Answer: E
Explanation:
Negative ions have ______ (More or Less) protons than electrons.
Answer:
Less
Explanation: I took the test.
Answer: negative ions have less protons than electrons.
Explanation:
In this periodic table, which type of element is shown in green boxes?
A. Noble gases
B. Metalloids
C. Nonmetals
D. Metals
The correct answer is B. Metalloids
Explanation:
In this periodic table, the green boxes include elements such as Boron (B), Arsenic (As), and Antimony (Sb). All these elements are known in chemistry as semimetals or metalloids. This classification is because these elements cannot be completely classified into metals or non-metals. Moreover, they all display similar properties including some level of conductivity, malleability, and solid-state. According to this, the correct answer is B.
Answer:
B. Metalloids
Explanation:
1-Are natural resources renewable or nonrenewable?
2-what is the only way to stop the depletion of natural resources?
3-What is an example of poor soil management?
Answer:
1- Natural sources are renewable with time
2- To refrain from over usage of products on unnecessary things
3- An example of poor soil management is using the soil with the most minerals to put houses on instead of farming with
can somebody help me with this please
Answer:
He, 2, 2, 2, 4, 4-2=2, 1, 8
I, 53, 53, 53, 127, 127-53= 74, 5, 7
Explanation:
um check the periodic table for the rest?
3 way to make bases
Convert 62.5 L to mm
3
Answer:
0.0625
Explanation:
Answer:
62,500
Explanation:
7th grade help me plzzzzzzzz
Answer:
1. Metals
2. Solid, gas, liquid
Explanation:
For #1:
The majority of elements in the periodic table are classified as metals. The transition metals lie in the center of the table, spanning groups three through 12. These elements are solid at room temperature, except mercury, and have the metallic color and malleability expected of metals.
Hope this helps :)
1.) What is the molecular weight of the ketone shown below?
2.)Dry ice sublimes at −78.5 oC at a pressure of 1 atm. At room temperature and 1 atm pressure, what is happening to the dry ice molecules on a molecular level as sublimation occurs?
3.)For the pairs of molecules given below, list the intermolecular forces in each molecule. Also, give the types of electrostatic interactions that could occur between each pair of molecules
cyclohexane and CH2Cl2
CH3CH2OCH2CH3 and CH3CN
Answer:
See explanation
Explanation:
1. The Ketone was not sown in the question but i can give you a general idea of how to calculate its molecular weight. A ketone has a general molecular formula of CnH₂nO.
The molecular weight is calculated knowing that the relative atomic mass of carbon is 12, that of hydrogen is 1 while that of oxygen is 16.
Hence from the general molecular formula, the molecular weight of any ketone is calculated from; n(12) + 2n(1) + 16. Where n represents the number of atoms of each element in the ketone.
2. Sublimation of dry ice occurs when the molecules in dry ice absorb sufficient energy in the form of heat such that they now have enough energy for some molecules to overcome the inter molecular forces acting in the solid crystal and transform directly into the vapor phase. This process is endothermic.
3.
cyclohexane and CH2Cl2 molecules are held together by dispersion forces.
CH3CH2OCH2CH3 and CH3CN are polar molecules held together by dipole-dipole forces.
What is the cost to drive to Los Angeles from San Francisco a distance of 405 miles if the cost of gasoline is $2.90 a gallon and the car get 25 miles per gallon of gas?
Answer: $46.98
Explanation:
The distance to drive to Los Angeles from San Francisco is 405 miles. Since the car get 25 miles per gallon of gas, for 405 miles, the car will use:
= 405/25 = 16.2 gallons
Since the cost of gasoline is $2.90 a gallon and the car will use 16.2 gallons. The cost will be:
= $2.90 × 16.2 gallons
= $46.98
Why did the increase in consumerism occur in the Roaring Twenties?(1 point)
A. There were new technologies and new innovations to drive the sale of goods, since people could afford them.
B. Improvements in technology made life easier for all people.
C. Machines and robots were used on assembly lines, making production more efficient.
D. People were tired of the economy only producing necessary supplies.
Answer:
A. There were new technologies and new innovations to drive the sale of goods, since people could afford them
Explanation:
What might happen if you mixed a strong acid with an equally strong base?
