Answer:
Exothermic
Explanation:
Exothermic reactions release heat, endothermic absorb heat, and precipitate is a solid formed from a solution
Answer:
B.
Explanation:
Gives off heat,.
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
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
how much protons, neutrons, and electrons does iodine-132 1- ion have
The number of protons, neutrons, and electrons is iodine-132, Iodine has 53 protons and 53 electrons as it has no charge the number of protons equals the number of electrons. Iodine-131 has 131 protons as well as neutrons.
What are protons?Protons are subatomic particles that have a positive charge. The strong nuclear force holds protons together in the nucleus of an atom. Neutrons are non-charged subatomic particles (they are neutral).
A proton is a subatomic particle found in every atom's nucleus. The particle has a positive electrical charge that is equal to and opposite to the electron's.
Iodine-132 is the number of protons, neutrons, and electrons. Iodine has 53 protons and 53 electrons because it has no charge, so the number of protons equals the number of electrons. Iodine-131 contains 131 protons and neutrons.
Thus, there will be 131 protons as well as neutrons in iodine-131.
For more details regarding protons, visit:
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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
How much pressure is in the transition zone? Just need the answer.
☆<《 HOPE IT WILL HELP YOU 》>☆
Explanation:
The transition zoneis the part of Earth's mental. It is located between the lower mental and upper mental. It is between the depth of 410km TO 660km
True
False
Unlike gases, solids cannot
be compressed to a smaller
volume
Similar to the structure of
solids, atoms within a liquid
are in a fixed or locked
position
Both solids and liquids have
a fixed (unchanging) physical
shape
Both solids and liquids have
a fixed (unchanging) volume
Gases have a fixed
(unchanging) volume, shape,
and structure
Answer: True
Explanation:
An object accelerates 4.0 m/s2 when a force of 10 newtons is applied to it. What is the mass of the object
Answer:
The answer is 2.5 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
f is the force
a is the acceleration
We have
[tex]m = \frac{10}{4} = \frac{5}{2} \\ [/tex]
We have the final answer as
2.5 kgHope this helps you
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:
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:
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.
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At point R, rocks melt underground to form magma. Which is another process that contributes to the formation of rock at point R?
compacting of sediments on the mountain
cooling as the lava runs down the mountain
weathering of the mountain from the environment
eroding of different rocks at the base of the mountain
Another process that contributes to the formation of rock at point R is the:
B. Cooling as the lava runs down the mountainAccording to the given question, we need to find another process which can help with the rock formation at point R where the rock melts underground to form magma.
As a result of this, another process through which makes a significant contribution to the formation of rock at point R is the cooling of the lava as the magma which has been melted runs down the mountain.
Therefore, the correct answer is option B
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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
Can someone please help me I really need help
Answer:
atoms from different elements
i neeeed helllpppsss
Answer:
Kg / m ^3. options no 2OR Kilograms per cubic metre is the corret answer
It helps you......
. Thank you ☺️☺️
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
*ANSWER FAST AND YOU WILL GET BRAINLIEST* -
According to le châteliers principle how would a change in pressure affect a gaseous system in equilibrium?
A. All equilibrium interactions would stop
B. The equilibrium would shift in the direction of the change
C. The number of both reactants and products would increase
D. The equilibrium would shift to reduce the pressure change
Answer:
D.
Explanation:
Answer:
The correct answer is d. i took the test and got it right
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.
Is ibuprofen conductive in water?
An neutral atom of aluminum 27 contains
Answer:Find it
Explanation:
Aluminium-27 is an isotope of aluminium characterized by the fact that is has a mass number equal to
27
.
Now, an atom's mass number tells you the total number of protons and of neutrons that atom has in its nucleus. Since you're dealing with an isotope of aluminium, it follows that this atom must have the exact same number of protons in its nucleus.
The number of protons an atom has in its nucleus is given by the atomic number. A quick looks in the periodic table will show that aluminium has an atomic number equal to
13
.
This means that any atom that is an isotope of aluminium will have
13
protons in its nucleus.
Since you're dealing with a neutral atom, the number of electrons that surround the nucleus must be equal to the number of protons found in the nucleus.
Therefore, the aluminium-27 isotope will have
13
electrons surrounding its nucleus.
Finally, use the known mass number to determine how many neutrons you have
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?
Identify the group number of following oxides/hydrides in Mendeleev
periodic table:
i) R2O3 ii) R2O iii) RO2 iv) RH2 v) R2O7 vi) RH3
Answer:
See explanation
Explanation:
The oxides or hydrides are formed by exchange of valency between the two atoms involved. The group of the atom bonded to oxygen or hydrogen in the binary compound can be deduced by considering the subscript attached to the oxygen or hydrogen atom.
Now let us take the journey;
R2O3- refers to an oxide of a group 13 element, eg Al2O3
R2O - refers to an oxide of group a group 1 element e.gNa2O
RO2 - refers to an oxide of a group 14, 15 or 16 element such as CO2, NO2 or SO2
RH2 - refers to the hydride of a group 12 element Eg CaH2
R2O7 - refers to an oxide of a group 17 element E.g Cl2O7
RH3- refers to a hydride of a group 13 element E.g AlH3
I need help ASAP please!
Answer:
The mass is 12.0107 but it rounds up to 12
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
Expressed to the correct number of significant figures, what is the correct sum of (3.04g + 4.134g + 6.1g)?
Answer:
13.3g
Explanation:
3.04g + 4.134g + 6.1g = 13.274g
=13.3g
When expressing the correct number of significant figures in addition, you go to the last common decimal place. In this case that is 0.1 because all the numbers have this decimal place.
This is because your measurement can only be as precise as the least precise measurement. The more decimal places in the measurement, the more precise the measurement.
How many moles are in 234.4 grams of oxygen
Answer:
7.325 mol.
Explanation:
use the formula n=m/mr
so that makes:
234.4/16*2
which is 7.325 mol.
First correct answer will get brainliest
O the elements that make up glucose are different than the elements that make up ethanol.
O the ratio of the elements is different in ethanol than in glucose.
O the chemical properties of the elements that make up the compounds are different.
O glucose has more elements than the ethanol.
Answer:
the second one
Explanation:
becuase i asked my teacher
Answer:this ? 2end one
Explanation:
Question 1 (1 point)
How many atoms are in 223 g of cesium?
Answer : The correct option is (b) [tex]1.01\times 10^{24}[/tex]
Explanation : Given,
Mass of cesium = 223 g
Molar mass of cesium = 133 g/mole
First we have to calculate the moles of cesium.
[tex]\text{Moles of cesium}=\frac{\text{Given mass cesium}}{\text{Molar mass cesium}}[/tex]
Now putting all the given values in this formula, we get:
[tex]\text{Moles of cesium}=\frac{223g}{133g/mol}=1.67mol[/tex]
Now we have to calculate the number of atoms of cesium.
As, 1 mole of cesium contains [tex]6.022\times 10^{23}[/tex] atoms of cesium
So, 1.67 mole of cesium contains [tex]1.67\times 6.022\times 10^{23}=1.01\times 10^{24}[/tex] atoms of cesium
Therefore, the number of atoms of cesium are [tex]1.01\times 10^{24}[/tex]
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.
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.