Answer: .132
Explanation:
Which is a characteristic of diatoms?
whip-like tail
heterotrophic
multicellular
glass-like cell wall
Answer:
Glass-like cell wall
Explanation:
No tail, autotrophs, and single-cellular. Cell walls are transparent, do D is correct.
Answer:
glass-like cell wall, the guy above is right
Explanation:
took the test :)
Identify the number of valence electrons in each atom:
a. Calcium
b. Carbon
c. Sulfur
Answer:
-Sulfur is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S₈. Elemental sulfur is a bright yellow, crystalline solid at room temperature.
(Atomic number: 16
Electron configuration: [Ne] 3s²3p⁴
Electrons per shell: 2,8,6
Electronegativity: 2.58)
-Calcium is the 20th element, with 20 protons. Since a stable atom has a net charge of 0, we must have 20 electrons.
-Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust.
(Symbol: C
Atomic mass: 12.0107 u
Atomic number: 6
Electrons per shell: 2, 4
Electron configuration: [He] 2s22p2
Electronegativity: 2.55)
According to the electronic configuration, number of valence electrons in each atom of calcium,carbon and sulfur is 2, 4 and 6 respectively.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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How are mixtures and solutions different from each other?
A. there are no differences
B. one combiner chemically the other combines electronically
C. They have more than one element in them
D. the mixture can be separated and the solution is not easily separated
The sediments along the side of this stream are an example of _________
Answer:
deposition of the slip off slope
24. In our experiment, we filled 4 tubes with water and bromothymol blue.
Tube 1 did not contain an organisms, tube 2 contained a snail, tube 3
contained a elodea and tube 4 contained both a snail and elodea. What
tubes could photosynthesis occur in?
O Tubes 3 and 4
O Tubes 2 and 4
O Tubes 2, 3, and 4
Answer:
C. Tubes 2, 3, and 4
Explanation:
Tube one doesn't contain an organism so it can't be that one.
Both a snail and an elodea are considered an organism, cellular respiration occurs in almost any organism's cells.
good luck, i hope this helps :)
Electrons, protons and which other sub-atomic particle were discovered in the 19th and early 20th century?
Answer: The electron, discovered in 1897 by J. J. Thomson, was the first subatomic particle to be observed. The nucleus of ordinary hydrogen was understood to be a single proton after the nucleus of the atom was discovered in 1911 by Ernest Rutherford. In 1932, a neutron was detected.
what is the physical property to all of these (pls answer I’ll give brainliest)
Ability of an object to break apart or shatter easily.
Either transparent (clear), translucent (cloudy), or opaque (not allowing light through).
eg. red, orange, blue, ...
Amount of mass per unit volume of that matter.
Ability to be stretched into a long wire-like shape.
Definite geometric pattern.
Determined by the resistance to being scratched, given on a scale of 1-10 with a diamond being rated a 10.
Ability of an object to reflect light (eg. shiny).
Ability of a substance to be hammered or bent into different shapes.
The temperature when a solid melts.
eg. burnt, flowery
Ability of a substance (solute) to dissolve in a solvent such as water.
Condition of being a solid, liquid, or gas.
eg. sweet, sour, salty, bitter,.
The "feel" of an object (eg. silky, waxy, gritty,...)
The resistance of a liquid to flowing.
Answer:
Explanation:
Brittleness : The ability of an object to break apart or shatter easily
Ductility: The ability of a substance to be stretched out into a long wire-like shape.
Lustre: the ability of an object to reflect light.
Malleability is a substance's ability to deform under pressure
The melting point of ice is 0°C. The melting point of a solid is the same as the freezing point of the liquid
Solubility is the relative ability of a solute to dissolve into a solvent.
solid: Has a definite shape and volume.
liquid: Has a definite volume, but take the shape of the container.
gas: Has no definite shape or volume. change of state
The resistance of a liquid to flowing is its viscosity.
Let me Know if i missed somethin!!! :) Hope this Helped!!!
Answer:
1.Brittleness
2.Clarity
3.Color
4.How dense it is
5.Ductility
6.Crystalline
7.Hardness
8.Reflectivity
9.Malleability
10.Melting Point
11.Smell
12.Solubility
13.State of Matter
14.Taste
15.Texture
16.Viscosity
How many molecules are in 7V205?
Answer:
Calculate the number of moles you have by taking the Mass / molar mass. if you have 1000 grams ; then 1,000 g / 151.001 g/mol = X g moles. Then multiply by Avogadros # = 6.022140857 × 10^23 molecules per g mole. The result is the # of molecules of MnSO4
Explanation: Hope this helps
The ____________________ contain chlorophyll and make food from light energy.
Answer:
chloroplasts
Explanation:
Answer:
photosynthesis (i am not sure of answer choces, but this is the answer
Explanation:
Green plants have the ability to make their own food. They do this through a process called photosynthesis, which uses a green pigment called chlorophyll. ... Chlorophyll's job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. I also remember this from Science.
PLZ TELL ME IF RIGHT, 5 STAR AND BRAINLEST ONLY IF RIGHT
This equation represents cellular respiration.
C6H12O6 +602
6 CO2 + 6H2O + energy
Which table lists all the atoms in reactants and products of cellular respiration?
Reactants 6 C 12 H 18 O
ΟΑ.
