Answer:
When an electron temporarily occupies an energy state greater than its ground state, it is in an excited state. An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet of light, or collides with a nearby atom or particle.
Explanation:
Hope this helps.
Have a good night ma´am/sir.
Be safe!
Aspirin is not as____
in water as sugar is.
Answer:Soluble
Explanation:Soluble:(of a substance) able to be dissolved, especially in water.
Which of the following could not be responsible for the acceleration of an object?
wind
gravity
density
friction
Answer:
i believe its friction
Explanation:
friction slows down objects
Which of the following is an example of a buoyant force acting on a piece of
bread?
O A. The piece of bread floats on the surface of a lake.
B. The piece of bread travels in uniform circular motion.
C. The piece of bread remains still despite an applied force.
D. The piece of bread travels with straight-line horizontal
acceleration.
An example of the buoyant force on a piece of bread is the piece of bread floats on the surface of body water such as a lake.
What is the buoyant force?This is a force experienced by objects when they are in a body of water. This force implies objects have an upward force, which in many cases causes them to float.
What are some examples of this force?Any object that is submerged in water but floats or shows to have an upward force is an example of this force. Based on this, the option that clearly shows the buoyant force is a bread floating on a lake.
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Answer:
A
Explanation:
A conclusion in science states whether or not a hypothesis is correct
or not?
Answer:it do not states
Explanation:
which of the following is NOT a characteristic of minerals
A. Occur in gaseous and liquid state
B. Formed by inorganic processes
C. naturally occurring
D. definite chemical composition
Answer:
A. Occur in gaseous and liquid state
Explanation:
The choice that is not a characteristic of minerals is that minerals occur in gaseous and liquid state.
All minerals are solid inorganic compounds.
A mineral is an inorganic compound that is formed naturally. They have a definite and specific chemical composition. Minerals are the building blocks of rocks. When minerals aggregates together, they form different rock types. There is no known mineral that is in fluid state. All minerals are solids. Examples are quartz, kaolinite, gypsum e.t.cParticles in a warmer block will have ________ kinetic energy and move ______than the particles in the colder block.
Question options:
more/faster
less/slower
less/faster
more/slower
Answer:
More and Faster
Particles in a warmer block will have more kinetic energy and move faster than the particles in the colder block.
What is kinetic energy?
Kinetic energy is defined as a form of energy that an object or particle has by the reason of its movement.
It is also defined as the measure of the work that an object does by the virtue of its motion.
Kinetic energy can be expressed as
KE = 1/2mv²
Kinetic energy is produced when potential energy is released, triggered into motion by gravity, or chemical reaction among other crystals.
Thus, particles in a warmer block will have more kinetic energy and move faster than the particles in the colder block.
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2.54 mL of ethanol to mol ethanol (Hint: the density of ethanol is 0.789
g/mL.)
0.04350179862
Explanation:
Make sure to check for sig figs though. Basically, you have 2.54 mL and you multiply that by the 0.789 g/mL and mL cancels out and you are left with 2.00406g. There are 46.06844 grams per mol of ethanol, so to cancel out grams we multiply by 1/46.06844. And then we are left with 0.04350179862 mol
Earth is a single interconnected system. True False
Answer:
True
Explanation:
Earth is a single interconnected system but it can be subdivided into smaller systems.
moves.
whats the meaning
Speed ?
and the
meaning of
of Motion?
Hurry I have 15 minutes please help
Answer:
Speed: The rate at which someone or something is able to move or operate. Motion: The action or process of moving or being moved.
Explanation:
I pretty much explained it in the answer, have a good one!
Pls Sub to my channel: it's at YT, /channel/, then UCHgDIEsCCSJlYN3Kg2LOgow?
Will IO- and NaOH form a buffer?
Answer:
this is the answer for will NaOH be a buffer
Explanation:
The compound CH 3NH 3Cl is a salt made from that weak base, so the combination of these two solutes would make a buffer solution. NH 3 is a weak base, but NaOH is a strong base. The combination of these two solutes would not make a buffer solution
X-ray crystallography is used to see the structure of molecules. Scientists have used this technique to find the structure of cholesterol, an important biological molecule.