A.You would see an explosive chemical reaction.
B.The acid would destroy the base.
C.The base would destroy the acid.
D.You'd wind up with a pH-neutral salt and water.
Answer:
D
Explanation:
When you mix a strong acid and a strong base : ( D ) You will wind up with a pH-neutral salt and water
The mixture of a strong base and an equally strong acid results in a neutralization reaction, because at the point of equivalence the base and acid will completely neutralize each other.
The mixture solution will have a pH value of 7 and the end products will an ionic salt and water.
Hence we can conclude that When you mix a strong acid and a strong base , you will wind up with a pH-neutral salt and water.
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Can someone pls answer quickly?
answer is atom.Hope it is helpful.
Answer:
Atoms are the smallest particles that made up matter.
Please help me I don’t understand this !!!
Answer:
The real answer for a is-He(helium)4,002602
The answer for b is-Mg(Magnesium) 24.305
239
239
-
93Np
94Pu + c
Answer:4>34.1>56
Explanation:ez
Some things that can be made from coal are...
A. All of the above
B. Tar
C. Generating power
D. Plastics
E. Fertilizer
Answer:A
Explanation:just casuse
What is the V2O5 coefficient??
Answer:
1235
Explanation:
if thers a a guess in that number
The compound V₂O₅ has a Seebeck coefficient at a temperature of 50 °C of -990 μV/K.
What is a compound?Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds .Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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In the following reaction, how many grams of H2O are produced if 2.00 g of N2H4 react? N2H4 + 3 O2 ---> 2NO2 + 2H2O
Answer:
2
Explanation:
From this equation, 2 grams are produced.
The mass of H₂O produced from the reaction is 2.25 g
We'll begin by calculating the mass of N₂H₄ that reacted and the mass of H₂O produced from the balanced equation.
N₂H₄ + 3O₂ —> 2NO₂ + 2H₂O
Molar mass of N₂H₄ = (2×14) +(4×1) = 32 g/mol
Mass of N₂H₄ from the balanced equation = 1 × 32 = 32 g
Molar mass of H₂O = (2×1) + 16 = 18 g/mol
Mass of H₂O from the balanced equation = 2 × 18 = 36 g
SUMMARY
From the balanced equation above,
32 g of N₂H₄ reacted to produce 36 g of H₂O.
Finally, we shall determine the mass of H₂O produced by the reaction of 2 g of N₂H₄From the balanced equation above,
, 32 g of N₂H₄ reacted to produce 36 g of H₂O.
Therefore,
2 g of N₂H₄ will react to produce = (2 × 36) / 32 = 2.25 g of H₂O
Thus, the mass of H₂O produced from the reaction is 2.25 g
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The Synthesis Reaction of aluminum (Al) and iodine (I) forms a new, more complex
product. What is the product?
Answer:
Aluminum iodide (AlI₃)
Explanation:
The synthesis reaction of aluminum (Al) and iodine (I) can be illustrated as shown below:
Aluminium exhibit trivalent positive ion (Al³⁺)
Iodine exhibit univalent negative ion (I¯)
During reaction, there will be an exchange of ion as shown below:
Al³⁺ + I¯ —> AlI₃
Thus, we can write the balanced equation for the reaction as follow:
Al + I₂ —› AlI₃
There are 2 atoms of I on the left side and 3 atoms on the right side. It can be balance by putting 2 in front of AlI₃ and 3 in front of I₂ as shown below:
Al + 3I₂ —› 2AlI₃
There are 2 atoms of Al on the right side and 1 atom on the left side. It can be balance by putting 2 in front of Al as shown below:
2Al + 3I₂ —› 2AlI₃
Thus the equation is balanced.
