The energy required to remove the third electron from a dipositive ion is
The energy required is Ionization energy
What is the formula for calculation of acceleration?
Answer:
see picture for answer
Explanation:
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