Which statement is true for nuclear reactions but not for chemical reactions?
#
Choice
A.
They convert some energy into mass.
B.
They convert some mass into energy.
C.
They break bonds between atoms.
D.
They form bonds between atoms.
what will happen when the rates of evaporation and condensation are equal
Which of the following could be described as exotic? *
a. a pair of sneakers
b. a rare type of flower
Answer:
Exotic is something that’s is unique and you can only find it or this thing in some places. The answer is the rare type of flower.
Explanation:
what's the word equation for table salt?
Answer:
Have Nice Day
Explanation:
2NaCI is the answer
The initial amount of low-quality energy available from an energy resource is called its net energy.
Answer:
La cantidad de energía disponible de una fuente de energía determinada se denomina recurso energético. La escasez de recursos energéticos (petróleo, carbón y madera) en algunas de las fuentes de energía más utilizadas plantear necesidad de usar otras fuentes investigar el modo más rentable de emplearlas
Explanation:
Answer:
false
Explanation:
its the amount of high-quality energy available from a given quantity of an energy resource minus the high-quality energy needed to make the energy available.
Explain how the iron pipes change into rust?
which do you think will warm up the plate more quickly?
A. Direct sunlight
B.Indirect sunlight
Answer: B
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identify the state of matter in the box,
Answer:
gas
Explanation:
particles are very far apart
The given diagram represents gaseous state of matter. Both a volume and a definite form are absent from a gas. The separation of gas particles is great.
What is state of matter?Solids, liquids, gases, plus plasma are the four states of matter that may be found in daily life. However, a number of additional states of matter have indeed been found.
Some of these additional states are created when a material transitions among two states of matter and doesn't actually exhibit the characteristics of either state. The most exotic are others. Both a volume and a definite form are absent from a gas. The separation of gas particles is great. The gas in a balloon and the air are two examples of gases. The given diagram represents gaseous state of matter.
Therefore, the given diagram represents gaseous state of matter.
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How many grams of sucrose will I add to the water (0.100 L) in order to make the 3 molal solution.
Answer:
mass = 102.69 g of sucrose
Explanation:
First, you need to use the correct expression of molality (m) which is the following:
m = moles / kg solvent (1)
According to the exercise, we need to get the grams, in other words, the mass of the sucrose. To get the mass, we need the moles and molecular weight of sucrose and use the following expression:
moles = mass / MM (2)
Now, if we replace (2) in (1) we have:
m = mass / MM * kg solvent (3)
From here, we solve for the mass and then:
mass = m * MM * kg solvent (4)
Now, then density of water is 1 kg/L, so, the volume of the water will be the same as it's mass, and the molality is 3 m. The molecular weight of the sucrose is (according to several sources) 342.3 g/mol. Replacing all the data in (4) we have:
mass = 3 mol/kg * 0.1 kg * 342.3 g/mol
mass = 102.69 g of sucroseHope this helps
Why is there an attraction between the two ions in this chemical bond?
Answer:
A metallic bond is a force of attraction between charged metal ions and the electrons that are in the delocalized bond, which covers the assembly of ions. A covalent bond is the force of attraction between the nuclei of atoms, and the electrons shared between them.
Explanation:
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond can be generated by electrostatic attraction between charged ions (for example, ionic bonds) or by electron sharing (for example, covalent bonds).
I hope this helps you :)
Calculate the percentage composition of SrBr2
Answer:
64.6% of Br and 35.4% of Sr
Explanation:
The percentage composition is obtained defining the percentage in mass of each atom in a molecule.
To solve this question we must find the mass of each atom in 1 mole:
Molar mass Br: 79.904g/mol
Molar mass Sr: 87.62g/mol
The molar mass of SrBr2 is:
79.904g/mol*2 + 87.62g/mol =
159.808g/mol + 87.62g/mol =
247.428g/mol
The percentage of Br is:
79.904g/mol*2 = 159.808g/mol / 247.428g/mol * 100
= 64.6% of Br
And percentage of Sr is:
87.62g/mol / 247.428g/mol * 100
= 35.4% of Sr
Describe what is wrong with this sentence:
"When you kick a soccer ball, you create new
kinetic energy!"
Answer:
You transfer kinetic energy from you foot to the ball.
Explanation:
Energy cannot be created or destroyed.
Answer:
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If you came upon an aqueous solution in the lab which reacted with a strip of magnesium , you could make the hypothesis that the compound in this solution is :
a . an acid
b . a base
C. a salt
Answer: A
Explanation: Bases Don't react with metals, acids do. Salt tend not to have that sort of reaction either.
Since dilute acids can react with metal strips, the solution must be an acid.
