distillation
filtration
distillation
sedimentation
using magnet
Hope this helps
Animal cells contain one large, central vacuole while plant cells have
many smaller vacuoles throughout the cell.
True or false?
Waste removal is carried out in the:
chromosomes
chloroplasts
cytoplasm
nucleus
*
1. Which of the following correctly represents an element?
H20 - Water
NaCl - Sodium Chloride
о O
H - Hydrogen
Answer:
H20 because u can touch it
An option that correctly represents a chemical element is known as hydrogen. Thus, the correct option for this question is D.
What is a Chemical element?A chemical element may be defined as a type of substance that can't be broken down into its simpler form by non-nuclear reactions. It is generally composed of a species of atoms that have a given number of protons in their nuclei.
According to the context of this question, water is a compound because it is made up of water molecules. Water molecules are made up of atoms of hydrogen and oxygen. Sodium chloride is also a chemical compound because it is also made of atoms of sodium and chlorine.
Therefore, an option that correctly represents a chemical element is known as hydrogen. Thus, the correct option for this question is D.
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Aluminum:
what is the color?
is it shiny or dull?
is it malleable, ductile, or brittle?
is it a conductor, magnetic, or neither?
is it a metal or a nonmetal?
where is it located on the periodic table on the left side of the stairs or right side of the stairs?
1. Write the electron configuration for Al (aluminum). Then, write the noble gas configuration. Finally, draw
the orbital diagram. (Non-anonymous question ) (50 Points)
Answer:
[Ne] 3s² 3p¹
1s2 2s2 2p6 3s2 3p1
Explanation:
please can you help me with this
Answer:
RQS + PQS = 180 ------- sum of angles on a
straight line
(2x + 14) + (x + 16) = 180
2x + 14 x + 16 = 180
2x + x + 14 + 16 = 180
3x + 30 = 180
3x = 180 - 30
3x = 150
x = 150/3 = 50
L is the midpoint of VC
LV = 9 find VC
Answer:
VC = 18
Explanation:
Since L is the midpoint and you have LV, you know that LC is also 9.
From the options provided for each element below, choose the properties that it may have based on its location in the periodic table. Magnesium (Mg): less reactive than sodium dull a gas Fluorine (F): highly reactive nonmetal shiny a conductor
Answer:less reactive than sodium
Explanation:
Answer:
Fluorine (F):
highly reactive nonmetal
Explanation:
A chemistry graduate student combines 4.0 grams of potassium and 13.0 grams
of iodine to form potassium iodide. According to the law of conservation of mass,
how much potassium iodide should be formed if the reaction proceeds to
completion?
Answer:
when the reaction is complete 17 g product must be obtain.
Explanation:
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given reaction,
2K + I₂ → 2KI
4 g + 13.0 g = 17 g
17 g = 17 g
So when the reaction is complete 17 g product must be obtain because the amount of reactants were 17 g and according to law of conservation of mass ,mass can neither be created nor destroyed in a chemical equation but only convert from one to another form.
Another example:
In photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction also followed the law of conservation of mass.
is beer a substance or mixture
If you get to addicted to it It would be a substance because you would be addicted to it ( like being addicted to a drug) . If your not addicted and drink beer to have a good time it is mixture.
1. The standard molar volume of a gas is 22.4L true or false
Hello! My name is Chris and I’ll be helping you with this problem.
Date: 9/28/20 Time: 9:45 am CST
Answer:
True
Explanation:
The standard occupies a volume of 22.4L
I hope this helped answer your question! Have a great rest of your day!
Furthermore,
Chris
How many atoms does Zirconium have ?
Answer:
Name Zirconium
Atomic Number 40
Atomic Mass 91.224 atomic mass units
Number of Protons 40
Number of Neutrons 51
Explanation:
+
Convert 0.406 km into cm
Answer:
The answer is 40600 because of the formula
Answer: 40600
Explanation: You just have to times 100,000 and 0.406
It would look like this...
0.406 * 100,000
or
0.406 x 100,000
---------------------------------------------------
The formula is "multiplying the length value by 100000"
Hope this helps!
Which formula represents a convalent compound
H2O2, CaO, MgS, NaCl
The answer is H2O2 hope u have a good day
Answer:
H2O2
Explanation:
i took the test
PLEASE HELP ME ASAP!!
The amount of oxygen in the reactants is 4 atoms. In the products, the oxygen is distributed to water (H20) and O2 gas. Which coefficients would be placed in front of water and oxygen?
