Answers
2. Halogen
3. Noble gas
4. Metals
5. Metalloids
6. Non metal
Related Questions
A car travels 65 miles in 1 hour. What is the average speed of the car?
Answers
A beaker containing 6.32 moles of PBr3, contains___
molecules of PBrz.
A) 1712.7
B) 3.1 x 10^24
C) 3.8 x 10^24
D) 271
Answers
Answer:
3.8 x 10²⁴molecules
Explanation:
Given parameters:
Number of moles = 6.32moles
Unknown:
Number of molecules = ?
Solution:
The number of moles can be used to derive the number of molecules found within a substance.
Now,
1 mole of substance contains 6.02 x 10²³ molecules
6.32 mole of PBr₃ will contain 6.32 x 6.02 x 10²³ = 3.8 x 10²⁴molecules
What is the name of the following chemical compound?
Answers
Answer:
Iron(II) oxide
Explanation:
Iron(II) oxide or ferrous oxide is the inorganic compound with the formula FeO. Its mineral form is known as wüstite.
Could a person at the South Pole see the North Star? Explain.
Answers
Answer:
Yes
Explanation:
Because yes
Answer:
Yes, North is a direction and the south pole is a place so yes you can see the north star from the south pole
Explanation:
What is the total number of electrons in an atom of an element with an atomic number of 18 and a mass number
of 40?
a. 58
c. 22
b. 18
d. 40
Answers
Answer:
18
Explanation:
In neutral atom protons and electrons are equal in number as it atomic number or proton number is 18 so electrons are also 18
The total number of electrons in an atom of an element with an atomic number of 18 and a mass number of 40 is 18.
What are the difference between atomic number and atomic mass ?Atomic mass can be defined as the total number of neutrons and protons located in nucleus of an element while atomic number is the number of protons present in the nucleus of element.
Atomic mass can be defined as the average weight of an element where as the atomic number is the total number of protons present in the nucleus; Atomic mass have the symbol A while atomic number have the symbol the letter Z.
Different isotopes of an element are differentiated by atomic mass is while isotopes share the same atomic number, in neutral atom protons and electrons are equal to atomic number or proton number is 18 and electrons are also 18
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The
the surface area of the reactants, the faster the reaction rate.
A. greater
B. lesser
Answers
hope this helps!!
Which best explains the difference between a monomer and a polymer?
A monomer is larger than a polymer.
A monomer contains carbon and a polymer does not.
A polymer contains carbon and a monomer does not.
A polymer is larger than a monomer.
Answers
The difference between the monomer and a polymer should be that monomer should be larger than a polymer.
Difference of monomer and a polymer?The monomer represent the molecule type where it has the capability for chemically the bond along with the other molecules with respect to the long chain. While the polymer should represent the chain of the non-specified the no of monomers.
Also, it represent the building blocks of polymers that contain more complex type of molecules
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Answer:
A
Explanation:
a compared of magnesium nitric contains 72% of magnesium and 28% of nitrogen. what is the empirical formula of magnesium nitric.
and the answer is Mg 3 N 2
how to do the solution.
Answers
The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components
The principle of determining empirical formula
• Determine the mass ratio of the constituent elements of the compound.
• Determine the mole ratio by dividing the percentage by the atomic mass
The empirical formula :
mol ratio Mg : N ⇒
[tex]\tt =\dfrac{72}{24~g/mol}\div \dfrac{28}{14~g/mol}\\\\=3\div 2\rightarrow Mg_3N_2[/tex]
Which measurement is a vector?
Answers
Which sentence best explains the relationship between pressure and the
solubility of a gas?
A. The greater the pressure, the more gas that will dissolve.
B. Solubility increases with pressure for some gases but not others.
C. The lower the pressure, the more gas that will dissolve.
D. Pressure has no effect on the solubility of gases.
Answers
Answer: A. The greater the pressure, the more of gas that will dissolve.
Explanation: Increasing pressure increases the solubility of gases. It has little effect on the solubility of liquids and solids.
Which of the following has the larger atomic radius?
O Cs
O Ca
O Li
O Ba
Answers
Hope it helps
What is an example for "chemical equations"?
Answers
Answer:
A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.
Explanation:
QUESTION 10
Which of the following is not a characteristic of ionic compounds?
A. Contains metals and non metals
B. Ions form a crystal structure
C. Conducts electricity in the solid state
D. High melting point
Answers
Answer: C. Conducts electricity in the solid state
Explanation:
Hair is composed of a protein called cellulose
O
True
O False
Answers
Answer:True
Explanation:
Iv done this before
Make
a claim about why cells need ribosomes.
Summarize evidence to support the claim
and explain your reasoning.
ls?
Answers
how does atomic radius affect coulombic attraction?
Answers
What is the subscript of 3MgC12
Answers
A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have?
13
5
9
4
Answers
Answer:
It has 5 neutrons
Explanation:
The fact that it is a neutral atom tells us that the number of electrons and protons is the same:
The problem tells us there are 4 electrons, thus there are 4 protons.The average mass of an atom is the sum of the number of protons and the number of neutrons:
Mass = # Protons + # NeutronsWith the above information in mind we can calculate the number of neutrons:
9 amu = 4 Protons + # Neutrons# Neurons = 5 Neutronshow much heat is absorbed when 15.0 g of liquid water is heated until the temperature increases by 16.0.
Answers
How much oxygen (O) is in 5.41 × 106 atoms of oxygen
Answers
Answer:
They show you how to do it sweetie
Explanation:
123456789 Common math
The cause of the phases of the moon Is a cycle that is close to - long
Answers
Answer: 28 days.
Hope this helps...... Stay safe and have a Merry Christmas!!!!!!!!! :D
is bird seed homogeneous or heterogeneous
Answers
Answer:
heterogeneous
In order to give birds a varied and balanced diet, commercial bird seed blends typically include a range of seeds, grains, and other substances. As a result, bird seed is frequently categorised as a heterogeneous blend.
A seed is referred to as homogenous if its genetic makeup, size, shape, and other traits are all consistent. To guarantee consistency in the ensuing plants, these seeds are typically created through controlled breeding or genetic manipulation. A heterogeneous seed, on the other hand, is one that varies in genetic makeup, size, shape, and attributes. These seeds frequently result from cross-pollination or natural pollination between various species or kinds.
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What separates the inner planets from the outer planets in our solar system?
()Comet Belt
()Asteroid Belt
()Their differences
()Distance
Help plss!!
Answers
Answer:
the answer is B Astroid Belt
What is the percentage composition of each element in carbon dioxide, CO2? Remember percent composition is based on mass. (Show your calculations for full credit.)
Answers
%C = 27.3%
%O=72.7%
Further explanationProust states the Comparative Law that compounds are formed from elements with the same Mass Comparison, so that compounds have a fixed composition of elements
The empirical formula is the mole ratio of compounds forming elements.
MW CO₂ : 44 g/mol
Ar C = 12 g/mol
Ar O = 16
%C[tex]\tt \dfrac{12}{44}\times 100\%=27.3\%[/tex]
%O[tex]\tt \dfrac{2.16}{44}\times 100\%=72.7\%[/tex]
All of the alkaline earth metals are similar in that – they are all artificially made elements they all have similar atomic weights. they all have the same ionic charge. they all show variable valences.
Answers
Answer:
they all have the same ionic charge.
Explanation:
Alkaline earth metals are group 2 metals on the periodic table. They are divalent elements because they have two valence electrons and ionize by donating these two valence electrons. Elements in this group have the same numbers of electrons in their outermost shell of their atoms. i.e. they all have the same number of valence electrons and ionic charge.
I need to someone to explain the whole being of Chemistry. I do not understand a single thing, nothing makes sense to me. Literally, I'm going to fail this class because I do NOT understand a single thing taught to me. Maybe it's because I was mistakenly put into Chemistry Pre AP instead of on level but it's so hard and- I just do not get it.
Answers
Answer:
Explanation:
In Pre-AP Chemistry, the development of models to explain their macroscopic observations is a primary means through which students develop an understanding of the molecular world.
You will be forced to think and apply concepts to new situations, and even derive your own theories from application. This is excellent preparation for the higher levels of thinking required in college.
Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.
What is the name of the following chemical compound?
Answers
Answer:
Lead(IV) iodide
Explanation:
Answer:
Plasmid #50548
Explanation:
By examining the diagram, which of the following is NOT needed for photosynthesis:
O sunlight
O carbon dioxide
O water
oxygen
Answers
The formula is carbon dioxide + water + sunlight = oxygen + glucose
Therefore, you don’t need oxygen as it’s a product
*please be serious *
What is one way active transport is different from diffusion ?
Answers
Answer:
Explanation:
During active transport, molecules move from an area of low concentration to an area of high concentration. This is the opposite of diffusion, and these molecules are said to flow against their concentration gradient.
Carbon tetrafluoride, CF, contains four identical C-F bonds. Fluorine is more
electronegative than carbon. How will this impact each of the bonds between carbon and
fluorine?
a. The electrons in each C-F bond will be more attracted to the carbon atom.
b. The electrons in each C-F bond will be attracted equally to both atoms.
C. The electrons in each C-F bond will be more attracted to the fluorine atom.
d. The electrons in each C-F bond will separate easily.
Answers
Answer:
C. The electrons in each C-F bond will be more attracted to the fluorine atom.