Drag the tiles to the correct boxes to complete the pairs.
Chromium is a transition metal, and oxygen has an oxidation number of -2. Use this information to match each compound to its chemical formula.
Answers
Related Questions
Need Help!!Atomic Structure escape room. Enter 4 digit code(no spaces)
Answers
Answer:
9146
Explanation:
The letters are in the place of the number on the clock. A is in the place of 9, B is in the place of 1, and so on. I hope I was correct!
Answer:
9641
Explanation:
oxygen wants to lose two electrons which results in a +2 charge. is that true or false
Answers
Answer:
false
Explanation:
electronic configuration of oxygen is 2,6 that means it has 6 electrons in its last shell. but it can hold 8.so it is unstable so to be stable oxygen needs another 2 electrons so that it becomes 8 ( 6 + 2 = 8 )
so oxygen takes 2 electrons which result in -2
Gaining electrons will get you a negative charge while losing electrons will get you a positive charge
The solid obtained at the neck of a funnel in sublimation is called....................?(mixture)
Answers
Answer:
Sublimate
Explanation:
The solid obtained at the neck of a funnel in sublimation is called the sublimate.
This substance is a solid.
Sublimation process is a phase change. In this process, a solid is directly changed to gas or gas changed to solid. Heat must be added to change the solid to gas and heat removed for the reverse process. Not all substances have this capability.Aluminium is produced by electrolysis of a molten mixture.
What two substances does the molten mixture contain??
Answers
Answer:
cryolite and oxide
Explanation:
The molten mixture contain what is referred to as cryolite and aluminium oxide in electrolytic production of aluminium.
What is an Electrolyte?This is a chemical substance which when dissolved in water conducts electricity.
The aluminium oxide and cryolite mixture are involved in the production of aluminium with carbon dioxide being given off.
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What are the effects of UV radiation from the sun when it is absorbed by the skin
Answers
Answer:
A common effect of UV radiation is erythema or sunburn.
Explanation:
This happens when skin cells are damaged by the absorption of energy from UV rays.
Answer:
A common effect of UV radiation is erythema or sunburn.
Explanation:
This happens when skin cells are damaged by the absorption of energy from UV rays.
A forklift applies a force of 2,000 N to raise a box 3 m.
How much work is done by the forklift in raising the
box?
Answers
If the force is applied to lift the box, then there is no work done as the displacement of the box is not in the same direction of the box.
However, if the force is being applied to move the box in the direction of the force, then the work done is:
Work = force x distance
Work = 1500 x 3
Work = 4,500 Joules
A forklift applies a force of 2,000 N to raise a box 3 m. The work is done by the forklift in raising the box is 6000 Joules.
What is force ?A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity, since it has both magnitude and direction.
Isaac Newton's three laws of motion, which are outlined in his Principia Mathematica, are frequently used to illustrate the concept of force (1687).
Contact forces and act at a distance forces are the two different types of forces. Your daily use of force is evident. Basically, push and pull are forces. You exert force on an object when you push against it or pull against it.
The force is applied to move the box in the direction of the force,
Then the work done is
Work = force x distance
Work = 2000 x 3
Work = 6000 Joules.
Thus, A forklift applies a force of 2,000 N to raise a box 3 m. The work is done by the forklift in raising the box is 6000 Joules.
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what is the molar mass of tin (IV) sulfide
Answers
Answer:
182.81 g/mol
Explanation:
Hope this helpedddddddd
will mark BRAINLIEST!!
Answers
Explanation:
i think it is a polar bond but I am not sure
Answer:
i believe it forms a covalent bind by sharing the electrons, so closest would be Ionic
how do you think the number of electrons affects an element’s reactivity?
Answers
(Help) when nearly vertical rays of solar energy strike a region of the earth that area has warm temperatures what region of the earth gets nearly vertical rays of solar energy year around?
A) United States
B) Australia
C) North and South Poles
D) Equator
Answers
Answer:
D) The equator
Explanation:
To solve this we must be knowing each and every concept related to solar energy. Therefore, the correct option is option D among all the given options.
What is solar energy?Sun energy is the term for solar radiation that may create heat, trigger chemical processes, or create electricity. The total solar energy incidence on Earth is far greater than the global energy needs at the now and in the future.
