Answer:
Explanation:
sedrftgyhutrfdcfgvbhytrfdcxf vgftcdxvgytfdrcf vbhgfc vgtfrdxvgfcdxc vgfcdxcvgfcf vfcdcx vgfcvgvfcvgfdcf vbgfccv bgf thanks
In the complex ion [Cr(C204)2(H20)2]-, what is the oxidation number of Cr?
O A. 3+
O B. 1+
O C.2+
OD. 2-
O E. 1-
Answer:
A. 3+
Explanation:
In the complex, the global charge is -1.
There are 2 molecules of H₂O but water is a neutral ligand that doesn't contribute any charge to the complex
In contrast, the C₂O₄ ligand has a charge of -2. As there are 2 C₂O₄, the charge is -4.
The -4 + The charge of Cr is equal to global charge of the complex ion = -1.
Thus, Cr has a charge of +3 and right answer is:
A. 3+Give the mechanistic symbols (SN1, SN2) that are most consistent with each other the following statements:a) Methyl halides react with sodium ethoxide in ethanol only by this mechanism.b) Unhindered primary halides react with sodium ethoxide in ethanol mainly by this mechanis.c) The substitution product obtained by solvolysis of tert- butyl bromide in ethanol arises by this mechanism.d) Reactions proceeding by this mechanism are stereospecfic.e) Reactions proceeding by this mechanism involve carbocation intermediates.f) this mechanism is most likely to have been involved when the products are found to have a different carbon skeleton from the substrate.g) Alkyl iodides react faster than alkyl bromides in reactions that proceed by these mechanisms.
Answer:
very comfusing
Explanation:
2. What structure produces bile?
3. What is the purpose of bile?
4. List the order food passes through your body.
5. List three accessory digestive organs.
Answer:
2. It is made and released by the liver and stored in the gallbladder
3. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract. So it helps with digestion
4. Order would go: Mouth. Esophagus. Stomach. The small intestine. Colon (large intestine) Rectum.
5. The salivary glands, liver, gallbladder, and pancreas are not part of the digestive tract, but they have a role in digestive activities and are considered accessory organs.
Explanation:
Bile is produced by the liver and held in the gallbladder before being released into the small intestine to aid in fat digestion. Food travels from the mouth to the esophagus, stomach, small intestine, large intestine, rectum, and anus, respectively.
Bile is a greenish-yellow fluid that is stored in the gallbladder and released into the small intestine when needed.
Answers to the given questions are as follows:
2. The structure that produces bile is liver produces bile.
3. The purpose of bile is to help digest fats in the small intestine.
4. The order that food passes through your body is mouth, esophagus, stomach, small intestine, large intestine (colon), rectum, and anus.
5. The three accessory digestive organs are the pancreas, gallbladder, and salivary glands.
Therefore, above are the mentioned answers to the given questions.
Learn more about Bile here:
https://brainly.com/question/34332563
#SPJ6
Help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Wave 2
Explanation:
Higher frequency means more energy per second, And wave 2 has higher frequesncy
please mark brainliest I’m almost at expert level
Answer:
I believe it is wave 2
Explanation:
As you can see in the graph, wave two happens to be more frequent. There are well, more waves than the first graph. Please forgive me if I am wrong. I tried my best to explain
a huge tank contains 80,000 liters of oxygen, at a pressure of 760mmHg. If the oxygen is to be replaced into cylinder of 20 liters capacity at a pressure of 3040mmHg, how many cylinders will be needed?
Which of the following is an example of a velocity?
30 miles per hour
30 miles per hour North
30 miles
30 hours
Answer:
30 miles per hour North
Explanation:
Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.
Mathematically, velocity is given by the equation;
[tex]Velocity = \frac{distance}{time}[/tex]
[tex]V = \frac{d}{t}[/tex]
Hence, 30 miles per hour North is an example of a velocity because it is a vector quantity that has both magnitude and direction.
Look at the diagram of a fuel cell used to power a motorized vehicle. A fuel cell with 2 vertical objects labeled A and B connected by an electrical wire through a circle with a M in it; that circle is labeled A. There is an area between the two vertical objects, and substances flowing to, along, and away from the vertical objects and to the left and right. Which part of the fuel cell does A represent? anode cathode electrolyte motor
Answer: Its D. motor
Explanation:
TRUST ME ITS RIGHT
A fuel cell is an electrochemical device that generates electricity through reactions. A represents the electrolyte of the cell. Thus, option c is correct.
What is an electrolyte?
An electrolyte is a solution capable of conducting electricity through them because of its charged particle nature. The dissolved salts and ions are the carriers of electricity.
Anode and cathode are the two plate terminal that is charged and attracts the oppositely charged particles dissolved in the solution to conduct the electricity. The motor converts the energy onto electricity.
Therefore, option c. labeled part A is an electrolyte.
