Answer:
We typically represent covalent bonds with a dash ( - ) between the atoms. This indicates a single bond. Ex: Cl - Cl
Single bond, double bond, triple bond.
Explanation:
We call it a single covalent bond because the atoms are sharing a single pair of electrons.
Answer: If you have this question: The bond order for a single covalent bond is ____.
Then the answer is oneExplanation:
How is a doorbell an example of an electrical transformation
As shown by the periodic table, why do the elements potassium and sodium have similar chemical properties?
how does the octet rule predict the stability or reactivity of atoms.
Answer:
Explanation:
The octet rule allows chemists to predict the placement of electrons around the nucleus (electron orbitals), the identification of electrons added or lost during chemical reactions and the chemical reactivity of atoms based upon their particular electron configuration.
d. what happens when an iron nail is kept in copper sulphate solution?
Answer:
it changes color from blue to light green.
Explanation:
due to copper iron nail functions
Answer:
give the other person brainlieset plz
Explanation:
If the ball is at rest on the soccer field and the four forces shown are applied at the same time, the ball will
А.
move to the left.
B. stay in the same position.
c. accelerate in the direction of the smallest force.
D. resist any change in movement.
Since the rightward force is greater than the leftward force by a magnitude of 10 Newton, the ball will: A. move to the left.
Given the following data:
Upward force = 50 Newton.Downward force = 50 Newton.Rightward force = 30 Newton.Leftward force = 40 Newton.A net force can be defined as the vector sum of all the forces acting on an object.
Hence, net force is the sum of all forces acting simultaneously on an object.
To determine the direction in which the ball would move if the four forces shown are applied at the same time:
For the downward and upward force:
[tex]Net\;force = 50-50\\\\Net\;force = 0\;Newton[/tex]
For the rightward and leftward force:
[tex]Net\;force = 40-30\\\\Net\;force = 10\;Newton[/tex]
Since the rightward force is greater than the leftward force by a magnitude of 10 Newton, the ball will move to the left.
Read more: https://brainly.com/question/22210180
which of the following is the correct formula formed from the following ions? Na, Cl
Answer:
NaCl
Explanation:
I'm not sure how to really explain this... it's NaCl though.
When a chemical reaction takes place, the number of atorns of each element in the reactants
nunber of atorms of each element in the products.
will be dferent from
must be equal to
Answer:
The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products
Explanation:
How much radium-226 will remain from a 20 gram sample after 4800 years?
Answer:
2.5 g mass of Ra-226 will remain after 4800 years.
Explanation:
Given data:
Mass of Ra-226 = 20 g
Sample remain after 4800 years = ?
Solution:
Half life of Ra-226 = 1600 years
Number of half lives passed = T elapsed / half life
Number of half lives passed = 4800 year / 1600 year
Number of half lives passed = 3
At time zero = 20 g
At first half life = 20 g/2 = 10 g
At 2nd half life = 10 g/2 = 5 g
At 3rd half life = 5 g/2 = 2.5 g
Thus, 2.5 g mass of Ra-226 will remain after 4800 years.
A pure substance is one that_____
a. Has been filtered
b. is an element or compound
c. If found in nature
d. Has been cleaned
Answer:
gimme points
Explanation:
Why is elemental zinc considered a pure substance?
Select one:
It is a metal.
It is a mixture of different atoms.
All elements are considered pure substances.
It must be created in a lab.
Answer: C... Because Zinc is made of only one type of atoms.
Explanation: All elements are made of one type of atom. Pure gold is made out of only gold atoms, silver out of only silver atoms, etc.
The units of a formula mass are
a. amu
b. micrograms
c. moles
d. grams
Answer:
the units of a formula mass are amu.
what are the materials made by chemists for use in washing clothes and cooking materials
Answer:
water
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A student is asked to determine the chemical formula for the compound Barium
chloride. When writing the chemical formula, what question will the student need to
ask to determine the correct formula?
What period does barium belong to?
Are barium and chlorine a metal and nonmetal?
What is the state of matter of each element that comprises the final formula?
What are the charges of each atom?
Answer:
Are barium and chlorine a metal and nonmetal?
Explanation:
I had the same question, and my class reviewed the test and this was the answer to this question.
Can someone help me please!
Answer:
It tells you on the chart I've attached. It's all color coded. :p
How many molecules of SrCrO4 are in a sample of SrCrO4 0.556 moles?
Answer:
[tex]3.35*10^{23}\ SrCrO_4\ molecules[/tex]
Explanation:
[tex]We\ are\ given\ that,\\No.\ of\ moles\ of\ SrCrO_4=0.556\\Hence,\\As\ we\ know\ that,\\No.\ of\ particles=Avagadro's\ Constant*No.\ of\ moles\\We\ already\ know\ that\ Avagadro's\ Constant=6.022*10^{23}\\Here,\\No.\ of\ SrCrO_4\ molecules= 6.022*10^{23}*0.556\\Hence,\\No.\ of\ SrCrO_4\ molecules=3.348*10^{23} molecules\ \approx 3.35*10^{23}\ SrCrO_4\ molecules[/tex]
does SiF4 have polar covalent bonds?
Answer:
SiF4 is not a polar covalent bond.
Explanation:
SiF4 is a nonpolar molecule because the fluorine's are arranged around the central silicon atom in a tetrahedral molecule with all of the regions of negative charge cancelling each other out.
The Earth's _____ provides protection from meteorite impacts by causing them to _____.
please leave a simple answer
Answer:
atmosphere, break up
Explanation:
Answer:
Atmosphere, break up
Explanation:
Margarita set up three vials on a hot plate. She poured the same amount of
liquid into each of the vials, and then she turned on the hot plate. Which event
could be a significant source of error in her experiment?