Although sunlight is unquestionably the most potent energy source that Earth receives from the Sun, its intensity at the surface of the planet is really rather modest. When nearly vertical rays of solar energy strike a region of the earth that area has warm temperatures. Equator is the region of the earth that gets nearly vertical rays of solar energy year around.
Therefore, the correct option is option D.
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5.00 g zinc added to hudroclric acid what is the mass of hydrogen gas
Answers
Answer:
0.15g
Explanation:
Given parameters:
Mass of Zn = 5g
Unknown:
Mass of hydrogen gas = ?
Solution:
To solve this problem, we must first write the reaction expression;
Zn + 2HCl → ZnCl₂ + H₂
Now find the number of moles of the known specie which is Zn;
Number of moles of Zn = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of Zn = 65.4g/mol
Number of moles of Zn = [tex]\frac{5}{65.4}[/tex] = 0.08mole
1 mole of Zn will produce 1 mole of H₂
0.08 mole of Zn will give 0.08 mole of H₂
Mass of H₂ = number of moles x molar mass
molar mass of H₂ = 2(1) = 2g/mol
Mass of H₂ = 0.08mol x 2g/mol = 0.15g
What must a scientist do in order to develop a testable hypothesis?
O A. Be certain that the data collected will fully support the hypothesis.
B. Find out whether the hypothesis can also explain untestable
claims.
C. Make sure that no other scientist has investigated the topic
before.
O D. Determine whether it is possible to gather the necessary data.
Answers
Answer:
A
Explanation:
Be certain that the data collected will fully support the hypothesis
Answer: D. Determine whether it is possible to gather the necessary data.
which two elements are most likely to have similar physical properties?
pls help:)
Answers
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, sodium and potassium are the two element most likely to have similar physical properties.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
The chances are high that sodium and potassium share both physical and chemical characteristics. They are both members of the Alkali metals family. Both are extremely reactive and share the same valence electrons. The elements in the same group have same physical and chemical properties.
Therefore, sodium and potassium are the two element most likely to have similar physical properties.
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SnO₂ + 2H₂
+ 2 H2 → Sn + 2 H2O
Is it balanced or unbalanced
Answers
Answer:
I'm pretty sure it is unbalanced
The boiling point of water (H2O) is 100 °C. Which of the following best predicts the boiling point of hydrogen sulfide (H2S)? (5 points)
Answers
Answer:
Boiling point of H2S is (-60.2 C°)
Explanation:
This is very less than water because hydrogen bonding is present in water that is absent in H2S
How are monosaccharides and polysaccharides structurally different? *NO PLAGIARISM PLS*
Answers
Explanation:
Monosaccharides are simple carbohydrates that cannot be further hydrolyzed to simpler carbohydrates. They contain between three and six carbon atoms per molecule.
Polysaccharides are complex carbohydrates . They are condensation polymers derived from very long chains of monosaccharide units.
Structurally, polysaccharides are made up of repeating units of monosaccharides.
What might happen to the cryosphere if the insulating effect of the atmosphere increased?
Answers
Answer:
Acting like a highly reflective blanket, the cryosphere protects Earth from getting too warm. Snow and ice reflect more sunlight than open water or bare ground. Changes in snow and ice cover affect air temperatures, sea levels, ocean currents, and storm patterns all over the world.
Explanation: Hope this answers your question
How many moles are 7.25 x 1023 formula units of Mgo ?
O A) 1.31 moles
OB) 1.33 moles
OC) 1.42 moles
D) 1.20 moles
O E) 1.27 moles
OF) 1.51 moles
OG) 1.29 moles
Answers
Answer:
The answer is option DExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{7.25 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7.25}{6.02} \\ = 1.2043189368...[/tex]
We have the final answer as
1.20 molesHope this helps you
WILL GIVE BRAINLIEST
Answers
Answer:
1 Mole
Explanation:
1 mole is equal to 1 moles NH4, or 18.03846 grams.
which statement is true of a rock layer that had another rock layer deposited on top of it?
Answers
Answer:
second rock...I know it
How many aleles are there for the four main types of human blood?
one
two
three
four
Answers
Answer:
three alleles
Explanation:
Explanation:
what is copper in chemisry
Answers
29 63.546
Cu
Answer: Copper in Chemisry is an chemical element, a reddish, extremely ductile metal of Group 11 (Ib) of the periodic table that is an unusually good conductor of electricity and heat. Copper is found in the free metallic state in nature.
