Answer:
I think b but I could be wrong
Answer:
a
Explanation:
i just took it
How might it be possible for a substance to go directly from a solid to a gas without being liquid in between
It is possible for a substance to go directly from solid to gaseous state due to sublimation.
What is sublimation?Sublimation is defined as a process in which transition of a substance takes place from solid to gas phase without passing through the intermediate liquid phase.
It is an endothermic process which occurs at temperatures and pressure below the triple point. Reverse process of sublimation is deposition in which substances in gaseous phase directly go into solid phase.
It only refers to the change in state and not for describing transformation of substances. Sublimation requires an additional amount of energy and is an endothermic change proceeding with absorption of energy.
The enthalpy of sublimation is calculated by adding enthalpy of fusion and enthalpy of vaporization.
Learn more about sublimation,here:
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Chemical Formula 1
2H²O²
Number of molecules in chemical formula 1
(A) 1
(A) 2
(C) 3
(D) 4
Chemical Formula 2
4HCI
Number of molecules in chemical formula 2
(A) 2
(B) 4
(C) 6
(D) 8
Chemical Formula 3
3CH⁴
Number of molecules in chemical formula 3
(A) 1
(B) 2
(C) 3
(D) 4
Chemical Formula 4
C⁶H¹²O⁶
Number of molecules in chemical formula 4
(A) 0
(B) 1
(C) 3
(D) 24
Chemical Formula 5
5CaCI
Number of total atoms in chemical formula 5
(A) 5
(B) 7
(C) 11
(D) 15
Chemical Formula 6
NaCI
Number of total atoms in chemical formula 6
(A) 1
(B) 2
(C) 3
(D) 4
Chemical Formula 7
6NH³
Number of total atoms in chemical formula 7
(A) 2
(B) 3
(C) 3
(D) 9
Chemical Formula 8
3H²O
Number of total atoms in chemical formula
(A) 2
(B) 3
(C) 5
(D) 6
Chemical Formula 9
2Fe²O³
Number of total atoms in chemical formula 9
(A) 2
(B) 3
(C) 7
(D) 10
Chemical Formula 10
8CO
Number of total atoms in chemical formula 10
(A) 1
(B) 2
(C) 8
(D) 9
Just try ur Best ok your welcome
If a molecule of CH4 diffuses a distance of 0.530 m from a point source, calculate the distance (meters) that a molecule of N2 would diffuse under the same conditions for the same period of time (1 second).
Explanation:
Assume the gases each diffuse in one second, in order to create a rate.
Set rate1 = N2 = x
Set rate2 = CH4 = 0.530 m/sThe molecular weight of N2 = 28.0
The molecular weight of CH4 = 16.0
Graham's Law is:
r1 over r2 = √MM2 over √MM1
Substituting, we have:
x / 0.530 = √(16.0 / 28.0)x = 0.400 m/s
_________energy is stored in chemical bonds.
Answer:
Chemical energy is the potential energy stored in the arrangement of atoms within molecules. Breaking chemical bonds requires energy, while forming new chemical bonds releases energy. The more energy that's released when a bond forms, the more stable that bond is.
Explanation:
Can someone please help me I really need help
Answer:
atoms from different elements
can someone plz help me with this question its hard ASAP
Answer:
d
Explanation:
Read the following excerpt and answer the question:
Scientists often refer to mushrooms as the "dark matter of biology" because we don't know much about them. Mushrooms are not plants
because they have no chlorophyll and cannot make their own food. They are actually fungi and absorb nutrients from their surrounding
environments, and they can even thrive at the bottom of the ocean or in the middle of a desert!
Use your own words to summarize why mushrooms and plants differ in their needs to use radiant energy from the sun.
Answer:
\/
Explanation:
Plants rely directly on the energy from the sun. The chloroplast create glucose from the sun rays through a process known as photosynthesis. Mushrooms, on the other hand, do not have the ability to use the sun's rays to create food, so they instead gather their energy from the nutrients from the soil or decaying things, such as plants, that once used the sun's radiation as sustenance. So basically mushrooms use the radiant energy from the sun indirectly and plants use it directly
what part of the atom canot have its part acuratly determined ill give brainlest hurry
Answer:
The answer to this question would be electron.
Electron is located on the outer side of the atom and constantly moving in an orbit so its location cannot be accurately determined. The cloud around the center of the atom is drawn to picture the orbit.
Neutron and proton located in the middle of an atom in a part that called nucleus. Nucleus location is kept at the center and it doesn't move.
Explanation:
Describe the motion of molecules in each of the three states of matter.
Answer:
EASSSSSYYY give me a harder question smh
if you want you can give me Brainliest answer lol
Explanation:
A solid’s particles are packed closely together. The forces between the particles are strong enough that the particles cannot move freely.
