Answer:
sigma bond
represents two electrons
Explanation:
The bond between hydrogen and oxygen is sigma bond because the bond between hydrogen and oxygen is covalent means sharing of electron takes place between two atoms and we know that sigma bond is also occurs in a covalent bond in which overlapping of atomic orbitals or hybrid orbitals along the bond axis occurs. Both also represent two electrons because both atoms share one electron each so we can say that the two atoms represents two electrons.
Separation units often use membranes, absorbers, and other devices to reduce the mole fraction of selected constituents in gaseous mixtures. Consider a mixture of hydrocarbons that consists of 62 percent (by volume) methane, 28 percent ethane, and 10 percent propane. After passing through a separator, the mole fraction of the propane is reduced to 1 percent. The mixture pressure before and after the separation is 100 kPa. Determine the change in the partial pressures of all the constituents in the mixture.
Answer:
See explanation
Explanation:
We first obtain the mole fraction of propane at the start and end;
0.01 = x/0.62 + 0.28 + x
0.01[0.62 + 0.28 + x] = x
0.01[0.9 + x] =x
9 * 10^-3 + 0.0.1x = x
9 * 10^-3 = x - 0.0.1x
9 * 10^-3 = 0.99x
x = 9 * 10^-3/0.99
x = 9.09 * 10^-3
After
For methane
0.62/ 0.28 + 0.62 + 9.09 * 10^-3 = 0.68
For ethane
0.28/0.28 + 0.62 + 9.09 * 10^-3 =0.31
Change in partial pressure of methane = (0.68 - 0.62) * 100kPa = 6 kPa
Change in partial pressure of ethane = (0.31 - 0.28) * 100kPa = 3 kPa
Change in partial pressure of propane= (0.01 - 0.1) * 100kPa = -9 kPa
Which process occurs when sand particles settle out of the water or
wind and are deposited as sediment?
A. cementation B. photosynthesis
C. deposition
EASY!!!!! ILL MARK BRAINLIEST!!!!!!!!
why does measured current differ from calculated current
Answer:
No component is perfect. All have tolerances that can vary. If you construct a simple circuit where a 10 volt power supply feeds a 10 ohm resistor, you would expect to measure a current of one ampere. BUT - the wiring has some resistance too. This adds perhaps 0.1 ohms to the circuit. The resistor has a +-5% tolerance. If it is 5% high, it may measure 10.5 ohms. That's a total circuit resistance of 10.6 ohms. The power supply may have a tolerance of +-1%. Suppose it's 1% low. That's an output of 9.9 volts in real life. So you have 9.9 volts dropped across 10.6 ohms. you will measure closer to 0.934 amps instead of 1.000 amps. To make matters worse, most electronic components have a temperature coefficient, that is, their values change with different temperatures. You may get a completely different reading tomorrow if the temperature is different! Finally, with current measurements in particular, you are inserting the ammeter in series with the circuit under test. Ammeters have some inherent resistance too, so by putting the ammeter in the circuit, you are changing the very current you are trying to measure (a little)! Oh yeah, the ammeter has a tolerance too. Its reading may be off a little even if everything else is perfect. Sometimes you have to wonder how we get a decent reading at all. Fortunately the errors are usually fairly small, and not all tolerances are off in the same direction or off the maximum amount. They tend to cancel each other out somewhat. BUT - in rare circumstances everything CAN happen like I said, and the error can be huge.
Explanation:
Chemistry: Atoms and elements. having trouble figuring out how to find out what element these atoms represent any help will be apreciated.
Answer:
Elements are types of atoms that have a unique number of protons. In fact, from left to right, the periodic table is arranged by the number of protons that each element contains. oms make up matter. An atom is the smallest unit of matter that retains all of the chemical properties of an element.
Explanation:
7
Jacob has a bucket of ice. He covers the bucket with a lid and sets it in the sun. The ice melts into liquid water. How does the mass
of the ice compare with the mass of the water?
OA
The mass of the ice is less than the mass of the water
ОВ.
The mass of the ice is more than the mass of the water
OC.
The mass of the ice is the same as the mass of the water.
OD
There is no way to determine this from the information given.
Answer: (C) the same
Here's what I'm thinkin: Since the bucket has a lid, then no water was evaporated thus the mass wouldn't decrease. Also, Jacob didn't add any substances to the bucket of ice, so the mass wouldn't increase. You know? Sorry if this is wrong, but that's how I figured the answer.
Explanation:
Trust Milky. Milky smart.
why is cardboard, paper, or ceramic a better choice for coffee mugs?
What creates a bond dipole and how can you tell if a bond dipole exists?
Answer:
A dipole exists when there are areas of asymmetrical positive and negative charges in a molecule. Dipole moments increase with ionic bond character and decrease with covalent bond character.
