Answer:
carbon is a nonmetal with 4 valence electrons
Explanation:
The element carbon is on the nonmetal section of the periodic table.
what type of wave moves the particles parallel to the motion of the wave
a.electromagnetic
b. longitudinal
c. transverse
d.water
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Answer:
1.melting
2.freezing
3.
Explanation:
That's all I got sorry
Answer:
Look at the picture
Explanation:
why does the sky appear orang or red at sunset and sunrise?
Answer:
Because the sun is low on the horizon, sunlight passes through more air at sunset and sunrise than during the day, when the sun is higher in the sky. More atmosphere means more molecules to scatter the violet and blue light away from your eyes.
Please help me find the correct answer, thank you.
Answer:
The third line
Explanation:
The first one us wrong because they're not all found inside,electron is outside.
The second one is wrong as I explained previously.
Lastly the fourth line is wrong because protons are found in the nucleus.
In any engineering design problem, the first step is to understand the problem and identify one or more possible solutions. In this task, you’ll analyze the problems you face as the chemical engineer challenged with setting up the ammonia-making process. Recall the chemical equation for producing ammonia:
N2 + 3H2 ⇌ 2NH3 + energy
2.How can you change the chemical equilibrium to benefit the company? What benefits will be realized?
Answer:
Explanation:
2NH3(g)(→ N2(g)(+(3H2(g)
Eventually, these two reactions occur at the same rate. When this happens,
the concentrations of nitrogen, hydrogen, and ammonia become constant, and the
system is said to be “at equilibrium”. Typically,
we represent chemical equilibrium
using a double-headed reaction arrow:
How many moles of O₂ are needed to burn 2.5 moles of CH₃OH?
Answer:
3.75 moles
Explanation:
The chemical equation is 2CH₃OH + 3O₂ -> 2CO₂ + 4H₂O
2 moles of CH₃OH are burned by 3 moles of O₂
For 2.5 moles of CH₃OH are burned by x moles of O₂
Let's solve for x :
2*x=2.5*3 => 2*x=7.5 => x=3.75 moles of O₂ are needed to burn 2.5 moles of CH₃OH
Given this balanced equation: CS2 + 3 O2 CO2 + 2 SO2
Calculate how many moles of SO2 can be produced with when given 4 moles of CS2.
58.67 g
Now calculate how many moles of SO2 can be produced with when given 4 moles of O2.
Which one is the limiting reactant (4 moles CS2 or 4 moles of O2)? How do you know?
Answer: The FitnessGram PACER Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The test is used to measure a student's aerobic capacity as part of the FitnessGram assessment. Students run back and forth as many times as they can, each lap signaled by a beep sound.
Explanation:
Toma en cuenta los textos para responder estas interrogantes: ¿Consideramos que la aplicación de las medidas de seguridad depende de las características de tu entorno?
Answer:
Si.
Explicación:
Sí, la aplicación de medidas de seguridad depende de las características de su entorno porque el entorno nos brinda para elegir las medidas de seguridad. Existen diferentes instrumentos utilizados para la seguridad de diferentes entornos. Algunas medidas de seguridad se aplican en un entorno mientras que el otro se aplica a otro entorno. Por ejemplo, el vallado es una medida de seguridad que se puede aplicar en el terreno pero no en el agua o cualquier zona fangosa, por lo que podemos decir que las características físicas deciden qué medida de seguridad se debe instalar en el entorno.
Which pair of elements is in the same period? (Check ALL that apply) *
17 points
G
F
D
R
J
Answer:
D and R are in the same period
Explanation:
remember groups are vertical and periods are horizontal!
If 20% of the nucleotides in a DNA molecule are adenine, what percentage of each of the other three bases would be found in this molecule and explain the answer
This is known as _______________________ rules
please i need help thank you
When the equation H202 + H2O + O2 is completely balanced, the SUM of all the coefficients will be
A.5
B. 8
C.3
D.4
BRAINLIEST
If the [H3O+1] < [OH-1] the solution is...
a. acidic
b. neutral
c. basic
d. none of the above
pls show your work thank you will mark the Brainliest
Answer:
1.42L of the 9.0M NaOH are required
Explanation:
Molarity is an unit of concentration in chemistry defined as the ratio of the moles of a solute (In this case NaOH) and the volume of the solution.
To solve this question we must know the moles of NaOH required in 4.25L of a 3.0M NaOH as follows:
4.25L * (3.0moles / L) = 12.75 moles of NaOH are required
As all NaOH must come from the 9.0M NaOH the volume we need is:
12.75 moles NaOH * (1L / 9.0 moles NaOH) =
1.42L of the 9.0M NaOH are requiredWhen 28242 J are transferred to water sample, its temperature increases 18⁰C to 63⁰C. Determine the mass of the water sample.
Answer:
149.79
Explanation:
Formula
Joules = m * c * delta (t)
Givens
J = 28242
m = ?
c = 4.19
Δt = 63 - 18 = 45
Solution
28242 = m * 4.19 * 45
28242 = m * 188.55
m = 28242 / 188.55
m = 149.79
The healthiest foods are low in nutrients such as _______ and _______, and high in nutrients such as _______ and _______.