Explanation:
Is science btw HELP Question 1 What is the significance of a standard system of measurement?
A: Scientists from around the world need a way to share data they can all understand.
B: Every Country has its own set of measurement standards.
C: Scientists come from different cultural backgrounds.
D: The language spoken in different countries are different.
Question 2 Which of the following is the SI unit used by chemists to measure the amount of an element or substance?
A: Millimeter
B: Molecule
C: Atom
D: Mole
Question 3 Which is a measurement of distance that is used around the world?
A: 24 feet
B: 30 miles
C: 500 meters
D: 16 kilograms
Question 4 A centimeter is __________ meter(s)
A: 1,000
B: 100
C: 1/100th
D: 1/1000th
Question 5 Which of the following is equivalent to 140 centiliters
A: 14.0 milliliters
B: 1.4 deciliters
C: 0.00140 kiloliters
D: 0.140 liters
Answers
Answer:
b
Explanation:
Describe the relationship between the solubility rate of a gas and temperature.
25 points
Answers
Answer:
as temperature increases, solubility of gas decrease
MOST of the elements in the periodic table are
A. liquids at room temperature
B. metals
C. metalloids
D. nonmetals
Answers
Answer:
B. metals
Explanation:
Most of the elements in the periodic table are classified as metals. They are usually solid at room temperature.
The first and second block of the periodic table are all metallic elements. Those in the d-block are all metals. Metals generally occupy the s and d -blocks. Non-metals and metalloids are found in the p-blocksWould a drop of food coloring spread color more quickly throughout a container of
hot water or cold water? Why?
Answers
Answer:
I believe it’s hot water.
Explanation:
Drops of food coloring placed in hot water will spread color faster than drops of food color in cold water because the particles will move faster at higher temperatures.
Where did the word "atom" come from?
Answers
ancient Greece of 400 B.C.there was a brilliant philosopher named Democritus, and he proposed the Greek word atomos, which means uncuttable. And so as he explained, all matter was eventually reducible to discrete, small particles or atomos.
HElP PLS!! 20 points Which statement best describes a characteristic unique to renewable resources?
Renewable resources are abundant.
Renewable resources form slowly.
Renewable resources can be used to generate electricity.
Renewable resources are found in nature.
Answers
Answer:
renewable resources are abundant???
Answer:
renewable resources are abundant!
Explanation:
What is the molar mass of CHCl3?
48.47 g/mol
83.92 g/mol
119.37 g/mol
121.39 g/mol
Answers
119.37 g/mol
Further explanationRelative atomic mass (Ar) and relative molecular mass / molar mass (M)
the molar mass/molecular mass of a compound : the sum of the relative atomic mass (Ar) of the constituent atoms
M AxBy = (x.Ar A + y. Ar B)
Atomic weight (Ar) of :
C : 12.0107 g/mol H : 1.00784 g/mol Cl : 35.453 g/molThe molar mass of CHCl₃
[tex]\tt CHCl_3=12.0107+1,00784+(35,453\times 3)=119.37~g/mol[/tex]
The molar mass of [tex]CHCl_3[/tex] (chloroform) is 119.37 g/mol. Therefore, the correct option is C.
The organic compound chloroform, which has the molecular formula [tex]CHCl_3[/tex], is well known for its use as a solvent and anaesthetic. It consists of three chlorine atoms (Cl), one hydrogen atom (H), and one carbon atom (C).
The molar mass of carbon (C) is approximately 12.01 g/mol, the molar mass of hydrogen (H) is approximately 1.01 g/mol, and the molar mass of chlorine (Cl) is approximately 35.45 g/mol. We add up the molar masses of all the individual atoms to determine the molar mass of [tex]CHCl_3[/tex]:
(1 * molar mass of C) + (1 * molar mass of H) + (3 * molar mass of Cl)
(1 * 12.01 g/mol) + (1 * 1.01 g/mol) + (3 * 35.45 g/mol)
12.01 g/mol + 1.01 g/mol + 106.35 g/mol
The molar mass of [tex]CHCl_3[/tex] is approximately 119.37 g/mol.
Therefore, the correct answer is C.
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Why is it important to know the weather?
Answers
Answer:
so you can dress based on how hot or cold it's gonna be outside