2 in front of water and 2 in front of oxygen O
1 in front of water and 2 in front of oxygen O
1 in front of water and 1 in front of oxygen O
2 in front of water and 1 in front of oxygen
Answer:
D. 2 in front of water and 1 in front of oxygen
Explanation:
This would even out the equation.
which of the following statements are correct? Rewrite each false statement to make it true. (a) Elements listed in rows on the periodic table are in the same family. (b) Elements in the same column of the periodic table exhibit the same physical properties. (c) Elements in the same group are in the same family. (d) Elements that are side by side on the periodic table belong to the same period.
Answer:
c)elements in the same group are in the same family
The elements in the same column are in the same family.
The periodic table is arranged in rows and the periods. The elements in the same row has the same number of shells. The elements in the same column are in the same family.
The correct statements are;
Elements in the same column of the periodic table exhibit the same physical properties. Elements in the same group are in the same family. Elements that are side by side on the periodic table belong to the same period.Learn more: https://brainly.com/question/20906233
. Name three types of energy that exist in a large piece of charcoal on a grill in the sunlight. Explain why the charcoal has each type of energy. (3 points)
Answer:
Chemical Energy, Heat Energy, Radiant(Solar) Energy
Explanation:
First of all, in the large piece of charcoal, there is Chemical energy is stored in it's hydrocarbon molecules. Now, when the charcoal is placed under the grill, it is combusted and then the chemical energy is transformed into heat energy.
Also since it's exposed under sunlight, the charcoal will experience the effect of radiant(solar) energy.
what is the formula for vanadium oxide
Vanadium(V) oxide is the inorganic compound with the formula V₂O₅. Commonly known as vanadium pentoxide, it is a brown/yellow solid, although when freshly precipitated from aqueous solution, its colour is deep orange. Because of its high oxidation state, it is both an amphoteric oxide and an oxidizing agent.
formula:V2O5
pls mark as brainliest
Answer:
is it vanadium v oxide or just vanadium oxide
Explanation:
A science class investigated the relationship between the amount of time
students spend doing chores every night and their average grades on
schoolwork. Which statement from the lab report best represents a
conclusion?
A. Based on our results, students who do 1 hour of chores per night
have grades that are on average 0.2 points higher than students
who do no chores.
B. Doing chores at night actually helps students do better at school,
even if it seems like the opposite would be true.
C. We believe that students should spend at least 2 hours doing
chores every night if they want to get better grades at school and
help their families.
O D. If students spend at least 1 hour per night on chores, then they are
guaranteed to get higher grades on their schoolwork.
Answer:
A
Explanation:
Did the quiz
The statement from the lab report best represents a conclusion, based on our results, students who do 1 hour of chores per night have grades that are on average 0.2 points higher than students who do no chores. The correct option is A.
What is a scientific investigation?A scientific investigation is an investigation that is done by experimenting or solving things by scientific methods. These methods include variables, and controlled calculation and time.
Here, the lab investigation is saying the relationship between the number of times students are spending the time doing chores every night
Thus, the correct option is A. According to our findings, pupils who perform one hour of chores each night earn, on average, 0.2 points more than those who do not.
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Craig and Hunter want to know what exercise will give them the biggest biceps. They
will be testing pushups vs. lifting weights. They want to make sure it is dependent on
exercise type so they will test it with 6 of their friends. The experiment will last 2
weeks.
Identify the Question:
Independent Variable
(What changed?)
Dependent Variable
(Measured)
Controls
(Kept the same?)
A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity?
The 20 protons in each atom of calcium
The density of calcium, which is 1.54 g/cm3
The atomic mass of calcium, which is 40.078 amu
The 2 valence electrons in each atom of calcium
Answer:D
Explanation:
Took the quiz
The 2 valence electrons in each atom of calcium this is a characteristic of calcium are most closely related to its chemical reactivity. Hence, option D is correct.
What is calcium?Calcium is a chemical element with the symbol of (Ca).an atomic number of calcium is 20.it is an alkaline earth metal. The atomic mass of calcium is 40.078 unit.
When metal atoms are reacts by losing they're losing their valence electrons. So, the reactivity of a metal depends on how easily its atoms lose valence electrons.
Calcium is a major mineral in our bones.
If you don’t get the right amount of calcium, you lose more bone strength.
The chemical reactivity of an element is dependent on its valence electrons and the distance of its valence electrons from the atomic nucleus.
The 2 valence electrons in each atom of calcium this is a characteristic of calcium is most closely related to its chemical reactivity. Hence, option D is correct.
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describe the indivisible particle
Answer:
Matter is composed of indivisible building blocks. ... The Greeks called these particles atomos, meaning indivisible, and the modern word “atom” is derived from this term. Democritus proposed that different types and combinations of these particles were responsible for the various forms of matter.