Products 6 C 12 H 18 O
Reactants 6 C 6H 2
Ов.
Products 6 C 12 H 120
Reactants 6 C 12 H 120
C.
Products 6 C 12 H 30
Reactants 6 C 12 H 18 0
D.
Products 1C6H 18 O
Please hurry
if you work it put you will get the 3rd one I think
I didn't really understand the explanation, can it be broken down
Answer:
40.06
Explanation:
(23 * 39) + (48 * 40) + (29 * 41)
100
= 40.06
formula:
(% of isotope A * mass of A) + (% of isotope B * mass of B) ......
100
Answer:
yes it can be broken down
Type the correct answer in each box.
Complete the chemical formula for each ionic compound. Consult the periodic table to help you answer the question.
magnesium nitride: Mg___N___
calcium chloride: CaCl____
Answer:
mg3n2 and cacl3 hope it helps
what is the percent of aluminum found in Al2SO4
Answer:
15.772%
Explanation:
The nucleus of the eukaryotic cell is important because it
A. Controls the passing of substances through the cell membrane
B. Its rigidity controls the passing of substances through the cell wall
C. Contains DNA and controls the cell
For this question I think the answer is C.
It is the location of a cell's DNA
Which means it controls the cells
What is the most important organ in the Nervous System and why?
Answer: More than likely it is the brain. Since this is the center for all nerves and it controls the whole body.
Can someone help me thx asap
Answer:
solvent
Explanation:
the solvent is usually a liquid substance
how do you know the simulation is depicting a decomposition reaction
Answer:
1.A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B.
Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.
35 Before the discovery of oxygen some scientists had a different theory about burning.
What did they believe was present in all substances that burned?
A air
B hydrogen
C phlogiston
D reactivity
Answer:
B i have to search it like 23 hours to find it but Thank you for sharing your question :)A property is a characteristic that can be used to identify a substance. Properties can be ______ or _______.
Answer:
a list of characteristics that can be used to identify a substance include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
Answer:
physical or chemical
Explanation:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance while a chemical property describes the ability of a substance to undergo a specific chemical change.
Which of the following is TRUE of all bases?
Answer:
y
Explanation:
k
PRACTICE PROBLEM 3
Return to
choice
board
1C3H8+502 3C02 +4 H2O
What mass of O, is needed to react with 48.05 g C3H8?
Answer:
Explanation:
?
find the name for this W(C2H3O2)4
The name for this W(C2H3O2)4 is the chemical formula for lead(IV) acetate, often known as lead tetraacetate, is Pb(C2H3O2)4.
What is chemical formula?Chemical formula is defined as any of a number of ways to describe the structure or content of chemical substances. The chemical formula is a way of expressing information about the atomic proportions that make up a certain chemical compound or molecule using the numbers and symbols of the chemical elements. The sorts of atoms and their numbers in a molecule or compound are described using chemical formulae. Each element's atoms are denoted by one or two distinct letters.
It is not a salt because it is a colorless solid that dissolves in nonpolar, organic liquids. Moisture causes it to break down, therefore acetic acid is usually added when storing it. The substance is utilized to create organic compounds.
Thus, the name for this W(C2H3O2)4 is the chemical formula for lead(IV) acetate, often known as lead tetraacetate, is Pb(C2H3O2)4.
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1. What is solar energy? Give an example
Answer:
Solar energy is energy from the sun. for example solar panels are used to use energy for the sun to give you eletricity.
Explanation:
Explanation:
solar energy is energy from the sun, it can be used for electricity.
Janice wants to grow flowers in her backyard. She has four types of dirt that she could use, but she is unsure of which type would allow the flowers to grow the best. In order to figure this out, she sets up an investigation. Janice puts each type of soil in a different pot and plants a flower in each pot. What scientific question should Janice ask from her experiment?
A.
Which soil looks the best?
B.
Which soil type allows the flower to grow the most?
C.
Which soil is the oldest?
D.
Which soil type is preferred by most people?
Answer:
B
Explanation:
She is unsure of which soil would allow the flowers to grow best so the soil that allows the flower to grow the most is the best soil.
Answer:
B. which soil type allows the flower to grow the most?
who likes chicken nuggets
Answer:
me especially the dino ones
Explanation:
Match the general form of each reaction to it’s appropriate chenille reaction.
In photo
The pressure inside of a tire is measured as
3.2 atm. What is this pressure in psi? Explain
the steps that you took to solve this problem.
Answer:
Aksjisssjsjszjsusshisbzjsvssjsh
(a) Give the H-C-O bond angle in methyl formate H-C-O bond angle methyl formate
(b) One dihedral angle in methyl formate relates the plane containing the O-C- O bonds to the plane y two structures of methyl formate: one in which this dihedral angle containing the Co-onds, identand the other in which it is 180 0° dihedral angle 80" dihedral angle.
Answer:
Explanation:
The bond angle is said to be the angle between two atoms near or around the same atom for a given covalent compound. However, a dihedral angle is known as the angle formed between two planes. Bond angles are usually planar while dihedral angles are interplanar.
The diagram below shows the structure of each compound.
Reptiles, birds, and mammals reproduce by what type of
fertilization?
The correct answer is Internal
Internal Fertilization
What is the formula for Aluminum iodate?
Answer:
the formula is AlI3