Answer:
There's no graph attached to the question
Which electromagnetic wave has the longest
wavelength? Describe the energy level and
frequency of this wave.
Answer:
radio waves
Explanation:
which has the longest wavelength and lowest frequency and energy. Ultraviolet light (UV) is divided into three regions: UV A, wavelength = 400 - 320 nm UV B, wavelength = 320 - 280 nm
What experiment did J. J. Thomson do?
A. He sent a cathode ray between electrically charged metal plates.
B. He suspended charged oil drops in a chamber.
C. He hit metal plates with light.
D. He shot alpha particles through gold foil
Answer:
A. He sent a cathode ray between electrically charged metal plates
hey y’all, I’m growing a plant for science class but I need some questions about the plant, can someone please give me atleast 3 questions to answer for it.. can you give me atleast one tricky one
Hurry pls <3
Answer:
What type of plant
Where is it mainly found
What are some facts about it?
What’s the answer for this question
Answer:
i think it's B
Explanation:
1. Which of the following statements is true about seeds?
a. Every plant produces seeds.
c. All seeds are good to eat.
b. All fruits contain many of seeds. d. all seeds has young plant, stored food and a seed coat.
2. Flowers cannot usually produce seeds unless
a. they are visited by insects.
c. they produce nectar.
b. they are on plants growing in good soil. d. the right pollen is placed on their stigmas.
3. Fertilization take place before a seed develops. Which statement describes when fertilization
occurs?
a pollen grain falls on a pistil
c. sperm in a pollen joins with an egg cell in an ovule
b. a pollen tube enters an ovary
d. an ovary becomes a fruit
4. Which of the following is NOT a factor needed by plants?
a. fire
b. nutrients
Please pasagot po ng tanong ko please
c. sunlight
d. water
5. Which is the reproduction in plants where the male and female parts of the flower are involved?
a. asexual
b. sexual
c. rhizome
d. pollination
Answer:
1 ans: d. all seeds has young plant, stored food and a seed coat.
2 ans: d. the right pollen is placed on their stigmas
3 ans: a. pollen grain falls on a pistil
4 ans: a. fire
5 ans: b. sexual
Hope it helps,
Please mark me as brainliest
Thank you...
Balance the folowing equation.
S + 02
ws
SO:
Answer:
s+o2=so2
Explanation:
i hope it will help u
What is the main process by which water moves from land to the atmosphere?
Answer:
isn't that evaporation if not you can just delete my answer-
Explanation:
1.
what can noble gases be used for?
2.
what is a vertical column called in the periodic table
3.
what is the horizontal column in the periodic table
Answer:
1. They are mostly used to protect materials and prevent chemical reactions.
2.These are Groups
3. I guess it is Rows
Which of the following might be included in a chemical
reaction?
a
Molecules
blons
Pure elements
d
All of the above
Answer:
b) ions
Explanation:
Answer: all of the above
Explanation:
A skateboarder coasts a distance of 20 meters in 4 seconds. What is the person's speed?
Answer:
5
Explanation:
20/4
23) What is the chemical formula for carbon dioxide?
A CO2
B C2O
C CO2
D 2CO
When a gas is heated, the gas particles have more kinetic energy. Complete the following sentence: This means they move about more and have more ______ with the sides of the container. This increases the pressure.
Answer:
Contact
Explanation:
As the speed of the particles increases, they move around more, which means they hit the sides of the container more.
What is the half-life of Technetium-99 if a 200 gram sample decays to 50 grams in 639,000 years?
Answer:
The half-life of Th-232 is 1.4 ∙ 10¹⁰ years.
The reaction represented by this graph is an exothermic reaction. According to the graph, which statement is true? Reactants have more energy than products. Products have more energy than reactants. Reactants and products have the same amount of energy.
Answer:
Reactants have more energy than products
Explanation:
Generally, in an exothermic reaction heat is released. In other words, energy is released. So you start with reactants which have a set amount of stored chemical energy, and you lose some in the reaction. Since energy is 'leaving', the stored chemical energy in the products is less than what we started with in the reactants. When given a graph, you can tell this is true because going from left to right, the line representing the stored chemical energy will start at a higher level than where it ends.
The true statement about an exothermic reaction is that reactants have more energy than products.
What is an exothermic reaction?An exothermic reaction is one in which the energy of reactants is greater than that of products. As such, energy is given off during the reaction in form of heat.
Thus, the true statement about an exothermic reaction is that reactants have more energy than products.
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R4te me for 10 points and be honest with me PLEASE
Answer:
id give you and 8 or 9 but you are really pretty tho
Explanation:
In order to become a chemically stable ion, a neutral atom of sodium will _______.