I hope this helped
Ap sublevel has 3 electrons. How should they be arranged
A.)Two electrons in the first p orbital and one in the second p orbital
B.)All electrons are in the first orbital
C.)One electron in each p orbital
D.)One electron in the first shorbital and 2 in the second
Answer:
If a sublevel p has 3 electrons, all electrons are in the first p orbital .
Explanation:
According to the rules for establishing the energy level of an element, the sublevel "p" has a capacity for 6 electrons, so a sublevel p with 3 electrons will accept all of those electrons.
An example is nitrogen, with Z = 7, whose electronic level can be written
1s²2s² 2p³
- Two electrons on level 1 sublevel s
- Five electrons on level 2, of which two are in sublevel s and three in sublevel p.
The other options are incorrect:
A and C. It is not possible, because p accepts up to 6 electrons.
D. All sublevels "s" accept up to two electrons, with the exception of hydrogen (z = 1) which has only one electron in the first sublevel s 1s¹.
are sand and water a heterogeneous or homogeneous
Answer:
Salt is soluble in water, which would give a homogeneous mixture. But, when you add sand, which is insoluble, you will have a mixture of two different phases, a solid and a liquid, therefore this is a heterogenous mixture.
Explanation:
Answer:
Sand and water heterogenous mixtures
Explanation:
Source Socratic Chmistry mixtures
A serving of potato chips contains 2400 mg of sodium. How many significant figures are in the number?
Question 3 options:
3
2
4
1
Answer:
2 and 4
Explanation:
Non zero numbers are always significant.A zero between two non zero numbers is significant.Trailing zeroes at the decimal part are significant.Best of Luck!
Answer:
there are 2 significant figure in number.
significant no.are 2 and 4.
According to the following reaction, how many moles of iron(III) chloride will be formed upon the complete reaction of 26.2 grams of iron with excess chlorine gas ?
iron(s) + chlorine(g) iron(III) chloride(s)
Answer:
0.469 mol FeCl₃
Explanation:
Your reaction as a chemical equation is:
2 Fe (s) + 3 Cl₂ (g) ⇒ 2 FeCl₃ (s)
You have 26.2 grams of iron. Convert to moles of iron.
(26.2 g)/(55.845 g/mol) = 0.4692 mol
Use the mole ratio from the chemical equation to convert moles of iron to moles of iron(III) chloride.
(0.4692 mol Fe) × (2 mol FeCl₃/2 mol Fe) = 0.469 mol FeCl₃
You will have 0.469 moles of iron(III) chloride at the end of the reaction.
0.469 moles of iron(III) chloride upon the complete reaction of 26.2 grams of iron with excess chlorine gas
What do you mean by Moles?Its a typical scientific unit used to measure vast numbers of extremely small objects, such as atoms, molecules, or other specific particles.
Iron content in you is 26.2 gram. Transform into moles of iron.
(0.4692 mole) = (26.2 g)/(55.845 g/mole)
Converting moles of iron to moles of iron(III) chloride requires using the mole ratio from the chemical equation.
(2 mole FeCl3/2 mole Fe) (0.4692 mole Fe) = 0.469 mole FeCl3
.
After the process, you will possess 0.469 moles of iron(III) chloride.
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A substance has ______________________ which are __________________________.
What is the mass of 20.0 mL solution if its density
is 1.84 g/mL?
Answer:
mass=36.8 g
Explanation:
density = mass/ volume
mass= density × volume
mass= 1.84× 20.0
mass=36.8 g
The mass of 20.0 mL solution if its density is 1.84 g/mL is 36.8 g.
What is the density of the solution?The density of the solution may be defined as the ratio of the mass of the solution and the volume of the solution which can be represented as Density = mass of solution/volume of solution.
The density of the solution may be depicted with the help of the symbol ρ, commonly known as a row.
The mass of the given solution is calculated by the formula:
Density = mass/ volume
But here we have to calculate mass, so mass = density × volume.
Mass = 1.84× 20.0
Mass = 36.8 g.
Therefore, the mass of 20.0 mL solution if its density is 1.84 g/mL is 36.8 g.
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When designing an experiment, the first step is to. ______. Group of answer choices a. hypothesis b. list a procedure c. state the problem d. analyze the data
Answer:
A
Explanation:
It's the scientific method
1 lb = 16 oz conversion factors
Answer:
In the North, ______ were used to keep black and white people apart.
ASocial customs incorrect answer
BState laws incorrect answer
CFederal laws incorrect answer
DCourt orders:
