Answer:
Viruses can be seen with a compound light microscope.
Viruses vary greatly in size and structure
Some viruses use the cell's machinery to replicate more viruses
Explanation:
What type of bonding exists between the carbon atoms to create diamond ?
Answer:
Covalent bonds.
Explanation:
Diamond is organized in a giant lattice structure with strong covalent bonds between carbon atoms. Each carbon atom forms 4 bonds. Explanation: Each carbon atom has four electrons in its outer shell, all of which form covalent bonds that are strong and hard to break.
What is Applied chemisrty??
Answer:
Applied Chemistry is the scientific field for understanding basic chemical properties of materials and for producing new materials with well-controlled functions. (:
Answer:
Explanation:
Applied Chemistry is the scientific field for understanding basic chemical properties of materials and for producing new materials with well-controlled functions. (:
In the following image, atoms are represented by colored circles. Different colors represent different
types of atoms. If atoms are touching, they are bonded.
Which of the following boxes shows a mixture of elements and compounds?
A. D
B. C
C. B
D. A
how many molecules are in this formula. 4Mg3P2
Answer:
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Silicon has 2 isotopes, Silicon-28 with an abundance of 90% and Silicon-30 with an abundance of 10%. Find the AAM for Silicon.
Answer:
RAM
[tex]RAM = (mass \: of \: ^{28} Si \: \times \%abundance) + (mass \: of \: ^{30} Si \: \times \%abundance) \\ RAM = (28 \times 90\%) + (30 \times 10\%) \\ RAM = 25.2 + 3 \\ RAM = 28.2[/tex]
PLS I NEED HELP ITS IMPORTANT I AM GIVING 25 POINTS HELP PLEASE. I NEED IT FAST
Why is it important for cells to be able to turn genes on and off? Select ALL Correct reasons!
Question 2 options:
A. so the cell is not too chaotic
B. so the cell can respond to the environment
C. so the cells can grow uncontrollably
D.so the cell does not waste energy
Answer:
B
Explanation: Since you need this quick, its because it needs to respond to the environment. I dont remember the exact term
PLZ HELP!
What would happen to work and power if the mass of the person walking was increased or decreased? EXPLAIN.
Answer:
work and power increases or decreases with the mass
Explanation:
Zn + I2 ---> Znl2
Determine the theoretical yield of the product if 2g of Zn is used
Answer:
Mass = 9.58 g
Explanation:
Given data:
Mass of Zn = 2g
Theoretical yield of ZnI₂ = ?
Solution:
Chemical equation:
Zn + I₂ → ZnI₂
Number of moles of Zn:
Number of moles = mass/molar mass
Number of moles = 2g / 65.38 g/mol
Number of moles = 0.03 mol
Now we will compare the moles of Zn and ZnI₂.
Zn : ZnI₂
1 : 1
0.03 : 0.03
Mass of ZnI₂:
Mass = number of moles × molar mass
Mass = 0.03 mol × 319.22 g/mol
Mass = 9.58 g
Which statement correctly describes soil horizon C?
Answer:
Explanation:
It is the horizon that contains the least humus.
Why are biogeochemical cycles important?
Earth is a closed system. That means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on Earth ( Blank) . So, it is essential that biogeochemical cycles
(Blank) these materials as they move through Earth's subsystems.
Answer:
These cycles are called biogeochemical cycles because they include a variety of biological, geological, and chemical processes. Many elements cycle through ecosystems, organisms, air, water, and soil. ... The biogeochemical cycles transport and store these important elements so that they can be used by living organisms.
A _____________ is formed when water empties into a lake or ocean
Answer:
a delta
Explanation:
he place where a river enters a lake, larger river, or the ocean is called its mouth. River mouths are places of much activity. As a river flows, it picks up sediment from the river bed, eroding banks, and debris on the water. ... When large amounts of alluvium are deposited at the mouth of a river, a delta is formed.
I DoNt CaRe....
BlA BlA BlA BlA
Answer?
Y r u singing?!?
Answer:OKEI
Explanation:im sorry for hatin but hatins what i do.i really need ma points so i can be respected more than u
Is Na3PO3 soluble or insoluble in water and why?
Answer:
Na3Po3 is soluble in water
Sodium phosphite, often referred to as [tex]Na_3PO_3[/tex], is generally considered to be water soluble.
Because the sodium cation (Na+) has a significant affinity for water molecules due to their positive charge, sodium compounds generally have a tendency to be soluble in water. The three sodium ions increase the solubility of [tex]Na_3PO_3[/tex] and make it even more soluble.
The solubility of [tex]Na_3PO_3[/tex] is similarly affected by the phosphate ion [tex](PO^3^-)[/tex]. Phosphates are normally soluble in water unless they are coupled with cations that generate intractable compounds, like some heavy metal ions. The strong ion-dipole interactions between sodium ions and water molecules can be used to explain why [tex]Na_3PO_3[/tex] is soluble in water.
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A different element, , is located in the same row of the periodic table as element , but has roughly half the atomic mass of . Is the atomic radius of less than, equal to, or greater than the atomic radius of ? Justify your answer using principles of atomic structure.
Answer:
It is way too long I can't help with it Honestly
An element in the same row with roughly half of the atomic mass always has a greater atomic radius.
Atomic radius: It is the distance between the nucleus and the outermost shell.
Atomic mass: It is the mass or the number of nucleons or protons and neutrons inside an atom.
In a row, the number of protons increase but the number of shells remains constant.
Hence, the positive protons in the nucleus attract electrons with more electrostatic force.
Therefore, an element in the same row with roughly half of the atomic mass always has a greater atomic radius.
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Which of the following salts has a 3 to 2 ratio of cations to anions?
O Barium Nitride
O Barium sulfide
Barium chloride
O Barium oxide
Explanation:
kind of ion formed (anion or cation) and the size of the ionic charge. ... O-‐2 oxide. S-‐2 sulfide. N-‐3 nitride. P-‐3 phosphide. Table 3.1. Common, simple anions. It is critically important that you distinguish between ...
Ions and Ionic Compounds – Introductory Chemistry – 1st Canadian Edition - BC Open Textbooks
opentextbc.ca › chapter › ions-and-ionic-...
The formula Na 2Cl 2 also has balanced charges, but the convention is to use the lowest ratio of ions, which ... For the ionic compound between magnesium cations (Mg 2+) and oxide anions (O 2−), again we need only ...
[PDF] Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND THE MOLE FORMULAS: A chemical formula shows the elemental composition of a sub
www.eiu.edu › eiuchem › forms › t...
Ba2+ barium. HSO3. – hydrogen sulfite. MnO4. – permanganate. Al3+ aluminum. SO4. 2– sulfate. NO2. – nitrite. Sn2+ tin(II). HSO4. – hydrogen sulfate. NO3. – nitrate. Sn4+ tin(IV). S2O3. 2– thiosulfate. OH– hydroxide.
Symbols and Charges for Monoatomic Ions
www.edu.xunta.es › portal › Nomenclature
Cs+ cesium ion O2- oxide. Be2+ beryllium ion S2- sulfide. Mg2+ magnesium ion Se2- ... one K+ and one Cl¯ are required. The resulting formula is KCl. Example 3: Write the formula from the following name: barium
Barium chloride salts has a 3 to 2 ratio of cations to anions. thus option C is correct.
what are the properties of barium chloride ?Barium Chloride an inorganic salt which is composed up of barium cations (Ba2+) and chloride anions (Cl–), otherwise named as Barium Muriate or Barium dichloride.
It is a white solid , water-soluble, hygroscopic and gives a slight yellow-green color to a flame, extensively used in the industry mainly The sulfate is used in white paints where as Barium chloride is poisonous in nature.
It is soluble in water which dissociate into barium cations and chloride anions in its dissolved state, However, the solubility of this compound in water is temperature-dependent.
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100gm of a 55% (M/M) nitric acid solution is to be diluted to 20% (M/M) nitric acid.
How many liters of water should be added to the starting solution?
Volume of H₂O added = 175 ml
Further explanationGiven
100 gm of a 55% (M/M) and 20% (M/M) nitric acid solution
Required
waters added
Solution
starting solution
mass H₂O = 45%=45 g
%mass of H₂O in new solution = 100%-20%=80%
Can be formulated for %mass H₂O :
[tex]\tt \dfrac{45+x}{100+x}=80\%\\\\45+x=0.8(100+x)\\\\45+x=80+0.8x\\\\35=0.2x\rightarrow x=175~g[/tex]
For water mass=volume(density = 1 g/ml)
So volume added = 175 ml
Which of the following electron configurations correspond to an excited state? Identify the atoms and write the full, ground state electron configuration where appropriate.
1s22s23p1
1s22s2sp6
1s22s22p43s1
[Ar] 4s23d54p1
Electron configurations correspond to an excited state is 1s₂, 2s₂, 3p₁.The electrical configuration 1s₂, 2s₂, 3s₁ demonstrates that the atom is in the excited state.
What is electronic configuration ?The distribution of an atom's or molecule's electrons in atomic or molecular orbitals is known as the electron configuration in atomic physics and quantum chemistry.
An electron is in an excited state when it momentarily possesses an energy level higher than its ground state. If an electron receives more energy, such as when it absorbs a photon, or packet, of light, or collides with an adjacent atom or particle, it can become excited.
The primary distinction between a system's ground state and excited state is that a system's ground state is any condition in which its electrons are at their lowest potential energy levels, whereas an excited state is any state in which they are at an energy greater than the system's ground state.
Thus option A is correct.
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The electron configurations [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex], [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]
corresponds to excited states whereas [tex]1s^2\ 2s^2\ 3p^6[/tex] corresponds to ground state. The correct answer is option 2.
The electron configuration of an atom describes how its electrons are distributed among the various energy levels and orbitals.
The electron configuration [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex] corresponds to an excited state. This configuration indicates that one of the electrons in the 2p orbital has been excited to a higher energy level.The electron configuration [tex]1s^2\ 2s^2\ 3p^6[/tex] is the ground state configuration of the noble gas argon (Ar).The electron configuration [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex]corresponds to an excited state. This configuration indicates that one of the electrons in the 3s orbital has been excited to a higher energy level.The electron configuration [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]corresponds to an excited state. This configuration indicates that one of the electrons in the 4p orbital has been excited to a higher energy level.Therefore, the electron configurations [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex], [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]correspond to excited states, while the electron configuration [tex]1s^2\ 2s^2\ 3p^6[/tex] is the ground state configuration of argon. Option 2 is the correct answer.
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PLEASE ANSWER FAST DUE IN 2 MINUTES
The gas released by animal into the environment is ______
Answer:
Carbon dioxide gas
Explanation:
When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere.
Which molecules is converted directly to acetyl CoA without the intermediate step of being converted first to pyruvate
Answer:
Fatty acids
Explanation:
Acetyl coA is a compound vital for the process of cellular respiration in the mitochondria. It is the starting material of the kreb's cycle or TCA cycle, which takes place in the mitochondria. During the metabolism of glucose (glycolysis), a molecule called PYRUVATE is first synthesized before becoming acetyl coA in the mitochondrion.
However, the metabolism of FATTY ACIDS (monomers of lipids) directly gives rise to acetyl coA without first becoming pyruvate. The fatty acids molecule undergo Beta- oxidation to produce acetyl coA, which enters the TCA cycle to continue cellular respiration.
Please help me!
Will give the brainliest!
Please answer correctly.
Really urgent!!
Explanation:
1,a: I) group 2 = strontium
ii) chlorine
iii) nitrogen
B) i) strontium outer shell=2
ii)nitrogen:outer shell=5
iii) chlorine=7
C)metal
strontium
nickel
molybdenum
cesium
tin
non metal:..
chlorine
nitrogen
neon
An atom has 38 protons and 42 neutrons it is ?
Answer:
The answer is, Strontium
Answer:
Name Molybdenum
Atomic Mass 95.94 atomic mass units
Number of Protons 42
Number of Neutrons 54
Number of Electrons 42
Explanation:
All atoms are positively charged, with the number of protons exceeding the number of electrons. negatively charged, with the number of electrons exceeding the number of protons. neutral, with the number of protons equaling the number of electrons.
Answer:
Yah, it's true.
because protons are represented as helium (²4He) which are positive.
electrons are represented as 0-1e which is negative
Choose all the answers that apply.
Multicellular organisms _____.
are made of more than one cell
are made of only one cell
reproduce by mitosis
have differentiated cells
reproduce through the union of sperm and egg cells
Answer:
a. Are made of more than one cell.
Explanation:
I majored in Chemistry
Answer:
a. Are made of more than one cell.
Explanation:
Why are masks important?
Answer:
It acts as a filter to prevent as much germs, or chemicals/substances, as possible from entering your immune system through your breathing. This is whether you're in a lab or in a grocery store with a pandemic going around. Not only does it protect you but it also protects those around you by filtering any germs you may already have in your system and preventing them from passing on to another person. That is why you should always wear your mask over your mouth and your nose.
Explanation:
Hope this helps. Have a great day. May it be filled with joy and happiness. Please, stay safe and wash your hands.
Which term best describes this reaction? O addition. O Condensation. O elimination. O substitution
Answer:
addition
Explanation:
because you add the two chlorides by breaking the carbon carbon double bond
There is an equal number of protons and __________ in a neutral atom.
A. electrons
B. neutrons
C. protons
D. elements.
the answer is electrons
Why do u wash the residue with distilled water
+20 points! Answer correctly. Wrong or irrelevant answers will be reported. Tysm in advance!
Answer:
To remove impurities
Explanation:
Impurities may react with other chemicals if you are still continuing with the experiment.
Which of the following is most likely to occur due to severe winds during a hurricane?
Answer:
a
Explanation:
Answer:
A
Explanation:
Ethyl alcohol evaporates faster then water, why?
Explanation:
as alcohol evaporates at much faster rate compared with water due to its lower boiling temperature (82 compared to 100 degree Celsius), it is able to carry away more heat from the skin. this means for a given amount of time much more alcohol evaporates than water.
hope it helps you
3.Write the chemical equation for the reaction when methane burns in (2)
(a) Sufficient supply of oxygen
(b) Insufficient supply of oxygen
Answer:
a)CH4 + O2 = CO2 + H2O
b)4CH4+5O=2CO+8H2O+2C