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:
What is the correct answer based on sig figs for the following 4.2787 x 2.27= 9.712649
A. 9.712649
B. 9.7126
C. 9.7
D. 9.71
Answer:
a that all you need and why you just and use a calculators and what they are for
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
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
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 solutionGiven 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
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 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
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.
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
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 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.
A solution has a volume if 259 mL and contains 0.70 mol MaCl. What is its molarity
Answer:
2.8 m
Explanation:
:)
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
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
why is cardboard, paper, or ceramic a better choice for coffee mugs?
YOU ARE AMAZING AND YOU ARE SO IMPORTANT HAVE A GOOD DAY!
Answer:
Thx Have a fantastic day! :)
Explanation:
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 :)
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
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
Qué sucede al disolver una tableta de ALKA-SELTZER en agua caliente?
Answer:
FREE POINTS CUZ I DON'T UNDERSTAND
Explanation:
Scientists are now able to use the genetic code of organisms to find out more about their evolutionary history. How is this most likely to impact classification
The group of choices associated with the given question are as follows:
Organisms once thought to be unrelated may be found to be related.
Mode of nutrition of some organisms may change.
Organisms that do not have a backbone may develop one.
All multicellular organisms may be found to be prokaryotes
Answer:
The correct answer would be - Organisms once thought to be unrelated may be found to be related
Explanation:
Classification of the organisms is based on the shared characteristics and structural or environmental similarities of the organisms which are modified and evolved during the period of time. It is also known as life sciences evolve and genetic code provides more accurate information.
These evolutionary changes and will lead to certain organisms that are once thought to be unrelated organisms that may actually be related based on a genetic code. These codes have every small and accurate change that occurs and can also find out when these changes occured.
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
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.
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!
If two moles of chlorine gas reacts with potassium iodine, how many grams of potassium chloride are produced?
help!!!!please i need to get this done before 3pm!today
In general, the Hippocratic Oath requires physicians to do all of the following EXCEPT which action?
treat every ill patient
do no harm
help their patients as best they can
maintain the privacy of their patients
Answer:
Physicians do not have to treat every ill patient. However they must uphold their ethics (eg. do no harm, confidentiatlity, etc.).
Explanation:
Primary source:
Hippocratic Oath (translation since it's originally in Greek)
I swear by Apollo the physician, and Asclepius, and Hygieia and Panacea and all the gods and goddesses as my witnesses, that, according to my ability and judgement, I will keep this Oath and this contract:
To hold him who taught me this art equally dear to me as my parents, to be a partner in life with him, and to fulfill his needs when required; to look upon his offspring as equals to my own siblings, and to teach them this art, if they shall wish to learn it, without fee or contract; and that by the set rules, lectures, and every other mode of instruction, I will impart a knowledge of the art to my own sons, and those of my teachers, and to students bound by this contract and having sworn this Oath to the law of medicine, but to no others.
I will use those dietary regimens which will benefit my patients according to my greatest ability and judgement, and I will do no harm or injustice to them.
I will not give a lethal drug to anyone if I am asked, nor will I advise such a plan; and similarly I will not give a woman a pessary to cause an abortion.
In purity and according to divine law will I carry out my life and my art.
I will not use the knife, even upon those suffering from stones, but I will leave this to those who are trained in this craft.
Into whatever homes I go, I will enter them for the benefit of the sick, avoiding any voluntary act of impropriety or corruption, including the seduction of women or men, whether they are free men or slaves.
Whatever I see or hear in the lives of my patients, whether in connection with my professional practice or not, which ought not to be spoken of outside, I will keep secret, as considering all such things to be private.
So long as I maintain this Oath faithfully and without corruption, may it be granted to me to partake of life fully and the practice of my art, gaining the respect of all men for all time. However, should I transgress this Oath and violate it, may the opposite be my fate.
HELP PLEASE Which type of power generation can produce carbon dioxide? solar hydroelectric coal wind
Answer:
COAL
Explanation:
Answer:
Coal!
Explanation:
Hope this helps!