What is an acid?An acid is a substance that produces the hydrogen ions in solution. We should note that one of the properties of acids is that their dilute solutions are able to react with metals to evolve hydrogen gas.
As such, if the solution can react with a strip of magnessium then the solution must be an acid.
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Write the balanced nuclear equation.
263
1.
Sg
254 Rf + A He
106
104
4
2.
211
At
83
He
2
3.
248
96
Cm + He
4
-
235
U
92
+
He
4.
2
Answer:
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A generator can produce both _______________________ (DC), which flows in one direction,and AC current;large power plants produce ___________________.
Answer:
1. direct current. 2. electrical power
Explanation
i believe number 2 is right
In a tug of war, the team on the left pulls with a force of 430 N and the team on the right pulls with a force of 420 N. What is the net force on the rope?
A. 10 N to the right
B. 10 N to the left
C. 420 N to the right
D. 430 N to the left
Answor
c
Explanation:
Geothermal energy is produced from a combination of high pressure and the breakdown of______ underground.
Fill in the blank
Speed is the rate of change of position expressed as _____ traveled per unit of time. A. direction B. meter C. displacement D. distance... Help!!!
Answer:
Distance
Explanation:
3C6H206
How many atoms are there? Help ASAP!
Answer:
the answer to this is 74 :)
The extraction of zinc from zinc blend and explain how the zinc oxide be reduced using Carbon monoxide Electrolysis
Answer:
Zinc blend is Zinc sulphide, ZnS.
ZnS is roasted in air producing ZnO and Sulphur dioxide.
ZnO is reduced to Zn by CO.
Further purification is done by electrolysis.
Graphene is made of pure _______________.
Answer:
Graphene is made of pure carbon.
Explanation:
It is a material in which the carbon atoms are arranged in a single layer, creating a honeycomb pattern. It should be stressed that this layer of carbon is only one atom thick, although some authors consider up to ten layers of carbon to be graphene.
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How can you know if something has energy?
(Can you explain it in a sentence?)
What kind of intermolecular forces between an ammonia molecule and a water molecule? Note: there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force
Answer:
hydrogen bonding
Explanation:
Dipole-Dipole, Dispersion, hydrogen bonding and ion bond
What the common uses for Bohrium?
Answer:
Explanation:
Bohrium's most stable isotope, bohrium-270, has a half-life of about 1 minute. It decays into dubnium-266 through alpha decay. Since only a few atoms of bohrium have ever been made, there are currently no uses for bohrium outside of basic scientific research.
Answer:
look it up?
Explanation:
Put these events in order.
= Your phone contacts a base station in a cell.
= Once connected, a duplex system allows you to talk to the other person at the same time.
= You dial a number on your cell phone.
The MTSO then connects you to the other device.
= A base station contacts the Mobile Telephone Switching Office (MTSO).
Answer:
You dial a number on your phone
Your phone contacts a base station
The base station contacts the MTSO
The MTSO connects you to the other device
You talk to the person on the other device.
thermal conductors what
A partir de 140 g de n2 y una cantidad de h2 se obtuvo 153G de NH³. Cual es el % de rendimiento de la reacción química
Respuesta:
90.0 %
Explicación:
Paso 1: Escribir la ecuación química balanceada
N₂ + 3 H₂ ⇒ 2 NH₃
Paso 2: Calcular el rendimiento teórico de NH₃ a partir de 140 g de N₂
En la ecuación balanceada, participan de N₂: 1 mol × 28.01 g/mol = 28.01 g y de NH₃: 2 mol × 17.03 g/mol = 34.06 g.
140 g N₂ × 34.06 g NH₃ /28.01 g N₂ = 170 g NH₃
Paso 3: Calcular el rendimiento porcentual de NH₃
El rendimiento experimental de NH₃ es 153 g. Podemos calcular el rendimiento porcentual usando la siguiente fórmula.
R% = rendimiento experimental / rendimiento teórico × 100%
R% = 153 g / 170 g × 100% = 90.0 %
Faster-moving water can carry a greater load.
true or false
Answer:
That is false
Explanation:
Just because it moves faster doesn't mean that it can carry and bigger load.
Answer:
False
Explanation:
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A scientist wants to test the effectiveness of a medicine in treating
headaches. He puts the medicine into cookies and then tells his subjects to
lie down and have a cookie when they have a headache. He asks them to give
him feedback about how well these relaxation techniques work to cure their
headaches. What rule of ethics does this experiment break?
O A. The subjects are not informed that they are taking a medicine.
B. It is likely to harm his subjects.
C. The scientist is taking the work of others by reviewing the
subjects' feedback.
D. It is testing more than one variable at the same time.
A(n)
Is the explanation of phenomena through the use of several Investigations or a scientific method.
O hypothesis
O scientific theory
O scientific law