If you need to design a technological solution to lack of water availability in a developing country, which of the following should you do before proposing a solution? invest the money to test your most promising design select the best of several possible designs build a model to test research scientific principles involved in water availability

Answers

Answer 1

Anwser:

Research scientific principles involved in water availability.

Explanation:

Before building or investment you always want to see and know what your up against and what the best way to help or solve is. Researching why there's a problem in water availability or/and the principals to water availability will help you see what the problem is with what's happening to and around the process and it's environment.


Related Questions

If 22.5 L of nitrogen at 748.3 mm Hg is changed to a pressure of 1294.6 mm Hg at constant
temperature. What is the new volume?

Answers

Answer:

it down their!!!!!!!!!!1

Explanation:

The new volume  

=

23.2

L

8) Structures that regulate which molecules,
nutrients, and substances enter the cell are
A) Genes
B) Endoplasmic Reticulum
C) Cell Membranes
D) Centrioles

Answers

It is C the cell membranes :)

Did all the silver ions get consumed in the reaction? The molar mass of silver is 107.87 g/mol. Justify your answer.

Answers

This problem is asking for the consumption of silver ions when silver nitrate is reacted with copper. In such a case, since no masses are given, we can use the following from similar problems:

Mass of empty beaker: 110.000 g

Mass of beaker with silver nitrate (after all additions) and copper: 331.634 g.

Mass of beaker with silver: 113.395 g.

This means we can write the following chemical equation:

[tex]Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag[/tex]

And thus calculate the mass of silver nitrate that will produce the following mass of silver:

[tex]m_{Ag}^{produced}=113.395g-110.000g=3.395g[/tex]

Next, we use the 2:2 mole ratio of silver to silver nitrate (silver ions source):

[tex]3.395gAg*\frac{1molAg}{107.87gAg}*\frac{2molAgNO_3}{2molAg} *\frac{169.87gAgNO_3}{1molAgNO_3} = 5.35gAgNO_3[/tex]

The step will be defined for the given mass of available silver nitrate which will be compared to 5.35 g (consumed mass) to see if they are the same (all consumed) or different (partial consumption).

Learn more:

https://brainly.com/question/22031122https://brainly.com/question/2607181https://brainly.com/question/16965188

Write and balance the equation for the complete combustion of heptane, C7H16. Phase symbols and energy changes are optional.

Answers

The balanced equation for the complete combustion of heptane, [tex]C_{7}H_{16}[/tex] is given as,

[tex]C_{7}H16(g) + 11O_{2} (g)[/tex] → [tex]7CO_{2}(g) + 8H_{2}O(g)[/tex] + heat/light

What is combustion reaction?It is exothermic redox chemical reaction.The reaction between fuel and oxidant to produce oxidized product is called combustion reaction.The oxidant are usually atmospheric oxygen.The oxidized product is carbon dioxide gas and water.

What is balanced chemical equation?

The chemical equation in which number of atom each elements is equal in reactant and product of the reaction is called  balanced chemical equation.

To learn more about combustion reaction,

https://brainly.com/question/12172040

#SPJ2

All participants in the Genius dog challenge are border collies which some experts think are the what breed of dog?

Answers

As far as the intelligence of canines, it is widely accepted as a fact that the Border Collie is the most intelligent breed of dog.

The conclusion that border collies are the most intelligent breed of dog is credited to a canine psychologist by the name of Stanley Coren. He studied over 138 recognized breeds of dogs to measure the ease with which they learned new commands and the obedience rate of each breed.

Coren studies the learning and obedience of Border Collies over the course of 199 trials and found that this breed of dog performed 95% better than most other breeds, with only 9 of the 138 breeds studied coming close to the results of the border collie. Easily earning the title of the most intelligent breed of dogs.

To learn more visit:

https://brainly.com/question/9404831?referrer=searchResults

Write the formula of the conjugate base of C6H5SH.

Answers

Answer:

C6H5S^-

Explanation:

This is because you are removing the hydrogen to make it a conjugate base.

The formula for conjugate base of C6H5SH is C6H5S⁻.

What is conjugate base?

Conjugate base is defined as the substance which is formed when an acid liberate its protons.

The acid donate protons and the acid changes into base.

Conjugate acid is defined as the pair of compound that differs by its protons by gaining protons.

Conjugate acid and base are based in acid base theory.

Thus, the formula for conjugate base of C6H5SH is C6H5S⁻.