A liquid is a fluid that conforms to the shape of its container but that retains a nearly constant volume independent of pressure. The volume is definite (does not change) if the temperature and pressure are constant.
Gas molecules have either very weak bonds or no bonds at all, so they can move freely and quickly. Because of this, not only will a gas conform to the shape of its container, it will also expand to completely fill the container.
2. When it is winter, the United States receives the least direct solar energy, as compared with the rest of the year. Why does this happen? Pg. 36,43
Answer:
This is because earth is at a tilt, and the tilt is the cause of all seasons. In winter, we are the furthest from the sun due to the tilt.
Explanation:
why do u think some consumers believe that labortory testing of a product serves as proof of quality?
Answer:
to show that the consumer can use it in a way that the lab cant. with the consumer seeing that the product they're purchasing is good quality can lead to a demand for the product!
Explanation:
Which of the following objects would require the use of a large-scale model A. An atom B. A car engine C. A frog's heart D. The Mississippi River
Answer:
A. An atom
Explanation:
A large scale model is one that is bigger than the object itself. These are needed to visualise structures and behaviours that we cannot normally see. A large scale model is needed for small objects, such as an atom. Larger objects do not need even bigger models
What is surface area?
Which of the following is not part of a phospholipd?
A) galactose
B) fatty acid
C) phosphate
D) glycerol
Pls help due today
Answer:
A) Glycerol
Explana
I need help ASAP please!
Answer:
The mass is 12.0107 but it rounds up to 12
The density of pure solid copper is
2.54 g/mL. What is the mass of 250 milliliters of the substance
Answer:
The answer is 508 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question we have
mass = 2.54 × 200
We have the final answer as
508 gHope this helps you
please answer it ??
Answer:
A is √34
Explanation:
We can solve for the hypotenuse "A" using the Pythagorean theorem.
a²+b²=c²
3²+5²=c²
9+25=c²
34=c²
√c=√34
c=√34 --> A
A tennis ball is moving at a speed of 96.0 miles per hour. Which of the
following is the speed of the ball in meters per second?
Answer:
42.9158 m/s
Explanation:
the answer is there above
204 g of Thallium & 35 g of chlorine?
Is ibuprofen conductive in water?
A sample of iron has a volume of 12 mL. If the mass of this object is 94 g, what is the density of iron? Will it sink or float in water? *
Answer:
density = 7.83g/mL
It will sink in water.
Explanation:
D = mass/volume
94/12 = 7.83 g/mL
density of water is 1g/mL
Object is more dense than water, meaning it will sink.
50 POINTS QUICK Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions.
Online Content: Site 1
What goods did the Ubaidian people produce? Describe their agricultural techniques. (Site 1)
Answer: Ubaidian people produce wheat, barley, and peas. Ubaidian people developed new agricultural technique in planting and harvesting their crops.
(I hope this helps ^^)
A positively charged object is placed a short distance from a negatively charged object.
What would happen to the objects if the distance between them doubled?
The objects would -
A)attract each other and the force would decrease
B)repel each other and the force would decrease
C)attract each other and the force would increase
D)repel each other and the force would increase
Answer: attract eachother and the force would decrease
Explanation:
Which statement accurately describes the two balls?
A. The golf ball has more inertia than the table-tennis ball, so it takes
more force to change the motion of the golf ball.
O B. The table-tennis ball has more inertia than the golf ball, so it takes
more force to change the motion of the table-tennis ball.
C. The table tennis ball has less inertia than the golf ball, so it takes
more force to change the motion of the table-tennis ball.
D. The golf ball has less inertia than the table tennis ball, so it takes
more force to change the motion of the golf ball.
SUBMIT
Answer:
A
Explanation:
The golf ball has more inertia than the table-tennis ball, so it takes
more force to change the motion of the golf ball.
Is all matter the same?
Answer:
What is your body made of? Your first answer may be that it is made up of different organs like the heart, lungs, and stomach, which work together to keep it going. Or you could go even closer and say that it is made of many types of cells. However, at the most basic level, your body — and indeed, all life, like everything that is not alive — is made up of atoms, often organized into larger structures called molecules
Explanation:
Can regions that experience extreme low temperatures be located right
next to regions that experience very high temperatures?
Yes
No
Answer:No
Explanation:
Well yes but no, There cant be high tempreture that is 100 degrees and a low tempreture that is 20 degress, there has to be a mid inbetween both, they cant be next to eachother.
Why is the nucleus of an atom positively charged?
Answer:
The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.
The its motion______ energy of an object is related to both the object's position and it's motion.
O A) kinetic
OB) potential
C) mechanical
Answer:
mechanical
Explanation:
cause mechanical energy is the sum of potential and kinetic enery
3. How do patterns in the periodic table predict the behavior and properties of elements?
Which of the following is an example of a compound?
Group of answer choices
H2
O
H2O
Na
Answer:
H2O is a compound because its a main constitute of earths hydrosphere