Learn more about electrolytes here:
https://brainly.com/question/16193219
#SPJ2
Predict the molecular geometry about N in the molecule CH3NHCH3
A. linear
B. trigonal pyramidal
C. bent
D. trigonal planar
The molecular geometry about N in the molecule CH3NHCH3 is trigonal pyramidal. Therefore, option B is correct.
What is molecular geometry ?The three-dimensional arrangement of the atoms that make up a molecule is known as molecular geometry. It includes the molecule's general shape as well as bond lengths and bond angles.
A molecule is trigonal planar if it has three bonds and no lone pairs. A molecule is bent or angular if it has three bonds and one lone pair. Tetrahedral molecules have four bonds and no lone pairs. A molecule is trigonal pyramid if it has four bonds and one lone pair.
Three of the five nitrogen electrons in NH3 are involved in bonding with three hydrogen atoms, while the unbounded two electrons form the single unshared pair of electrons. Ammonia has a trigonal pyramidal shape due to this lone pair.
Thus, option B is correct.
To learn more about molecular geometry, follow the link;
https://brainly.com/question/7558603
#SPJ5
How much voltage does 4 oranges produce?
Answer:
For generating electricity, there must be a power source present and a total circuit. In order to generate electricity from citcrus fruit circuit, it is necessary to have materials like wire, a small bulb, lemon fruit, and two metal elements. The power source in this circuit is the lemon fruit. The metals that are taken here in this experiment are zinc and copper.
Explanation:
The force that gravity exerts on an object is
Question 7 options:
It's Acceleration
It's Weight
It's Mass
Constant
Answer:
gravity exerts on it's mass brother
If pollution near factories was reduced, what
would happen to the color of the moths
Answer:
It would most likely just change their color
Explanation: The frequency of dark-coloured moths increased at that time, an example of industrial melanism. Later, when pollution was reduced, the light-coloured form again predominated. ... The dark-coloured or melanic form of the peppered moth
If pollution near factories was reduced, then this situation increased the frequency of white moths.
What is industrial melanism?Industrial melanism is an evolutionary feature associated with the increase of dark moths in industrial polluted areas.
Industrial melanism is an adaptation to survive these industrial conditions.In conclusion, if pollution near factories was reduced, then this situation increased the frequency of white moths.
Learn more about industrial melanism here:
https://brainly.com/question/15283847
#SPJ2
what is the dispersing medium in a colloid??
Explanation:
A colloid is a heterogeneous mixture whose particle size is intermediate between those of a solution and a suspension. The dispersed particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas.
Help needed urgently
the word missing or partially seen is oxygen I forgot to put more pointa
Explanation:
2.04 % hydrogen
32.65% sulphur
65.31% is oxygen
atomic ratio
hydrogen =2.04÷1=2.04
sulphur =32.65÷32=1.02
oxygen =65.31÷16=4.08
simplest ratio
hydrogen = 2.04÷1.02=2
sulphur =1.02÷1.02=1
oxygen =4.08÷1.02=4
empirical formula is H2SO4
A sample of ammonium phosphate, (NH4)3PO4, contains 0.104 mol of nitrogen atoms. The number of moles of oxygen atoms in the sample is
Answer:
There are 0.1387 moles of oxygen atoms.
Explanation:
First we calculate how many moles of ammonium phosphate there are:
There are 3 nitrogen moles per (NH₄)₃PO₄ mole.There are 0.104 nitrogen molesThus there are (0.104 mol N * [tex]\frac{1mol(NH_4)_3PO_4}{3molN}[/tex]) 0.0347 moles of (NH₄)₃PO₄.Finally we calculate how many moles of oxygen atoms are there in 0.312 moles of (NH₄)₃PO₄:
There are 4 oxygen moles per (NH₄)₃PO₄ mole.There are 0.0347 moles of (NH₄)₃PO₄.Thus there are (0.0347 mol (NH₄)₃PO₄ * [tex]\frac{4molO}{1mol(NH_4)_3PO_4}[/tex] ) 0.1387 moles of O.
The number of moles of oxygen atoms in the sample is 0.1388 mole
We'll begin by calculating the number of mole of (NH₄)₃PO₄ that contains 0.104 mole of N. This can be obtained as follow:
3 moles of N is present in 1 mole of (NH₄)₃PO₄.
Therefore,
0.104 mole of N will be present in = 0.104 / 3 = 0.0347 mole of (NH₄)₃PO₄.
Finally, we shall determine the number of oxygen atoms in the sample1 mole of (NH₄)₃PO₄ contains 4 mole of O.
Therefore,
0.0347 mole of (NH₄)₃PO₄ will contain = 0.0347 × 4 = 0.1388 mole of O
Thus, the number of moles of oxygen atoms in the sample is 0.1388 mole.
Learn more: https://brainly.com/question/11907810
3.
Which of the following statements is correct?
X Х
1. doubling the pressure of a gas doubles its volume
2. 2.00 L of air at 227°C has twice the pressure of the same 2.00 L of air at -
23°C
3. 2.00 L of air at 100°C has twice the pressure of the same 2.00 L of air at
50°C
4 halving the pressure of a gas halves its volume
Answer:
3. 2.00 L of air at 100°C has twice the pressure of the same 2.00 L of air at 50°C
Explanation:
3. 2.00 L of air at 100°C has twice the pressure of the same 2.00 L of air at 50°C
This is correct;
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles thus, by increasing the temperature pressure is also goes to increase in the same ratio.
All other options are incorrect,
1) doubling the pressure of a gas doubles its volume
This is incorrect because by increasing the pressure volume is going to be decreased.
2) 2.00 L of air at 227°C has twice the pressure of the same 2.00 L of air at 23°C
This is also incorrect because 2 L air at 227 °C will have the pressure more than twice time as compared to the 2L air at 23°C.
4. halving the pressure of a gas halves its volume
This is incorrect because halving the pressure of gas increasing its volume.
write any three porperties of solid
Answer:
A solid has a definite shape and volume.
A solid has a definite shape and volume.Solids in general have higher density.
A solid has a definite shape and volume.Solids in general have higher density.In solids, intermolecular forces are strong.
A solid has a definite shape and volume.Solids in general have higher density.In solids, intermolecular forces are strong.Solids have high melting points.
Answer:
Any 3 properties of solid are as follows
Explanation:
It has higher density.It has definite shape and volume.It has high melting point.how it is this???????
Answer:
1) Helium (2 electrons)
2) Neon (10 electrons)
3) Argon (18 electrons)
4) Krypton (36 electrons)
The rate of consumption of B in the reaction A + 3 B → C + 2 D is 2.7 mol dm−3 s−1. State the reaction rate, and the rates of formation or consumption of A, C, and D.
Answer:
[tex]\frac{1}{-1} \frac{d[A]}{dt} =\frac{1}{-3} \frac{d[B]}{dt}=\frac{1}{1} \frac{d[C]}{dt}=\frac{1}{2} \frac{d[D]}{dt}[/tex]
[tex]\frac{d[A]}{dt} =-0.9\frac{mol}{dm^3*s} \\\\ \frac{d[C]}{dt} =0.9\frac{mol}{dm^3*s}\\\\ \frac{d[D]}{dt} =1.8\frac{mol}{dm^3*s}[/tex]
Explanation:
Hello!
In this case, since the reaction rate for all the species are written by considering how they change and the coefficients they have in the reaction, for A, B, C and D we can write:
[tex]\frac{1}{-1} \frac{d[A]}{dt} =\frac{1}{-3} \frac{d[B]}{dt}=\frac{1}{1} \frac{d[C]}{dt}=\frac{1}{2} \frac{d[D]}{dt}[/tex]
Whereas the numeric denominators stand for the coefficients balancing the reaction. In such a way, by using the rate of consumption of B, we can compute the rate of consumption of A and the rates of formation of both C and D as follows:
[tex]\frac{d[A]}{dt} =\frac{-1}{-3} \frac{d[B]}{dt}=\frac{1}{3}*-2.7\frac{mol}{dm^3*s} \\\\ \frac{d[A]}{dt} =-0.9\frac{mol}{dm^3*s} \\\\\\ \frac{d[C]}{dt} =\frac{1}{-3} \frac{d[B]}{dt}=\frac{1}{-3}*-2.7\frac{mol}{dm^3*s} \\\\ \frac{d[C]}{dt} =0.9\frac{mol}{dm^3*s}\\\\\\ \frac{d[D]}{dt} =\frac{2}{-3} \frac{d[B]}{dt}=\frac{2}{-3}*-2.7\frac{mol}{dm^3*s} \\\\ \frac{d[D]}{dt} =1.8\frac{mol}{dm^3*s}[/tex]
Whereas the rates of consumption are negative and the rates of formation positive.
Best regards!
Help needed urgently
Answer:
Empirical formula = CH3O
Molecular formula = C2H6O2
How does the composition of the object to figure a differ from the objects shown in figure be name the object
Answer:
A is a Comet, B is an asteroid
Explanation:
:X
What is weathering?
A.
the process by which sediment is compacted into rock
B.
the process by which rocks are broken down into sediment
C.
the process by which sediment is transported from one place to another
D.
the process by which sediment is deposited and built up into landforms
Answer:
B.
the process by which rocks are broken down into sediment
g Which of the following describe chemical properties of hydrogen gas (H2)? At room temperature its density is less than any other gas. It reacts vigorously with oxygen to form water. Liquefied H2 boils at a very low temperature (-253oC). Both b and c are chemical properties.
