Check the level of motor oil in your engine by ?

A process engineer performed jar tests for a water in order to determine the optimal pH and dose using alum. A test was conducte

IRINA_888 [86]

Answer:

1) 13 mg/liters

2) 72.22 mg/lit

3) The Alkanity in raw water is not sufficient enough and the kinds of chemicals needed to enhance its acidity are

CaO
KOH
Na2CO3
NaOH
CO2
NaHCO3

Explanation:

1) plot of turbidity versus dose and optimal dose of Alum ( mg/L )

Optimal dose of Alum = 13 mg/liters from the graph attached below

2) Theoretical amount of alkalinity consumed at the optimal dose can be calculated as follows

Alkanity is due to $HCO^-_{3}$

given optimal dose of Alum = 13 mg/liters for question 1

I mole of alum = 2 moles of AL(OH)3

666 grams of alum = 2*27 = 54 grams of AL(OH)3

hence 1 mole of $AL^{+3}$ = (13/54 ) mMole / lit

The moles of HCO3 = 6 * $\frac{13}{54}$ because 1 mole of Alum reacts with 6 moles of HC03

[HCO3] as CaCO3 = 6 * (13/54) * 50

= 72.22 mg/lit (theoretical amount of alkalinity consumed)

3) The Alkanity in raw water is not sufficient enough and the kinds of chemicals needed to enhance its acidity are

CaO
KOH
Na2CO3
NaOH
CO2
NaHCO3

3 0

3 years ago

2.31 LAB: Simple statistics Part 1 Given 4 integers, output their product and their average, using integer arithmetic. Ex: If th

Elden [556K]

Answer:

Explanation:

Note: Integer division discards the fraction. Hence the average of 8, 10, 5, 4 is output as 6, not 6.75.

Note: The test cases include four very large input values whose product results in overflow. You do not need to do anything special, but just observe that the output does not represent the correct product (in fact, four positive numbers yield a negative output; wow).

Submit the above for grading. Your program will fail the last test cases (which is expected), until you complete part 2 below.

Part 2: Also output the product and average, using floating-point arithmetic.

Output each floating-point value with three digits after the decimal point, which can be achieved as follows: System.out.printf("%.3f", yourValue);

Ex: If the input is 8, 10, 5, 4, the output is:

import java.util.Scanner;

public class LabProgram {

public static void main(String[] args) {

Scanner scnr = new Scanner(System.in);

int num1;

int num2;

int num3;

int num4;

num1 = scnr.nextInt();

num2 = scnr.nextInt();

num3 = scnr.nextInt();

num4 = scnr.nextInt();

double average_arith = (num1+num2+num3+num4)/4.0;

double product_arith = num1*num2*num3*num4;

int result1 = (int) average_arith;

int result2 = (int) product_arith;

System.out.printf("%d %d\n",result2,result1);

System.out.printf("%.3f %.3f\n",product_arith,average_arith);

}

expected output : 1600.000 6.750

5 0

3 years ago

Read 2 more answers

The condition where all forces acting on an object are balanced is called

uranmaximum [27]

Answer:

C) O Equilibrium

Explanation:

An object will only accelerate if there is a net or unbalanced force acting upon it.

4 0

3 years ago

1. Which of the following is the ideal way to apply pressure onto pedals?

Vikki [24]

I think D. By pressing gradually

8 0

3 years ago

Read 2 more answers

What is required when setting up a smart phone as a WIFI hotspot?

emmainna [20.7K]

How to create a personal hot spot on an iPhone?

Go to Settings | Cellular | Personal Hotspot.

Tap the slider next to Allow Others to Join. ...

Your Wi-Fi Password will be shown right underneath the Allow Others to Join option. ...

Now, on another device, such as a laptop, go to the Wi-Fi section and search for nearby networks.

5 0

3 years ago