Given two objects, the object with the _______________ mass will be pulled to the object with the _______________ mass.
Given two objects, the object with the least mass will be pulled to the object with the most mass.
Answer:
the answer is simple the object with the lower mass would be pulled to the object with the bigger mass
Explanation:
hope i helped
What is the chemical formula for oxygen tetrabromide?
When NH4SCN is added to a solution of Fe3+ ions, the solution changes from yellow to orange. What is the best explanation for this color change?
Answer:
The iron present in the solution is reduced because of the presence of SCN⁻ ions in solution
Explanation:
The clue in this problem is the color of the solution:
A solution of Fe³⁻ is yellow but when the Fe³⁺ is reduced by an oxidant to Fe²⁺ the solution change to orange color.
The SCN⁻ ion is a reducing agent than, in presence of a substance that can be reducted as Fe³⁺ ion will promote the reaction. That means the best explanation is:
The iron present in the solution is reduced because of the presence of SCN⁻ ions in solutionwhat are the oxides of oxygen
Answer:
Oxides are chemical compounds with one or more oxygen atoms combined with another element (e.g. Li2O). Oxides are binary compounds of oxygen with another element, e.g., CO2, SO2, CaO, CO, ZnO, BaO2, H2O, etc. These are termed as oxides because here, oxygen is in combination with only one element.
Explanation:
Answer:
Oxides are chemical compounds with one or more oxygen atoms combined with another element (e.g. Li2O). Oxides are binary compounds of oxygen with another element, e.g., CO2, SO2, CaO, CO, ZnO, BaO2, H2O, etc. These are termed oxides because here, oxygen is in combination with only one element.
How do the circulatory and the excretory systems work together to maintain the human body on a daily basis?
Answer:
The circulatory system brings blood through the kidneys where nitrogenous wastes can be filtered. The urinary system helps the circulatory system by maintaining salt balance in the body and adjusting blood pressure by getting rid of or holding on to more water.
Explanation:
Jason took 6 hours to travel 540 km. For the first 140 km, he took 2 hours.
What was his average speed during the first two hours? ___ km/h
How much distance did he cover in the last four hours of his journey? ___ km
What was his average speed for the rest of the journey? ___ km/h
Answer: Average speed for the first two hours was 70 km/hr
Covered 400 km in the last four hours
Average speed for the rest of the journey was 100 km/hr
Explanation: 140 km / 2 hours = 70 km/hr
540 km - 140 km = 400 km remaining for the last four hours
400 km / 4 hours = 100 km/hr for the last four hours
VSEPR theory is a model for predicting
a
the strength of metallic bonds
b
the shape of molecules
c
ionization energy
d
lattice energy values
You need to buy some shirts and pants for
school. Pants cost $20 each and shirts cost
$15 each. You have $120, and need to buy at
least 9 items.
Answer:
Explanation: I did the work online because I just worked on this.
According to the graphs, by what factor will the ocean's acidity change from 2005 to 2100?
A) 0.2
B) 0.5
C) 1.6
D) 2.2
Answer: C) 1.6
Explanation: I got it right
write the balance equation of ammonium sulfide + aluminum chloride
Answer:
3(NH4)2S + 2AlCl3 → 6NH4Cl + Al2S3
Explanation:
Firstly, ammonium sulfide has a chemical formula of (NH4)2S while aluminum chloride has a chemical formula of AlCl3. These two chemical substances react as follows:
(NH4)2S + AlCl3 → NH4Cl + Al2S3
This chemical equation is however, unbalanced. To balance the chemical equation, one has to ensure that the atoms of each element on both the reactant and product side equates with one another.
If we carefully observe each atom on both the reactants and product side, we will have the following balanced equation:
3(NH4)2S + 2AlCl3 → 6NH4Cl + Al2S3
That is;
- 6 moles of N and Cl on both sides
- 24 moles of H on both sides
- 3 moles of S on both sides
- 2 moles of Al on both sides
A Textbook of
Information
Technology
(Subject code 402)
What is Information technology??
Please don't post invalid answer..!!
Explanation:
Information Technology CBSE Code 402 for class IX and X is based on National Skills Qualifications Framework. The book is designed and structured to help learner acquire the knowledge and skills regarding conputers, office productivity tools and internet necessary in real life competitive worlf
A container with a mixture of water and ice is at 0°C What will happen if energy is added to or removed from the water?
Answer:
It will freeze or melt
Explanation:
Ice will melt if energy added
Water will freeze if energy removed
Calculate the approximate initial boiling point (in oC) of a solution of 285 g of
magnesium chloride in 2.0 kg of water. The kb of water is (0.52°C/m)
Answer:
do u take links bcs I can give u one with the answer?
The approximate initial boiling point of Magnesium chloride solution has been 102.33 degree Celsius.