Answer:
Explanation:
The healthiest foods are low in nutrients such as sodium and fats, and high in nutrients such as proteins and fiber.
Determine which molecule in each pair has the stronger intermolecular forces. Explain why. The main reason that NH3 has [ Select ] intermolecular forces than CH4 is that NH3 [ Select ] . The main reason that NO2 has [ Select ] intermolecular forces than CO2 is that NO2 [ Select ] . The main reason that CS2 has [ Select ] intermolecular forces than CO2 is that CS2 [ Select ] .
Answer:
See explanation
Explanation:
As for NH3 and CH4, the former is a polar molecule and possess a dipole. Hence, in addition to dispersion forces, dipole-dipole interaction as well as hydrogen bonding creates a stronger intermolecular interaction than in nonpolar CH4 where only dispersion forces are in operation.
Between NO2 and CO2, the former possesses a dipole moment while the later does not. As a result of that, dipole interaction are in operation in NO2 while only dispersion forces are n operation in CO2.
Between CO2 and CS2, the both molecules are nonpolar but CS2 has a greater molecular mass than CO2. Recall that the greater the molecular mass of a substance the greater its magnitude of intermolecular forces.
Taking into account the intermolecular forces, you get that:
The main reason that NH₃ has weaker intermolecular forces than CH₄ is that NH₃, being nonpolar, possesses London Dispersion Forces, while CH₄ possesses the Hydrogen Bonding forces.The main reason that NO₂ has the same intermolecular forces than CO₂ is that in NO₂ and CO₂ there are London forces because they are nonpolar molecules. The main reason that CS₂ has the same intermolecular forces than CO₂ is that CS₂ in CS₂ and CO₂ there are London forces because they are nonpolar molecules.Intermolecular forces or bonds are those interactions that hold molecules together. These are electrostatic forces.
Van der Waals forces are weak attractions that hold electrically neutral molecules together. At some point these molecules present an induced dipole, that is, the molecule acquires a partially positive and a partially negative charge momentarily, causing them to attract each other. They are Van de Waals forces: Dipole - Dipole Forces, London Forces, Ion - Dipole Forces.
London Dispersion Forces: occurs between nonpolar molecules due to the movement of electrons. At some point there are more electrons to one side, which, being close to another atom or molecule, the electrons of the second are repelled, originating two instantaneous dipoles, which originate an attractive force. In summary, this type of force occurs because when two molecules approach, a distortion of the electronic clouds of both is originated, generating in them, transient induced dipoles, due to the movement of the electrons, thus allowing them to interact with each other. They are very weak forces.Ion-ion forces: It is the attraction between two ions of different charges: cations (positively charged ion) and anions (negatively charged ion). That is, it occurs between different charged molecules that will tend to form an electrostatic bond between the ends of opposite charges due to the attraction between them.Ion-dipole forces: these are forces of attraction between an ion (an atom that has lost or gained an electron, so it has a charge) and a polar molecule. A molecule is a dipole when there is an asymmetric distribution of electrons because the molecule is made up of atoms of different electronegativity. The ion then binds to the part of the molecule that has its opposite charge: the positive end of the polar molecule is oriented towards the anion (negatively charged ion) and the negative end of the polar molecule is oriented towards the cation ( positively charged ion).Dipole-dipole forces: dipole-dipole forces are forces of attraction between polar molecules. These molecules attract when the positive end of one of them is close to the negative of the other.Hydrogen bonds: they are a type of dipole-dipole force. In this interaction, a molecule that presents hydrogen interacts with another that presents an atom with high electronegativity, such as oxygen, fluorine or nitrogen (O, F, N). In this way, between the hydrogen, which has a low electronegativity and the electronegative atom, an interaction is established, due to their opposite charges.The relative order of magnitude of the intermolecular forces is:
Ion-ion forces> Ion-dipole forces> Hydrogen bonds> Dipole-dipole forces> London Dispersion Forces
Taking into account all the above, it can be said that:
The main reason that NH₃ has weaker intermolecular forces than CH₄ is that NH₃, being nonpolar, possesses London Dispersion Forces, while CH₄ possesses the Hydrogen Bonding forces.The main reason that NO₂ has the same intermolecular forces than CO₂ is that in NO₂ and CO₂ there are London forces because they are nonpolar molecules. The main reason that CS₂ has the same intermolecular forces than CO₂ is that CS₂ in CS₂ and CO₂ there are London forces because they are nonpolar molecules.Learn more:
https://brainly.com/question/17111432?referrer=searchResultshttps://brainly.com/question/14220340?referrer=searchResults72.3 g of ice at -15.0 o C has heat energy added to it until it becomes steam at 145 o C. Calculate the total amount of heat energy needed (in Joules) to accomplish this.
Answer:
H = 226,311.66J
Explanation:
Hello there!