Knowledge of the structure of cholesterol is helpful because it may affect
A. how cholesterol works in the body.
B. the amount of cholesterol that is considered healthy.
C. previous ideas about which foods contain cholesterol.
D. previous explanations of how cholesterol works in the body.
Answer:
A. how cholesterol works in the body.
Explanation:
If we know the precise structure of a molecule (by X-ray crystallography), we can understand more about how it interacts with cells, proteins, and other molecules. It can also tell us what reactions it might take part in.
Therefore, we can learn more about how it works in the body and what activities it takes part in in the cells of the body.
Answer:
A
Explanation:
nuityyy
HURRY PLEASE HELP!! The combustion of methane begins with 1 carbon atom and 4 hydrogen atoms in the compound CH4 How many hydrogen atoms will be
found as a product?
A. 3
B. 4
C. 1
D. 2
Answer:
B, 4.
Explanation:
i just took this
What reagent is
used to test for starch
Answer:
iodine
Explanation:
In the presence of starch, iodine turns a blue/black colour. It is possible to distinguish starch from glucose (and other carbohydrates) using this iodine solution test. For example, if iodine is added to a peeled potato then it will turn black. Benedict's reagent can be used to test for glucose.
You have three mugs of tea:
a. Is a small mug. It is 100°F
b. Is a large mug. It is 120°F
c. Is a small mug. It is 120°F
Put these mugs in order. Start with the mug with the SMALLEST amount of thermal energy first and end with the mug with the LARGEST amount of thermal energy.
__2__ C. is a small mug. It is 120°F
__3__ A. is a small mug. It is 100°F
__1__ B. is a large mug. It is 120°F
Answer:
ACB
Explanation:
Thermal energy is the average sum of all kinetic energy of all the molecules of gases. The correct order of mug in decreasing thermal energy is C>A>B.
What is Thermal energy?
Thermal energy is a energy which is possess by a moving object. It is directly proportional to kinetic energy of the molecules. It is very difficult to find the correct value of kinetic energy so we find average kinetic energy. Which is very easy to calculate as compared to calculating kinetic energy. Average kinetic energy is directly proportional to temperature. It is not dependent on the type of gases or mass of gases.
Mathematically,
K.E=2/3KT
Where,
K= Boltzmann constant
T is the temperature
Between A and C whose volume is same, 120°F is the highest temperature so, C will have high thermal energy than A. C will have lowest thermal energy as it has volume larger than that of A and C.
Therefore, the correct order of mug in decreasing thermal energy is C>A>B.
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Foods cook faster when placed in a pressure cooker. This is because the pressure on the surface of the water is
Answer:higher than and higher than
Explanation:
How many moles of sodium sulfate are present in .100 g of the compound?
2.126 x 10^-3 mol
174.3 mol
7.040 x 10^-4 mol
Answer:
7.040 x 10^-4 mol
Explanation:
Fran finds a dark-colored rock that she identifies as basalt. Which property gives the rock its dark color?
O its shape
O its banding
its grain size
O its mineral content
Answer:
Mineral Content.
Explanation:
shape has nothing to do with the color displayed.
Nor does the grain size.
I don't know what banding is. Whatever it is, it is not the answer.
D: mineral content.
Which of the following would be a warning sign that information about a weight loss medication is not reliable science?
Answer: The correct answer is B.
Explanation: The scientists and all test subjects involved in the investigation work for the company that sells the medication and science product or similar is only considered as reliable if it has been tested following the scientific method and if there are not interests that can affect the process.
Determine the volume of 200 g of hydrogen gas.
30 points!! please help chem question
the state of y at room temperature is gas, good luck!
1. An oxide of chromium is found to have the following % composition: 68.4% Cr
and 31.6% 0. Determine this compound's empirical formula.
Answer:
Empirical formula is Cr₂O₃.
Explanation:
Given data:
Percentage of Cr = 68.4%
Percentage of O = 31.6%
Empirical formula = ?