The pure water has boiling point 100 degree Celsius. With the addition of the solvent, the boiling point has been increased. The change in the boiling point ([tex]\Delta T_b[/tex]) has been given as:
[tex]\Delta T_b=i.K_b.b[/tex]
Where, i has been the van't Hoff factor
[tex]K_b[/tex] has been the ebullioscopic constant
b has been the molality of the sample
The dissolution of magnesium chloride in water has been given as:
[tex]\rm MgCl_2\;(aq)\;\rightarrow\;Mg^2^+\;+\;2\;Cl^-[/tex]
The i has been the amount of molecules that has been formed by the dissociation of 1 molecule. The dissociation of Magnesium chloride has been resulted in the 1 Mg and 2 Cl. Thus, the i for Magnesium chloride has been 3.
The molality (m) of the solution has been given as:
[tex]m = \dfrac{m_s_o_l_u_t_e}{mwt}\;\times\;\dfrac{1000}{m_s_o_l_v_e_n_t}[/tex]
Where, [tex]m_s_o_l_u_t_e=285\;\text {g}\\m_s_o_l_v_e_n_t=2\;\text{kg}\\mwt=95.211\;\text{g/mol}[/tex]
Substituting the values, molality of the Magnesium chloride solution (b) can be given as:
[tex]b=\dfrac{285}{95.211}\;\times\;\dfrac{1}{2}\;\text{m}\\b=1.49\;\text{m}[/tex]
The molality of the solution has been 1.49 m.
Substituting the values for change in temperature:
[tex]\Delta T_b=3\;\times\;0.52\;\times\;1.49\;^\circ \text C\\\Delta T_b=2.33\;^\circ \text C[/tex]
The rise in boiling temperature with the addition of 285 g of Magnesium chloride has been 2.33 [tex]\rm ^\circ C[/tex]. Since, the initial temperature for pure solvent has been 100 degree Celsius.
The initial temperature of Magnesium chloride solution has been the sum of two. Thus:
[tex]\text {Initial temperature}=100^\circ \text C\;+\;2.33\;^\circ \text C\\\rm Initial\;temperature=102.33\;^\circ C[/tex]
The initial temperature of magnesium chloride solution has been 102.33 degree Celsius.
For more information about the boiling point, refer to the link:
https://brainly.com/question/2153588
In a chemical reaction between copper metal and silver nitrate, 12.7 g of copper(II) and 64.5 g of silver nitrate react, and 38.1 g of Silver is produced. 21) Predict the products and write the balanced equation and include the physical state of each. 22) What type of chemical reaction is this? 23) Which is the limiting reactant? You must include the work for this to receive full credit. 24) What mass of excess is used up, and what mass is left over? 25) Calculate the percent yield.
Answer:What should you do if you realize during research that your original theory is wrong
Explanation:
What is the pOH of a substance when [H+] = 5.4 x 10^-8 M
Answer:
pOH = 6.73
Explanation:
First, calculate pH = -log[H+] = -log(5.4 x 10^-8) = 7.27
pOH + pH = 14, so pOH = 14 - 7.27 = 6.73
PLLZZZZ HELPPPP IT IS A TIME ASSIGNMENT !!!
Answer:
plato is the answer
Explanation:
that what i think it it is
The slate tabletops in the schools science lab are made from rocks that were under very high temperature and pressure. In which category of rock can slate be placed?
A. Igneous
B. metamorphic
C. sedimentary
D. volcanic
Answer:
B. metamorphic
Explanation:
Rocks formed under high heat and pressure is essentially the definition of metamorphic rock :)
Qué sucede al disolver una tableta de ALKA-SELTZER en agua caliente?
Answer:
FREE POINTS CUZ I DON'T UNDERSTAND
Explanation:
PLEASE HELP DUE IN 1 hour PLS Moving from left to right across the periodic table, the shielding effect remains constant
within a period. Please explain why the shielding effect is constant. Limit your response
to one sentence. Use your own words to answer.
Answer:
Shielding effect is the decrease in the attractive force of the nucleus on tge valence electrons due to inner shell electrons. ... Shielding effect remains same across a period, that is because the number of shells are same for each element in a period. hope this helps!
A 34 kg child has 190 J of kinetic energy after sledding down a hill. What is the child’s velocity in meters per second at the bottom of the hill?
Answer: 3.34 meters
Explanation:
If the kinetic energy formula states that 1/2mv^2= KE then we are solving for v. We already know mass and Joules so the equation becomes
[tex]\frac{1}{2}[/tex](34)[tex]v^{2}[/tex]=190
17v^2=190
v^2=190/17
v=3.34
Solve for V
V=3.34
help!!!!please i need to get this done before 3pm!today
i need help!! i need to make it like 3:2
Answer:
use visual studio code and put in this print{3:2}-1
Explanation:
Can someone please help with this one question