Answer: Since the vials are filled the same, and are placed on the same hot pad, all the water will evaporate at the same time
Explanation:
The source of error in the experiment is the vials being filled the same, and placed on the same hot pad, all the water evaporating at the same time .
What are errors?Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.
There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.
Errors while measuring boiling point may be human errors while noting down the boiling temperature or instrumental or systematic error if there is a fault in the thermometer.
Learn more about error,here:
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What is one way in which sound and light are alike?
They both travel easily through wood.
They are both types of energy.
They both can travel through outer space.
They both make it easier for you to see what you are doing.
Answer:
B)They are both types of energy.
Explanation:
Answer:
they both travel easily through wood
Explanation:
i don't want your rbx i just wanna help you:)
A block is pulled 0.90 m to the right in 3.75 s.
What is the block’s average speed to the nearest hundredth of a m/s?
Answer:
0.36 m/s
Explanation:
im in 8th grade in honors science and i think, since u have distance and time you have to divide distance by time
What math is used to find density?
Answer:
[tex]\huge\mathtt{{\colorbox{silver}{ANSWER~~~↴}}}[/tex]
Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).
▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃
AB + energy→ A +B
23.
The general equation shown is a reaction that is an
a. exothermic decomposition
b. endothermic decomposition
c. endothermic synthesis
d. exothermic synthesis
Answer:
b. endothermic decomposition
Explanation:
Decomposition reaction:
It is the reaction in which one reactant is break down into two or more product.
AB → A + B
Synthesis reaction:
It is the reaction in which two or more simple substance react to give one or more complex product.
A + B → AB
Endothermic reactions:
The type of reactions in which energy is absorbed are called endothermic reactions.
In this type of reaction energy needed to break the bond are higher than the energy released during bond formation.
For example:
C + H₂O + 131 kj/mol → CO + H₂
Thus, in given reaction energy is added and AB compound is decomposed to give A and B so this reaction is endothermic decomposition.
What's the Balance equation for:
_C4H10O +_ O2--->_CO2+_H20
Answer:
C₄H₁₀O + 6O₂ ⇒ 4CO₂ + 5H₂O
Explanation:
Match the amount of reactants and products on both sides of the equation.
The partial symbol for a particular ion is 26M2+ What are the number of electrons contained in one ion
Answer:
24
Explanation:
26-2=24 because when an atoms loses 2 electrons it gains 2+ charge
Why do covalent compounds tend to be squishy?
Answer:
Since they're easy to separate, covalent compounds have low melting and boiling points. 2) Covalent compounds are soft and squishy (compared to ionic compounds, anyway). The reason for this is similar to the reason that covalent compounds have low melting and boiling points. When you hit an ionic compound with something, it feels very hard
Explanation:
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A 1.25 g sample of aluminum is reacted with 3.28 g of copper (II) sulfate. What is the limiting reactant?
2Al(s) + 3CuSO4(aq) = Al2(SO4)3(aq) + 3Cu(s)
Select one:
a. Copper
b. Aluminum sulfate
c. Aluminum
d. Copper (II) sulfate
Answer:
d. Copper (II) sulfate
Explanation:
Given data:
Mass of Al = 1.25 g
Mass of CuSO₄ = 3.28 g
What is limiting reactant = ?
Solution:
Chemical equation:
2Al + 3CuSO₄ → Al₂ (SO₄)₃ + 3Cu
Number of moles of Al:
Number of moles = mass/molar mass
Number of moles = 1.25 g/ 27 g/mol
Number of moles = 0.05 mol
Number of moles of CuSO₄:
Number of moles = mass/molar mass
Number of moles = 3.28 g/ 159.6 g/mol
Number of moles = 0.02 mol
now we will compare the moles of reactant with product.
Al : Al₂ (SO₄)₃
2 : 1
0.05 : 1/2×0.05=0.025 mol
Al : Cu
2 : 3
0.05 : 3/2×0.05 = 0.075 mol
CuSO₄ : Al₂ (SO₄)₃
3 : 1
0.02 : 1/3×0.02=0.007 mol
CuSO₄ : Cu
3 : 3
0.02 : 0.02
Less number of moles of reactants are produced by CuSO₄ thus it will act as limiting reactant.
Two substances in a mixture differ in density and particle size. theses properties can be used to
Answer:
option 1. Two substances in a mixture differ in density and particle size. These properties can be used to separate the substances. These properties can be manipulated in order to have a better separation between the two substances.
Explanation:
Answer:
Two substances in a mixture differ in density and particle size. These properties can be used to separate both of them using the separating funnel or using filtration (filter paper).
Explanation:
Since their densities are different, one substance should float above the other in the mixture which allows for the separating funnel to let the substance sinking below (with the heavier density) to flow out first before changing the beaker to let the lighter substance flow out.
The substance with a bigger particle size would not be able to pass through the filter paper unlike the substance with the smaller particle size as the filter paper's pores is not big enough for it to pass through, separating both substances (with one on the paper and the other outside the filter paper, preferably in the beaker placed below the paper).
What is the huge grouping of stars that rotate around a center of which the Sun and the solar are a part.
IF YOU ARE MR.BEAST FAN ANSWER THIS. What do waves transfer?
A. Mass only
B. Energy only
C. Mass and energy both
Answer:
d
Explanation:
A sound wave involves the movement of energy from one location to another, not the ... TRUE OR FALSE: In order for John to hear Jill, air molecules must move from the ... Ocean waves can only bring energy to the shore; the particles of the medium ... a. mechanical b. electromagnetic c. transverse d. longitudinal. Answer: D
Answer:
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Explanation:
Select all that apply.
Exposure to excessive ultraviolet radiation can be harmful to your _____.
body
skin
breathing
health
Answer:
body skin health
Explanation: