1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shusha [124]
3 years ago
14

John's class is doing an experiment that involves mice. The mice are kept in a large, clean cage, and John gives them water and

food every day. Many of John's classmates like to tease the mice and tap on the glass, but John likes to let the mice out to run around in a safe environment at least once a day.
Which part of the mice's treatment is unethical?
Chemistry
1 answer:
Sphinxa [80]3 years ago
5 0
The unethical part about the mice's treatment is that John's classmates are taping on the glass and teasing the mice.
You might be interested in
100 POINTS FOR QUESTION
Vinil7 [7]

Answer:

do not know

Explanation:

4 0
3 years ago
Read 2 more answers
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpa
Pavlova-9 [17]

Answer:

2.104 L fuel

Explanation:

Given that:

Volume of water = 35 L = 35 × 10³ mL

initial temperature of water = 25.0 ° C

The amount of heat needed to boil water at this temperature can be calculated by using the formula:

q_{boiling} = mc \Delta T

where

specific heat   of water c= 4.18 J/g° C

q_{boiling} = 35 \times 10^{3} \times \dfrac{1.00 \ g}{1 \ mL} \times 4.18  \ J/g^0 C \times (100 - 25)^0 C

q_{boiling} = 10.9725 \times 10^6 \ J

Also; Assume that the fuel has an average formula of C7 H16 and 15% of the heat generated from combustion goes to heat the water;

thus the heat of combustion can be determined via the expression

q_{combustion} =-  \dfrac{q_{boiling}}{0.15}

q_{combustion} =-  \dfrac{10.9725 \times 10^6 J}{0.15}

q_{combustion} = -7.315 \times 10^{7} \ J

q_{combustion} = -7.315 \times 10^{4} \ kJ

For heptane; the equation for its combustion reaction can be written as:

C_7H_{16} + 11O_{2(g)} -----> 7CO_{2(g)}+ 8H_2O_{(g)}

The standard enthalpies of the  products and the reactants are:

\Delta H _f   \ CO_{2(g)} = -393.5 kJ/mol

\Delta H _f   \ H_2O_{(g)} = -242 kJ/mol

\Delta H _f   \ C_7H_{16 }_{(g)} = -224.4 kJ/mol

\Delta H _f   \ O_{2{(g)}} = 0 kJ/mol

Therefore; the standard enthalpy for this combustion reaction is:

\Delta H ^0= \sum n_p\Delta H^0_{f(products)}- \sum n_r\Delta H^0_{f(reactants)}

\Delta H^0 =( 7  \ mol ( -393.5 \ kJ/mol)  + 8 \ mol (-242 \ kJ/mol) -1 \ mol( -224.4 \ kJ/mol) - 11  \ mol  (0 \ kJ/mol))

\Delta H^0 = (-2754.5 \ \  kJ -  1936 \ \  kJ+224.4 \  \ kJ+0 \ \  kJ)

\Delta H^0 = -4466.1 \ kJ

This simply implies that the amount of heat released from 1 mol of C7H16 = 4466.1 kJ

However the number of moles of fuel required to burn 7.315 \times 10^{4} \ kJ heat released is:

n_{fuel} = \dfrac{q}{\Delta \ H^0}

n_{fuel} = \dfrac{-7.315 \times 10^{4} \ kJ}{-4466.1  \ kJ}

n_{fuel} = 16.38  \ mol \ of \ C_7 H_{16

Since number of moles = mass/molar mass

The  mass of the fuel is:

m_{fuel } = 16.38 mol \times 100.198 \ g/mol}

m_{fuel } = 1.641 \times 10^{3} \ g

Given that the density of the fuel is = 0.78 g/mL

and we know that :

density = mass/volume

therefore making volume the subject of the formula in order to determine the volume of the fuel ; we have

volume of the fuel = mass of the fuel / density of the fuel

volume of the fuel = \dfrac{1.641 \times 10^3 \ g }{0.78  g/mL} \times \dfrac{L}{10^3 \ mL}

volume of the fuel  = 2.104 L fuel

3 0
3 years ago
Which of the following particles is the smallest in radius
Gnesinka [82]

Answer:

Its helium

Explanation: Because teh effective nuclear charge holds the valence ectrons clos to the nuclues. the Atomic radius would decrease as you move from the led=ft and right of the perodic table

7 0
2 years ago
Read 2 more answers
IF 500 mL of air contains 2.50x10^22 particles (atoms and molecules). how much particles do you inhale in one day if you breath
vaieri [72.5K]

Answer:

I think it is 0.00192

Explanation:

28.795705

15000

=0.00192

8 0
3 years ago
Which is mostly likely to cause clouds to form in a previously clear sky?​
xxTIMURxx [149]

Answer:

Curious clouds.... ...

6 0
3 years ago
Read 2 more answers
Other questions:
  • A 4 gram metal object displaces 2 mL of water in a graduated cylinder. What is the density of the metal object?
    13·1 answer
  • At room temp which of the following is the MOST compressible?
    10·2 answers
  • Is burning sugar a chemical or physical change? Please provide explanation
    12·2 answers
  • What type of energy does a rock resting on top of a hill have?
    13·2 answers
  • What is the difference between bulk and particle scale? <br> Someone please help!!
    5·1 answer
  • How can you use the periodic table to find the number of protons in one atom of an element?
    9·1 answer
  • Magnesium ions can be precipitated from seawater by the addition of sodium hydroxide. How much sodium hydroxide in grams must be
    8·1 answer
  • Does an object that feels cold to the touch contain thermal energy? explain your answer.
    13·1 answer
  • 2. The development of microscopes allowed scientists to investigate living things in greater detail. Through many investigations
    5·1 answer
  • How many grams of iron (Fe) would be needed to generate 5.25 g of hydrogen gas (H2)?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!