All living organisms falls to either of the prokaryote or eukaryote categories. Thus, the correct option is true.
Living organisms are classified into 2 based on the type of cells they are made of. These are:
Prokaryotes: those whose cells lack nucleus and membrane bound organelles. Examples include bacteria and cyanobacteriaEukaryotes: those whose cells are more complex with nucleus and membrane bound organelles. They include the protists, plants, animals, and fungi.Hence, it is safe to say that prokaryotes and eukaryotes both fall in the category of living things. You have to be living in order to be classified as either.
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What is natural selection help plz help
Answer:
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.
Explanation:
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Answer:
Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
Explanation:
whats the unit for mass
Answer:
The unit for mass is the kilogram (Kg).
Explanation:
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How many grams are in 2.3 moles of O?
Answer:
36.8 g/mol of O
Explanation:
To find the number of grams, multiply the number of moles by the atomic mass of the element.
Oxygen has an atomic mass of 16.00.
2.3 moles O × (16.00 g O ÷ 1 mole) = 36.8 g/mol O
Hope that helps.
Pls help!!! it’s a timed answer
Answer:
Explanation
whats your question
What are redox half-reactions?
Answer:
C. Equations that separate the oxidation and reduction parts of the reaction.
Explanation:
Redox half-reactions are actually used when balancing redox reactions. It gives the oxidation or reduction reaction components/parts of a redox reaction. The change in oxidation and reduction states in the substances that are involved in a redox reaction is used to obtain a redox half-reaction.
This redox half-reaction can also be used to explain what takes place in an electrochemical cell; how the anode is undergoing oxidation and how the cathode is undergoing reduction.
Below is an example of a redox half-reaction:
2 Fe³⁺(aq) + 6e⁻ → 2 Fe(s) (Reduction)
3 Mg(s) → 3 Mg²⁺(aq) + 6e⁻ (Oxidation)
For work to be done on an object:
*
The work input must be equal to the work output
The energy input must be equal to the energy output
Only a force must be applied, moving the object is not required
The object has to move a distance when a force is applied to it
Answer:
The object has to move a distance when a force is applied to it
Explanation:
For work to be done on a body the force applied must move the body through a particular distance.
Work done = Force x distance
If no distance is moved by the force, no work is done.
Also, the angle between the force and the distance must be 0 to do the maximum work on the body.
Star A and star B are the same distance away from earth. From earth, star A seems brighter than star B. Which star has the highest absolute brightness?
Answer:
Star B
Explanation:
Star B, this is because, usually in the discussions about stars, the more luminous star or say, the brighter star usually is the one that possesses the smaller absolute brightness.
That being said, succinctly put, if we have two stars A and star B, if star A is brighter than star B, then star A has a lower absolute brightness. Also, if star B is less brighter than star A, then it has the higher absolute brightness.
Answer:
STAR B
Explanation:
Which element below would most likely gain 3 electrons?
Answer:
Lithium
Explanation:
ScF2 +
KBr ---->
KE +
ScBr2
Balanced equation :
ScF₂ + 2KBr ⇒ 2KF + ScBr₂
Further explanationGiven
Reaction
ScF₂ + KBr ⇒ KF + ScBr₂
Required
Balanced equation
Solution
1. Give coefficient
ScF₂ + aKBr ⇒ bKF + cScBr₂
Sc, left=1, right=c⇒c=1
F, left=2, right=b⇒b=2
K, left=a, right=b⇒a=b⇒a=2
The equation becomes :
ScF₂ + 2KBr ⇒ 2KF + ScBr₂
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?
A The force of the air resistance on the moving hammer
B The force of the person using the hammer
C The force of gravity pulling down on the hammer
D The force of the nail pushing in the opposite direction
Answer:
A
Explanation:
In simple terms: Hammer goes one way, air goes the other way.
Answer:
d
Explanation:
i took the test
Use the following equation to answer question 1-4. Make sure you balance first.
6HCI + Fe2O3 --> 2FeCl3 +3H2O
1. How many moles of water are produced from 10.4 moles of hydrochloric acid?
5.2 mol H₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] 6HCl + Fe₂O₃ → 2FeCl₃ + 3H₂O
[Given] 10.4 mol HCl
Step 2: Identify Conversions
[RxN] 6 mol HCl = 3 mol H₂O
Step 3: Stoichiometry
Set up: [tex]\displaystyle 10.4 \ mol \ HCl(\frac{3 \ mol \ H_2O}{6 \ mol \ HCl})[/tex]Multiply/Divide: [tex]\displaystyle 5.2 \ mol \ H_2O[/tex]Which statement(s) below are correct regarding Rutherford's gold foil experiment? Choose ALL that apply.
a. The atom is mostly empty space
b. The mass and positive charge is concentrated in the center of the atom
c. Atoms contain a nucleus
d. Most alpha particles bounced off of the gold foil
Answer:
A,B,C
Explanation:
White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?
A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. (1) Since it is given that the white gold is having a uniform composition throughout.So,it means this is a Homogeneous mixtures.
Yo can someone help me answer this
Answer:
D
Explanation:
You need both, independant and dependant variables for a hypothesis.
4. How many moles in 2.0 x 1023 atoms of H2O?
here.