Solution:
Number of gram atoms of Cr = 68.4 / 52 = 1.3 2
Number of gram atoms of O = 31.6 / 16 = 1.98
Atomic ratio:
Cr : O
1.32/1.32 : 1.98/1.32
1 : 1.5
Cr : O = 1 : 1.5
Cr : O = 2(1 : 1.5)
Empirical formula is Cr₂O₃.
15. List the substances A-E in order from most dense to least dense based on the facts provided.
Please write the letters in the spaces provided below.
Substance A: 8.2 g/cm3
Substance B: 3.5 cm and 30.0g
Substance C: 10.0g and 40mL
Substance D: 0.5 g/cm3
Substance E: 2.0cm by 3.0cm by 1.0cm and 4.0g
Most Dense_ _ _ _ _
Least Dense
Answer:
So 1st it is B then D then E then a then C
The order of density of substances ranging from most dense to least dense is :substance B>substance A>substance E>substance C>substance D.
What is density?It is a ratio of substance's mass per unit of volume.Symbol most commonly used for density is р.The SI unit of density is kilogram per cubic meter .It explains how tightly a material is packed together.
There are 2 types of density :1)absolute density 2) relative density.Absolute density is the mass of any substance per unit volume and relative density is the ratio of density of a substance to the density of a given reference material.
Reference material used for relative density is water.The instrument used for measuring density or relative density of liquids is hydrometer. Density is measured at constant temperature and pressure.
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What element is [Xe]6s24f5d6
Answer:
Holmium
Explanation:
Electronic configuration:
[Xe] 6s² 4f⁵ 5d⁶
To know this element, we must first find the atomic number and then look for its position on the periodic table.
Number of electrons in [Xe] = 54;
So the total number of electrons = 54 + 2 + 5 + 6 = 67
This element has an atomic number of 57. On the periodic table, it is Holmium
Common human behavior that seems to be programmed or directed by genes or hormones?
Answer:
There's a lot...lying...rolling eyes...aggression...mating...parenting...sadness...basically alot
Explanation:
Organic whole wheat flour sells in bags weighing 2.915 kilograms.
How much flour is this when rounded to the nearest tenth? Use a place value chart and number line to explain your thinking.
Answer:
2.920
Explanation:
This question tests your knowledge of approximation. If we look at the place values after the decimal point, we have, .915. This corresponds to hundredth, tenth and unit.
Since we have 9.15, in rounding it to the nearest tenth, we have to round it up to .920.
Hence, the weight of the flour to the nearest tenth is 2.920.
In the modern Periodic Table of the Elements, in order of what property are the elements arranged?
atomic number?
date of discovery?
number of neutrons?
Reactivity with hydrogen?
Answer:
They are organized by atomic number, hence the reason for 1,2,3,4, you get where im goin'?
Explanation:
How many moles of Nitrogen in 40.0 g of N2O?
.14 g
25.5 g
14.5 g
Answer:
To do this question. we first have to find the mass% of nitrogen in N2O and then, using that percentage, we can simply find the number of moles of N from the number of moles of N2O
Mass % of Nitrogen:
Mass% of nitrogen = (Molar mass of N2 / Molar mass of N2O)*100
Mass% nitrogen = (28 / 44)*100
Mass% of Nitrogen = 0.63 * 100
Mass% nitrogen = 63%
Mass of Nitrogen:
So, now we can say that in any given mass of N2O. 63% of the total mass is the mass of Nitrogen
Hence, total mass * 63/100 = Mass of Nitrogen
Replacing the variables
40 * 0.63 = Mass of Nitrogen
Mass of Nitrogen = 25.2 grams
what is the correct parent name for an organic compound just one carbon
Answer:
Meth- its full name is Methane
Explanation:
1 methane
2 ethane
3 propane
4 butane
5 pentane
6 hexane
7 heptane
8 octane
9 nonane
10 decane
11 undecane
12 dodecane
HELPPPP . what is this
I'll be honest I'm guessing,
but maybe D
True or False: A chemical reaction ALWAYS results in a ne product being formed
Answer:
True
Explanation:
A chemical reaction will always result in a new product or substance being formed
that is what makes it a chemical reaction.