In this case, according to the thermodynamic path ice takes up to steam:
1. Ice (-15°C) --> Ice (0°C) H1
2. Ice (0°C) ---> Water (0°C) H2
3. Water (0°C) --> Water (100°C) H3
4. Water (100°C) --> Steam (100°C) H4
5. Steam (100°C) --> Steam (145°C) H5
It is possible for us to infer that H1, H3 and H5 are computed by means of the mass, specific heat and change in temperature as sensible heat. On the flip side, H2 and H4 are computed as latent heat. Thus, we proceed as follows:
[tex]H1=72.3g*2.093\frac{J}{g\°C}(0+15)\°C=2269.86J\\\\H2=72.3g*334.1\frac{J}{g}=24155.43J\\\\H3=72.3g*4.184 \frac{J}{g\°C}*(100-0)\°C=30250.32J\\\\H4=72.3g*2255.83\frac{J}{g}=163096.51J\\\\H5=72.3g* 2.010 \frac{J}{g\°C}*(145-100)\°C=6539.54J[/tex]
Then, we add them up to obtain the total heat:
[tex]H=H1+H2+H3+H4+H5\\\\H=2269.86J+24155.43J+30250.32J+163096.51J+6539.54J\\\\H=226311.66J[/tex]
Best regards!
Which of the following statements correctly describes what happens in all chemical reactions?
Answer:
Bonds between atoms are broken/ or new bonds are formed
Explanation:
Due to chemical changes.
What is the volume, in liters, of 2.75 grams of fluorine gas at 35.0°C and 4.55 atm pressure?
The volume (in litres) of 2.75 g of fluorine gas at 35 °C and 4.55 atm is 0.402 L
How to determine the mole of fluorine gasMass of F₂ = 2.75 gMolar mass of F₂ = 2 × 19 = 38 g/mol Mole of F₂ =?
Mole = mass / molar mass
Mole of F₂ = 2.75 / 38
Mole of F₂ = 0.0724 mole
How to determine the volume Temperature (T) = 35 °C = 35 + 273 = 308 KPressure (P) = 4.55 atmGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) = 0.0724 moleVolume (V) =?Using the ideal gas equation, the volume of the gas can be obtained as follow:
PV = nRT
Divide both side by P
V = nRT / P
V = ( 0.0724 × 0.0821 × 308) / 4.55
V = 0.402 L
Learn more about ideal gas equation:
https://brainly.com/question/4147359
Please help me!!!!!!!!! :-]
Which would easily give up more electrons during bonding? Use Periodic Table.
Answer:
I'm pretty sure that it's lithium because it gives up one of their 3 electrons, so li
Why do you think it is important for plants to be able to regulate the level of water in their bodies
Answer:
Plants need to regulate the level of water in their bodies in order to be able to carry out several essential processes like photosynthesis and respiration as well as maintain cell turgidity, without which the plant will not survive in its given environment.
Explanation:
The ability of plants to regulate the amount of water in their bodies is known as water balance.
Plants need water in order to carry out many of their essential life functions such as photosynthesis, respiration, nutrition,etc. They also need water in order to order to maintain cell turgidity which serves to support the plant and keep them upright in order for them to absorb sunlight for photosynthesis. Water is also needed in cell division and growth in plants. Without water the plant would not survive, as it would not be able to carry out these essential life processes.
Water balance in plants is maintained through the process of transportation. Transpiration is the process by which water leaves the plant by evaporation through its leaves. When there is an excess of water absorbed by the plant through its root hairs, the rate of transpiration in plant increases. However, when there is little quantity of water available for the plant to use for its cellular processes, the rate of transportation reduces. The opening and closing of the stomata in the leaves of plants regulates the process of transportation.
A gamma ray emission results in the release of energy without any apparent change in mass or nuclear charge.
Answer:
the answer to this is b thanks for
Answer:
True
A Gamma-Ray emission results in the release of energy without any apparent change in mass or nuclear charges
what Is The Use Of Sulpurdioxide
Sulfur dioxide is used as a food preservative, disinfectant, etc.
whoever helps me will get brainlist
Answer:
Show us the arrows, how are we suppose to answer?
Explanation:
What gas in the air is used by plants to make their own food? (2 points)
Nitrogen
Water vapor
Carbon dioxide
Oxygen
Answer:
Carbon Dioxide
Explanation:
Carbon dioxide gets turned into oxygen
Nitric acid+ calcium oxide gives what
Answer:
HNO3 + Ca(OH)2 ====> H2O + Ca(NO3)2
it gives water and Calcium nitrate
Hope to helpfull.
Answer:
HNO3 + Ca(OH)2 ====> H2O + Ca(NO3)2
3. An area where a particular plant has thrived for 50 million years suffers a
100-year-long drought. What evidence of the drought might be found in the fossil
record?
A. Fossils of the plant are abundant right up until the present day.
B. Fossils of the plant appear in recent rock layers but not in older ones.
C. Fossils of the plant are present in older rocks but disappear at a point in the
fossil record
D. It is impossible for the fossil record to show evidence of the drought.
Answer:
Fossils of the plant are abundant right up until the present day. Fossils of the plant appear in recent rock layers but not in older ones.
Explanation:
yay
True or False: A heterozygous genotype produces the dominant phenotype because the dominant allele masks the recessive allele.
Is it true or false guys??
c4h8o3 lewis structure
Answer:
what
Explanation:
ummm I... . .. .. . . . . . . . . .