Answer: It reacts vigorously with oxygen to form water.
Explanation:
Physical property is defined as the property of a substance which becomes evident during physical changes.
Example: At room temperature its density is less than any other gas.
Liquefied [tex]H_2[/tex] boils at a very low temperature [tex](-253^oC)[/tex]
Chemical property is defined as the property of a substance which becomes evident during chemical changes. These properties are defined when a substance undergo changes in bonding of atoms.
Example: It reacts vigorously with oxygen to form water.
When a living organism is successful in meeting all its needs ,this is called
A.active transport
B.endocytosis
C.homeostasis
D.exocytosis
Answer:
homeostasis
Explanation:
source Wiki
In biology, homeostasis (or “health”) is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Other variables include the pH of extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life.
How many milliliters of an aqueous solution of 0.193 M potassium carbonate is needed to
obtain 7.90 grams of the salt?
Answer:
295 mL
Explanation:
Given data:
Volume needed = ?
Molarity of solution = 0.193 M
Mass of salt = 7.90 g
Solution:
Molarity = number of moles of solute / volume in L
Number of moles of salt = mass/molar mass
Number of moles of salt = 7.90 g/ 138.205 g/mol
Number of moles = 0.057 mol
Volume needed:
Molarity = number of moles / volume in L
0.193 M = 0.057 mol / volume in L
Volume in L = 0.057 mol / 0.193 M
Volume in L = 0.295 L
L into mL
0.295 L × 1000 mL/1L
295 mL
Do you think science will end the world or save the world or do neither?
Answer:
This is all up to you
Explanation: This question is up to you because you may think both or just one.
Which are ways to ensure that temperature readings are accurate? Check all that apply. -shaking the thermometer before use
-using the thermometer as a stirring rod
-making sure the liquid inside the thermometer is at eye level when taking the temperature
- making sure the bulb of the thermometer does not touch the bottom of the beaker or the ice when taking the temperature
-using the Celsius scale instead of the Fahrenheit scale when taking temperature readings
Answer: making sure the liquid inside the thermometer is at eye level when taking the temperature.
making sure the bulb of the thermometer does not touch the bottom of the beaker or the ice when taking the temperature
Explanation:
A thermometer is a device that's used to know the temperature of individuals. In order to ensure the accuracy of the readings in a thermometer, it is vital to making sure the liquid inside the thermometer is at eye level when taking the temperature.
Also, one should make sure the bulb of the thermometer does not touch the bottom of the beaker or the ice when taking the temperature.
The thermometer should not be used as a stirring rod. One should not shake it or play with it. Also, using either Celcius or Fahrenheit doesn't really matter.
Not every practice is accepted in temperature reading and these are the practices that apply are
Making sure the liquid inside the thermometer is at eye level when taking the temperature.Making sure the bulb of the thermometer does not touch the bottom of the beaker or the ice when taking the temperature.Option C and Option D are correct Ways to ensure that temperature readings are accurate while using a thermometerGenerally, The essential precautions that need to be taken when the using of thermometer encompass the following:
Do not use a thermometer as a stirring instrument,
Make positive that the liquid interior the thermometer is at eye stage when taking the temperature reading
Do not swing or shake down a thermometer reading
Therefore,the ways that apply are
Making sure the liquid inside the thermometer is at eye level when taking the temperature.
Making sure the bulb of the thermometer does not touch the bottom of the beaker or the ice when taking the temperature.
Option C and D are correct
For more information on Temperature
https://brainly.com/question/13439286
Click the links to open the resources below. These resources will help you complete the assignment. Once you have created your file(s) and are ready to upload your assignment, click the Add Files button below and select each file from your desktop or network folder. Upload each file separately.
Your work will not be submitted to your teacher until you click Submit.
Documents
Constructing a Device to Regulate the Release of Energy - Student Guide
Constructing a Device to Regulate the Release of Energy - Rubric
File Upload
Accepted file types: .ppt, .pptx, .xls, .xlsx, .doc, .docx, .zip, .pdf, .accdb, .msg
Answer:
I am not able to click anything above!
This infected cut has activated an ________ response
inflammatory
O pathogens
O skin
Answer:
Inflammatory
Explanation:
I've been stuck on this problem for 23456789 minutes please help!!
Answer:
C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂
Explanation:
Given:
C₄H₆O₃ + H₂O ⇒ C₂H₄O₂
Find:
Balance equation
Computation:
C₄H₆O₃ + H₂O ⇒ C₂H₄O₂
C₄H₆O₃ + H₂O ⇒ 2C₂H₄O₂
Number of atom should be equal in LHS and RHS.
So,
We have to multiply 2 in RHS to get equal number of atom.
Want some points??
Answer:
yea i do
Explanation:
LETSSS GOOOOOO