Answer:
0.33 moles
Explanation:
to find the number of moles,
moles = number of atoms / avogadro's number ie 6.02 x [tex]10^{23}[/tex]
moles = 2.0 x [tex]10^{23}[/tex] / 6.02 x [tex]10^{23}[/tex]
moles = 0.33 mol
Which statement best describes the density of an atom's nucleus?
A The nucleus occupies most of the atom's volume but contains little of its mass,
The nucleus occupies very little of the ston's volume and contains little of its mass.
The nucleus occupies most of the stom's volume and contains most of its mass
The nucleus occupies very little of the ston's volume but contains most of its mass
Answer:
D. The nucleus occupies very little of the volume but contains most of its mass
Explanation:
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, the nucleus occupies very little of the volume but contains most of its mass. The correct option is option D.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density = Mass of an atom's nucleus ÷volume marked on the graduated cylinder
Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. The nucleus occupies very little of the volume but contains most of its mass.
Therefore, the nucleus occupies very little of the volume but contains most of its mass. The correct option is option D.
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how did leeuwenhoek discover bacteria
Answer:
Antonie van Leeuwenhoek used single-lens microscopes, which he made, to make the first observations of bacteria and protozoa. His extensive research on the growth of small animals such as fleas, mussels, and eels helped disprove the theory of spontaneous generation of life.
Explanation:
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Balance the Chemical Equation
Pb(OH)2 + HCl ---> H2O + PbCl2
Please help
Answer:
Pb(OH)2 + 2 HCl ---> 2H2o + PbCl2
Explanation:
HEEEEELP PLZ
Which conclusion is most logical, based on the data?
Answer:
its the last one
Answer:
D
Explanation:
The total mass of an atom expressed in atomic mass units is known as the *
mass number.
atomic number.
isotopic number.
covalent number.
Answer:
c
Explanation:
The symbol for iron is Fe. The chemical symbol for oxygen is O. The formula for iron oxide, a type of rust is Fe2O3. How many iron atoms are in one molecule of iron oxide? A. 1
B. 2
C. 3
D. 4
17 OT-
2021
Subject Chemistry Date
7 Evaluate and discuss how do you think
the Number of the Valence electrons
relates to con elements Chemical properties
show many Valence election are found
in the following Atoms.
a compound has hydrogen ion and nitrate ion in solutionstate what is the name of that compound
Answer:
This compound is HNO2
Explanation:
HNO2 ----> H+ + NO2
When metals and non metals combine in fixed proportion then a chemical compound is formed So, the compound that will be formed from hydrogen ion and nitrate ion is Hydrogen nitrate.
What is chemical formula?
Chemical formula is a formula where cation and anion combine to form a molecule in fixed proportion. Metals combine in form of cation and non metals combine in form of anion.
Cation is the species that give electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.
Therefore, the compound that will be formed from hydrogen ion and nitrate ion is Hydrogen nitrate.
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for an electron to move from an energy level that was close to the nucleus to an energy level that is far from the nucleus would it need to gain or lose energy ?
Answer:
it would need to lose energy
Explanation:
I don't really have an explanation
As the electrons gets closer to the nucleus, by the electrostatic force of attraction electrons are tightly bound to the nucleus. To move the inner electron to outer shell, high energy have to applied to weaken the nuclear force.
What is nuclear force?Nuclear force is the force by which the nucleon are bind in the nucleus and electrons are attracted towards the nucleus. The positively charged protons inside the nucleus electrostatically attracts the negatively charged electrons.
The minimum amount of energy required to remove an electron from the valence shell by overcoming the nuclear force is called ionization energy.
To bring an electron which is closer to the nucleus to the outer shell needs much energy to reduce the nuclear attractive pull. The energy need to gain.
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according to the Aufbau principle, which principle energy level would have higher energy, n=2 or n=5?
Answer:b
Explanation:
What isotope of carbon is radioactive:
A) Carbon-12
B) Carbon-13
C) Carbon-14
D) Carbon-13 and Carbon-14
How many moles are in 1.204x10^24 atoms of a gas?
Please help!
1.999 mol gas
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
1.204 × 10²⁴ atoms gas
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 1.204 \cdot 10^{24} \ atoms \ gas(\frac{1 \ mol \ gas}{6.022 \cdot 10^{23} \ atoms \ gas})[/tex]Multiply/Divide: [tex]\displaystyle 1.99934 \ moles \ gas[/tex]Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
1.99934 mol gas ≈ 1.999 mol gas
List and describe three types of clouds.
Type here:
Plz hurry
Answer:
Cumulus clouds look like fluffy, white cotton balls in the sky. Since they are so thin, they seldom produce much rain or snow.
Cumulonimbus clouds are menacing looking multi-level clouds, extending high into the sky in towers or plumes. More commonly known as thunderclouds, cumulonimbus is the only cloud type that can produce hail, thunder and lightning.
Nacreous clouds are some of the rarest clouds on the planet. They are a form of polar stratospheric cloud, which is a main culprit in chemical destruction of the ozone layer.
Explanation:
How do ocean currents affect the air temperature of Buenos Aires and Cape Town? this is for science
What is the molar mass of MgI2
Answer:
278.1g/mol
Explanation:
To find the molar mass of the given compound, we must know the atomic mass of the elements within the compound.
Atomic mass of Mg = 24.3g/mol
Atomic mass of I = 126.9g/mol
So;
Molar mass = 24.3 + 2(126.9) = 278.1g/mol
The molar mass of the compound is 278.1g/mol