The product on the reaction is aluminum iodide (AlI₃)
State which statement is a physical change or a chemical change:
(a) Sawing wood
(b) Cooking eggs
(c) Melting chocolate
(d) Chewing sweets
(e) Rusting iron
(f) Filing your fingernails
(g) Milk turning sour
(h) Blow-drying your hair
(i) Boiling water
(j) Baking a cake
(k) Burning a match
Answer:
Physical change: A,C ,D, F, H, I
Chemical Change: B, E, G, J, K
A solid is composed entirely of xenon atoms. What type of solid is it?
a) ionic
b) metallic
c) covalent network
d) atomic
e) molecular
f) amorphous
Answer:
ionic
Explanation:
xenom atoms are too large to move in the crystals without first associating with two oxygen ion vacancies and one uranium ion vacancy
The three types of symbiosis are ___ and ___
Answer:
mutualism,commensalism and parasitism
Answer:
mutualism, commensalism, and parasitism
Which of the following accurately describes metallic bonding?
A. electrons sea of delocalized
B. electrons are shared between atoms
C. electrons are transferred between atoms
D. electrons are released as beta particles
The answer is not C that's all I know. Please answer with explanation if you know.
Answer:
A
Explanation:
points)
(06.01 LC)
Based on the kinetic theory, which statement is true? (4 points)
A
Matter consists of only large molecules.
B
Matter is made up of only charged particles.
C
The particles of matter have zero kinetic energy and potential energy.
D
The particles of matter are arranged in different ways for the different state.
Answer:
D .The particles of matter are arranged in different ways for the different state.
Explanation:
The kinetic molecular theory is used to explain the forces between molecules and the energy the molecules possesses.
One of the key postulate of this theory is that;
The particles of molecules are continual state of motion. They posses kinetic energy. In gas, the particles are random and moves in a straight line motion. Liquids are less random and only slide past one another. Solids have a restricted space and the molecules are free to move about.Therefore, we can see that the particles of matter are arranged in different ways for different state.
n which phase(s) of matter are the atoms closely packed but still able to slide past each other?
gas
liquid
solid and gas
liquid and solid
Answer:
I belive its liquid if I'm right because liquids are packed together when they take shape but they are still able to move.....brainliest???
Answer:
Liquid
Explanation:
Please don't jugde me if I got it wrong
what is electron shielding?
Answer:
Electron shielding is when the inner electrons shield the outer electrons from the full force of the nucleus
Write the chemical formula for gold (I) sulfide.
Answer
Au2s
please mark me as brainlist
Based on the figure below, what do the elements of a group (family) have
in common
Answer:
Explanation:
Send figure below
Lucy learns that the lymphatic system is part of the circulatory system. She wants to learn more about it and reads more carefully about the part it plays in circulation. What is the role of lymph nodes in the lymphatic system?
A. They are found in the plasma and help fight off bacteria and other harmful microorganisms.
B. They filter plasma and return it back to the bloodstream.
C. They filter lymph by trapping harmful bacteria and other microorganisms in the fluid.
D. They transport lymph to where it is needed in the body.
Answer: C because I’m smart
Explanation:
The Lymph nodes have been consisted of the lymph fluid that has been able to entrap the bacteria and kill them. Thus, option C is correct.
Lymph nodes have been defined as the small swellings in the lymphatic system that has been consisting of the various parts of the body.
The lymph nodes have consisted in the neck, armpit, chest and abdominal region of the body and have been able to perform the function as the first layer of defense.
The Lymph nodes have been consisted of the lymph fluid that has been able to entrap the bacteria and kill them. Thus, option C is correct.
For more information about the lymph nodes, refer to the link:
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I need help I know it isnt A
What is the density of an object (g/cm) that has a mass of 2.78 g & a volume of 10.0
cm3?
Answer:
The answer is 0.28 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{2.78}{10} \\ = 0.278[/tex]
We have the final answer as
0.28 g/cm³Hope this helps you
Answer:
p = 0.278 g/cm3
Explanation:
