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Author Archives: Anonymous

Find the molar mass of ethanol, (NH4)2SO4.

Find the molar mass of ethanol, (NH4)2SO4.

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 Which of the following is NOT a correct name, symbol combin…

 Which of the following is NOT a correct name, symbol combination?

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Consider this reaction: 2Al(s)+3Cl2  (g)→2AlCl3 (s), How man…

Consider this reaction: 2Al(s)+3Cl2  (g)→2AlCl3 (s), How many moles of aluminum is needed to produce 0.887 mol AlCl3?

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Problem Statement — Hospital Appointment System Create a cla…

Problem Statement — Hospital Appointment System Create a class named Doctor that holds the following field: one String object for the doctor’s name. Create a class named Department that contains two Doctor objects. Create a class named Appointment for a hospital system that includes the date of the appointment (a java.time.LocalDate object), the Department assigned for that appointment, and a String for the room number. Provide constructors for each class that accept parameters for each field, and provide get methods for each field. Then, in a class named TestHospital, create two Appointment objects and, in turn, pass each to a method (displayDetails method defined inside TestHospital) that displays all the details: appointment date, room number, and department information including each doctor’s name. Ensure that comments are provided to explain your code, and verify that the program runs and produces the expected output. Write your code for all the classes one after another in the box provided, and strictly follow the instructions.

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Find the output of the following code. public class Test{   …

Find the output of the following code. public class Test{          public static void main(String []args){          int a = 100;         ++a;        System.out.println(++a);    }  }    

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How many moles are contained in a 2.44 g sample of gold? Mol…

How many moles are contained in a 2.44 g sample of gold? Molar mass of Au = 197.0 g/mol.

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public class Complicated {       private int x = 1;    priva…

public class Complicated {       private int x = 1;    private int y = 1;       public Complicated(int a, int b) {        int x = a + b;         int y = b – a;          int z = y + 100;           this.y = x + 100;          this.x = z;    }     public int getX() { return x; }     public int getY() { return y; }       } Given this definition, what is the output of the following program?   Complicated c = new Complicated(2, 4); System.out.println(c.getX() + “, ” + c.getY());

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 All of the following compounds are soluble in water EXCEPT?

 All of the following compounds are soluble in water EXCEPT?

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 Identify the double displacement reactions among the follow…

 Identify the double displacement reactions among the following:1.    KCl(aq) + AgNO3(aq) → AgCl(s) + KNO3(aq) 2.    Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq) 3.    H2SO4(aq) + 2NaOH(aq) →Na2SO4(aq) + 2H2O(l)

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 An unknown compound contains carbon, hydrogen, and oxygen….

 An unknown compound contains carbon, hydrogen, and oxygen. Calculate the empirical formula given that the following quantities were present: 74.03 g C, 8.70 g H and 17.27 g N.

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