A. lose one electron
B. lose two electrons
C. gain two electrons
D. gain one electron
Answer:
D. gain one electron
Explanation:
In order to become a chemically stable ion, a neutral atom of sodium will gain one electron. Therefore, the correct option is option D.
What is chemical stability?Chemical stability in chemistry refers to a chemical system's thermodynamic stability. When a system reaches its lowest energy state or in thermodynamic equilibrium with its surroundings, thermodynamic stability occurs.
It could be a spontaneous process when the total number of atoms or molecules in a given shape is conserved despite the fact that individual particles or atoms change forms. In order to become a chemically stable ion, a neutral atom of sodium will gain one electron.
Therefore, the correct option is option D.
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1. Which type of matter has the molecules packed closer together?
a. Solid
b. Liquid
c. Gas
d. Plasma
2. Matter is made up of __________.
a. Molecules
b. Particles
c. Atom
d. All of them
3. Particles with more energy move ________ than particles with less
energy.
a. Slower and closer together
b. Slower and farther apart
c. Faster and farther apart
d. Faster and closer together
4. Which best describes the particles in a liquid?
a. More freely moving than a gas
b. More freely moving than a
solid
c. Less freely moving than a
solid
d. Completely unmoving
5. Which of the following statements describes a mass?
a. The force of attraction between two bodies.
b. The force of gravity exerts on a body of mass.
c. The amount of matter in an object.
d. The weight of the object from place to place.
Answer:
1. Which type of matter has the molecules packed closer together?
a. Solid
2. Matter is made up of _________.
d. All of them
3. Particles with more energy move ________ than particles with less
energy.
c. Faster and farther apart
4. Which best describes the particles in a liquid?
b. More freely moving than a solid
5. Which of the following statements describes a mass?
c. The amount of matter in an object.
what’s the difference between 2o and o(subscript 2)?
Answer:
2O is an atom while O2 Is a molecule
A prokaryotic cell does not have
А
a cell membrane.
B
genetic material.
C
a nucleus.
D
flagella.
Answer:
D
Explanation:
An atom that has lost one or more electrons is a(n) _____.
Not Cation
Answer:
ion
Explanation:
that is the definition according to g o o g l e:
"an atom or molecule with a net electric charge due to the loss or gain of one or more electrons."
Answer:
An ION
Explanation:
Because a positive ion is called a CATION and a negative ion is called an ANION (Please brainlist me)
please help quick the 6th question is “What is a catalyst?” (include all three parts)
What is the net ionic equation for this reaction?
FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl
Answer:
2.6299
its easy
Electrons can occur only in specific
Answer: Electrons have wavelike motion and are restricted to certain energy states associated with specific wavelengths.
What is it about the structure of magnesium atoms that makes them react more slowly than sodium atoms?
Answer:
A reactive metal has the ability to easily lose an electron and acquire a positive charge. Sodium easily loses electrons and acquires a positive charge. Sodium easily lose electrons than magnesium and get oxidized to easily.
Explanation:
What is the noble gas configuration for zirconium?
Answer:
[Kr] 4d² 5s² option b will be correct answer
How many moles of potassium are needed to react completely with 7.50 mol of chromium (III) oxide? Show work.
Answer:
45 mol
Explanation:
First you need to balance the equation:
6K + Cr2O3 = 3K2O + 2Cr
the proportion of the coeficients of potassium and chromium oxide is 6 to 1 so we need to multiply 7.5 by 6 to get 45.
Balance the equation Ag2O ->Ag + O2
Answer:
For balancing this equation
we need to put
Ag2O. = 2
Ag = 4
O2 = 1
Hope it will help
The balanced chemical equation of decomposition of silver oxide is 2 Ag₂O -> 4 Ag + O₂.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Elaborate on the nuclear model of the atom. The nuclear model describes the atom as protons and neutrons distributed throughout a sea of electrons. The nuclear model describes the atom as electrons uniformly scattered in a positive cloud of protons. Eliminate The nuclear model describes the atom as a small, negative center enveloped by a cloud of positive particles. The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.
Answer:
D.) The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.
Answer
The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.
well i just had a major PTSD attack how is everyone i need to think about something else
Answer:
Oh so so sorry about that. and thanks for caring for us. anyway we are good wbu
Explanation:
im good. i just ate applesauce lol :)
The empirical formulae of a compound is CH2O. The relative formula mass for the molecular formula is 180. What is the molecular formula?
Answer:
ch20 is the empirical formula for glucose , c6h1206 is the molecular formula .