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jekas [21]
3 years ago
13

The Human Excretory System

Chemistry
2 answers:
zubka84 [21]3 years ago
8 0
1.) The skin excretes salts from it's surface. I don't believe that the liver does.

2.)A) liver

3.)A) liver

4.)D) kidney

5.) I think D









jonny [76]3 years ago
5 0
<span>1) Excretes salts from its surface.
C) Skin


2) Responsible for excreting carbon dioxide.
B) lungs


3) Has functional units called nephrons.
D) kidneys



4) Produces both urea & bile.
A) liver


5) Organ in which blood loses urea & reabsorbs glucose and amino acids.
A) liver
B) lungs
C) skin
D) kidneys


6) Removes old red blood cells from the circulatory system.
A) liver


7) Maintains homeostasis by removing body heat, water, & other wastes.
C) skin



8) Adds or removes glucose from the blood as necessary.
D) kidneys


Which is the correct pathway for the elimination of urine?
A) urethra, ureter, bladder, kidney


In humans, for carbon dioxide to be excreted, it must pass from the blood into:
C) sweat glands


A blockage in a ureter would interfere with:
B) urine entering the bladder



12) Which is NOT a metabolic waste in humans?
A) carbon dioxide
C) salt
D) urea
E) water</span>
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A 135 g sample of H20 at 85°C is cooled. The water loses a total of 15 kJ of energy in the cooling
Andre45 [30]

Answer:

B. 58°C

Explanation:

Hello,

In this case, the relationship among heat, mass, specific heat and temperature for water is mathematically by:

Q=mCp\Delta T=mCp(T_2-T_1)

In such a way, solving for the final temperature T_2 we obtain:

T_2=T_1+\frac{Q}{mCp}

Therefore, we final temperature is computed as follows, considering that the involved heat is negative as it is lost for water:

T_2=85\°C+\frac{-15kJ*\frac{1000J}{1kJ} }{135g*4.184\frac{J}{g\°C} }\\\\T_2=58\°C

Thereby, answer is B. 58°C .

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3 years ago
Write the following numbers in standard notation. Use a terminal decimal point when needed.
ololo11 [35]

The standard notation of 1.0070x10⁴ is 10070

To express enormous figures which are in standard notation like 1,300,000 or exceedingly minuscule quantities like 0.0000000000045, scientists use scientific notation. Scientific notation, also referred to as exponential form, is one of the earliest mathematical techniques. It is well regarded by practitioners. People use scientific notation to handle situations where numbers are too large or too small to be calculated easily. Scientists, engineers, and mathematicians all use this technique. where as standard notation is way writing numbers in normal decimal form. The scientific method id most convenient denoting numbers as the numbers will be either too big or too small.

To learn more about standard notation:

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5 0
1 year ago
What is Keq for the reaction N2 + 3H2 2NH3 if the equilibrium concentrations are [NH3] = 3 M, [N2] = 1 M, and [H2] = 2 M?
Licemer1 [7]

Answer : The correct option is, (D) k_{eq}=1.125

Explanation : Given,

Concentration of NH_3 = 3 M

Concentration of N_2 = 1 M

Concentration of H_2 = 2 M

The given balanced equilibrium reaction is,

N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g)

The expression for equilibrium constant for this reaction will be,

K_{eq}=\frac{[NH_3]^2}{[N_2][H_2]^3}

Now put all the given values in this expression, we get the value of K_{eq}

K_{eq}=\frac{(3)^2}{(1)\times (2)^3}

K_{eq}=1.125

Therefore, the value of K_{eq} for the given reaction is, 1.125

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