To learn more about conjugate base, refer to the link below:

https://brainly.com/question/12883745

#SPJ2

A reaction mixture initially contains 0.236 mol FeS and 0.670 mol HCl. Once the reaction has reached completion, what amount (in moles) of the excess reactant is left

Answers

Answer:

= 0.198 mole H₂S in excess

Explanation:

A quick way to determine limiting reactant is to convert reactant values given to moles and divide by respective coefficient. The smaller value is the limiting reactant other reactants will be in excess. However, when working problem, use mole values given to solve, not results of division.

       FeS         +        2HCl          => FeCl₂ + H₂S

0.236mole/1      0.670mole/2

   = 0.236             = 0.335

limiting reactant is FeS; HCl will be in excess.

Problem solution

0.236mole FeS used + 2(0.236 mole HCl used)

=> 0.236 mole FeCl₂ + 0.236 mole H₂S + (0.670 - 0.472) mole HCl in excess or, 0.198 mole H₂S in excess.

Hope this helps.    :-)

can someone tell me how to find moles in acid&base equations (simple explination pls)​

Answers

Answer:

When the base neutralizes the acid, the number of moles of H+ = the number of moles of OH-. Therefore, the number of moles of H+ = 0.0125 moles. Every mole of HCl will produce one mole of H+; therefore, the number of moles of HCl = number of moles of H+. The concentration of the HCl is 0.25 M

some uses of sodium bicarbonate​

Answers

Answer:

Sodium bicarbonate is an antacid used to relieve heartburn and acid indigestion. Your doctor also may prescribe sodium bicarbonate to make your blood or urine less acidic in certain conditions. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Identify the major ionic species present in an aqueous solution of C6H12O6 (glucose).
A. 6 C-
, 12 H+
, 6 O–
B. 6 C+
, 12 H+
, 6 O2–
C. 6 CH2+, 6 O2–
D. C6
+
, 12 H+
, 6 O2–
E. no ions are present

Answers

Glucose is a molecular substance therefore, there are no ionic species in glucose.

Ionic substances dissolve in water to yield ions. Molecular substances do not produce ions in solution. The conductivity of ionic solutions owes to the presence of ions in solutions. Molecular solutions do not conduct electricity due to the absence of ions.

Glucose is a molecular substance hence they are are no ions present hence glucose does not conduct electricity.

Learn more:  https://brainly.com/question/13440572?

NEED ANSWER ASAP!! will give brainlist

Which best explains why nanofiltration is an important new technology?

A. It can be used to help regions that have a short supply of usable water.
B. It can be used as an energy source to produce electricity in regions with limited coal.
C. It recycles wastewater to be reused for geothermal energy.
D. It collects solar energy to generate electrical power.

Answers

Explanation:

Our Direct Nanofiltration (dNF) membranes offer the unique combination of a low fouling hollow fiber configuration with the ability to remove organics and salinity (hardness) from water in one simple step. Other than a strainer, no further pre-treatment is required. We manufacture our membranes with a patented layer-by-layer process, where multiple nano-scale layers are deposited on a membrane support. This method enables very precise and controlled rejection and flux properties of the membrane. A unique solution for troubled water.

The primary role of coenzyme A in aerobic respiration is to



A. speed up the citric acid cycle.
B. transport electrons to FAD
C. kick off the transport electron cascade.
D. activate acetyl CoA and other molecules in the citric acid cycle.​

Answers

Answer:

I could be wrong but i believe the answer is D. It was not B when i took the test

Explanation:

What is the molarity of Ca(NO3)2 in a solution resulting from mixing 150.0 mL of 0.200 M HNO3 with 150.0 mL of 0.0100 M Ca(OH)2

Answers

The molarity of the Ca(NO3)2 solution would be 0.005 M

First, let us look at the balanced equation of the reaction:

[tex]2HNO_3+Ca(OH)_2 ---> Ca(NO_3)_2+2H_2O[/tex]

The mole ratio of HNO3 to Ca(OH)2 is 2:1.

Mole of HNO3 = molarity x volume

                            = 0.2 x 150/1000

                              = 0.03 mole

Mole of Ca(OH)2 = 0.01 x 150/1000

                             = 0.0015

Thus, there is no limiting or excess reactant.

Also from the equation, mole ratio of Ca(OH)2 to Ca(NO3)2 is 1:1. Hence, the mole of Ca(NO3)2 would also be 0.0015 mole.

The total volume of the resulting solution would be: 150 +150 = 300 mL

Thus, the molarity of the resulting Ca(NO3)2 would be:

Molarity = mole/volume

              = 0.0015/0.3

               = 0.005 M

More on molarity can be found here: https://brainly.com/question/12127540

Identify the six parts of the DNA molecule.

Answers

A) adenine B) thymine C) Sugars D) Phosphate E) Guanine F) Cytosine

The six parts of DNA serially are A) adenine B) thymine C) Sugars D) Phosphate E) Guanine F) Cytosine.

What is DNA?

DNA  is a hereditary material  which is present in human beings as well as all other living organisms.  Every cell which is present in an organism's body has DNA  which is the same. Most of the DNA is situated in the cell's nucleus and small amount of it can be found in the cell's mitochondria as well.

Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.

DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule  and a phosphate group. A base, phosphate sugar are together called as nucleotides.

Learn more about DNA,here:

https://brainly.com/question/28481425

#SPJ2

Hydrocarbons (alkanes, alkenes, alkynes) have all the properties below except one.

Which is not a property of hydrocarbons?

A.nonpolar
B.high melting and boiling points
C.insoluble in water
D.flammable

Answers

Answer:

B

Explanation:

The answer is B. All hydrocarbons are nonpolar, they are insoluble in water and they are highly flammable. Now, not all hydrocarbons have high boiling and melting point. For example, methane (CH4) has a boiling point of something clode to -161°C, and that is low. The boiling point increases when the number of carbon atoms in a compound increases, and based on methane and this theory, not all hydrocarbond have a high boiling point. This makes option B be the correct answer.

A piece of potato had an original mass of 3.2g and after being left in a sugar solution for 24 hours it then had a mass of 2.8g. Calculate the percentage mass decrease of the potato.

Answers

Answer: -13% to 3 sig figs

Explanation:

A piece of potato had an original mass of 3.2g and after being left in a sugar solution for 24 hours it then had a mass of 2.8g. Calculate the percentage mass decrease of the potato.

the change in mass is 2.8 -3.2 = -0.4 gm

the % change fro  the origial piece is ( -0.4/3.2) X 100 = -12.5%

or  -13% to 3 sig figs

which of the following statements is true?
just look at the picture ​

Answers

c

Explanation:

compounds are combine from two or more elements

physical and chemical changes occur in digestion. What is an example of an physical change in digestion
teeth chewing food
acid mixing with food
saliva mixing with food
enzymes mixing with food

Answers

Answer:

teeth chewing food

Explanation:

When teeth chews food it change its state from hard solid to fine substance that can be easily digested by the body i guess

The collision theory state that?

Answers

Answer:

Collision theory states that molecules must collide to react. For most reactions, however, only a small fraction of collisions produce a reaction.

Which of the above reactions is NOT an oxidation-reduction (redox) reaction?


A.First (blue)

B.Third (white)

C.Fourth (purple)

D.Fifth (pink)

E.Second (red)

Answers

Explanation:

I think third(white) isn't a redox reaction

how many grams of C2H5OH would get if you started with 5.0 g

Answers

Answer:

92.13688 grams

the farm is a place where lot's of different__________and________live.goats have________that arch backward.the horns keep them___________.


horns insects animals protected


dog's are man's best friend.dogs eat ______to keep them energetic.dogs permanent__________are ________.a dogs teeth serve as _______and as tools for ________or________food


meat cutting powerful teeth weapon tearing​

Answers

Answer:

plantsanimalshornsto protect it selfkaleliving with peoplescaring itspecialbite eat

Explanation:

I know it's right, because this answer is from my self and I hope it's help to us. keep learning and God bless.

How many grams are in 0.39 moles of water

Answers

Answer:   7.025959200000001

Explanation:

When 0.005 moles of silver(1) nitrate reacts with sodium carbonate, which of the following statement is correct?
(You must show all your work)

A) This is a redox reaction

B) This is a precipitation reaction and 0.69 g of the precipitate will be formed

C) This is a precipitation reaction and 1.38 g of the precipitate will be formed

D) This is a precipitation reaction and 0.83 g of the precipitate will be formed​

Answers

Explanation:

no sé de qué me estás hablando

This is a precipitation reaction and 1.38 g of the precipitate will be formed is the statement is correct. Hence, option C is correct.

What is a precipitation reaction?

A precipitation reaction is when two or more dissolved chemicals combine to form one solid products. The exchange of ions between ionic compounds in aqueous solutions is a common component of these reactions, which are also occasionally referred to as double displacement, double replacement, or metathesis reactions.

in response to precipitation a process that converts soluble salts into solids that are insoluble in water. a neutralizing response an interaction between an acid and a base that results in the production of salt, water, and an ionic molecule.

Precipitate refers to a solid that forms from a solution. The blending of two transparent solutions is a common example: NaCl in combination with silver nitrate The answer is. The soli cannot be dissolved in water.

Thus, option C is correct.

For more information about precipitation reaction, click here:

https://brainly.com/question/24158764

#SPJ2

2. What is the temperature (°C) of 1.50 moles of gas stored in a 10.0 L container at 1558 mm
Hg? (R=0.082 L atm/ mol K, 1.00 atm = 760 mm Hg
(4 points)

Answers

Answer:

-106°C

Explanation:

1558 mmHg / 1 × 1 atm / 760. mmHg = 2.05 atm

PV = nRT

2.05 atm (10.0 L) = 1.50 mol (0.082 atmL/molK) T

20.5 atmL = (0.123 atmL/K) T

K/0.123 atm L × 20.5 atmL = (0.123 atmL/K) T × K/0.123 atmL

166.666 K = T

167 K = T (sig figs)

K = °C + 273

167 - 273 = °C - 273

-106 = °C

Paano mo mapapanatili na gumagana ang iyong negosyo sa gitna ng pandemic na ito?​

Answers

Tingnan ang pinakamahuhusay na kagawian at patnubay sa pampublikong kalusugan para mapanatiling ligtas ang iyong mga customer at tauhan.

HOPE IT HELPS:)

PLS FOLLOW:)

#BRAINLIEST

dentify the parts of the atom that are labeled in the diagram.

Answers

Answer:

Our current model of the atom can be broken down into three constituents parts – protons, neutron, and electrons. Each of these parts has an associated charge, with protons carrying a positive charge, electrons having a negative charge, and neutrons possessing no net charge.

Relate microscopic bonding properties to solid state properties

Answers

There are many factors that we can take into account when attempting to relate microscopic bonding properties to solid-state properties, for example, the rigid and immobile nature of solid states and their molecular bonds.

Solid-state properties are simply put, the properties we can observe and measure when studying an element in solid form. These solids have specific characteristics such as:

Structural rigidityThey do not change shapeDo not change the volume they occupy

and so on, which although not initially obvious, are caused by the microscopic molecular bonds of their atoms.

The microscopic properties of solids are very similar to that of the solid-state properties. The atoms of a solid are very close together and strongly bonded to one another, because of this the atoms form a very rigid structure that resists changes to their shape or volume, much like the macroscopic properties of the solid. This serves to show how these properties may cause the solid-state effects we can observe normally.  

To learn more visit:

https://brainly.com/question/4833954?referrer=searchResults

help me. correct answer will be marked as brnlst

Answers

Answer:

You are correct it is NaCl

please help me I cant remember the parts of the flower and I really need help.

Answers

Answer

A: stigma
B: style
C: Anther
D: Filament
E: ovule
Other Questions
A sample of polonium-210 was left for 414 days.BAAfter this time it had a mass of 1.45 x 10^-4 gThe half-life of polonium-210 is 138 days.Calculate the initial mass of the sample Can someone tell me the answer and how did you get it please !!! outlook 365 can be described as a personal information manager true or false 0.5 10.2 If you solve this, can you show the steps of this equation? 1. Who is very excited about having bunk beds? Counting by 7s in what ways can the nurse provide culturally sensitive nursing care? provide two or three examples. in his book, blank claimed that his account of the Peloponnesian War was factual because it relies on the accounts of blank?First To Answer Correctly Gets Brainliest!!!! Kacie swam for 12 hours this week at YMCA pool. 25% of her pool time was spent on tree swim. The rest was in swimming classes. How many hours did Kacie spend in swimming classes? Given the value of cosine, Cos 0=1/5Find the value of sine Sin(0)= How is the principle of popular sovereignty related to the principles of a republican form of government and limited government ? Los culpados por crear La Boicotizadora fueron:a. Los independentistasb. Los anexionistasc. Los liberalistasd. Los autonomistas Help show work please. how do you think the natural condition of landform and climate have contributed to diversity in the Nepalese lifestyles? if 14 karat gold necklace weighs 1.8 ounces how many ounces of pure gold does it contain The Adventure of the speckled band film vs movie answer this questtion the fiah population in crystal lake increased thisnyear by 30% last year population in crystal land was 3,500 how many fish are jn the lake this year To become a police officer, jim found ou t that when lifting you should drastically increase weight in order to see if you have made gains true or false? Can anyone help me with question 10 a.