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aivan3 [116]
3 years ago
5

1. Because its structure is more complex,

Chemistry
1 answer:
Mashutka [201]3 years ago
3 0

Answer:

Organs are more complex units than tissues. An organ is an organization of several different kinds of tissues so arranged that together they can perform a special function. For example, the stomach is an organization of muscle, connective, epithelial, and nervous tissues.

Explanation:

:)

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A sodium atom has 11 protons and 12 neutrons. What is the mass number of this sodium atom?​
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Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.

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Energy from the Sun contributes to these two main factors that create ocean currents: _____ and _____.
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You start out with 800 moles of a radioactive substance. After 24 hours, 100 moles remain. What is the half-life of the substanc
Nookie1986 [14]

The half life of the substance is 8 hours , Option D is the correct answer.

<h3></h3>

What is Half Life ?

Half-life is the time required by an unstable element  to reduce to half of its initial value.

The term is commonly used in nuclear physics.

The formula is

\rm N(t) = \; N_{0} \;(\dfrac{1}{2} )^{\frac{t}{t_{1/2} } }

N(t)     =    quantity of the substance remaining

N ₀      =    initial quantity of the substance

t    =  time elapsed

\rm t_{1/2}    =    half life of the substance

The data given in the question is N ₀ = 800 moles , N(t)= 100 , t= 24 hours

\rm t_{1/2} =\; ?

Substituting values in the equation

\rm 100 = \; 800 \;(\dfrac{1}{2} )^{\frac{24}{t_{1/2} } }

\rm \dfrac{100}{800}  =  \;(\dfrac{1}{2} )^{\frac{24}{t_{1/2} } }\\\\\rm \dfrac{1}{8}  =  \;(\dfrac{1}{2} )^{\frac{24}{t_{1/2} } }\\\\\rm (\dfrac{1}{2})^{3}  =  \;(\dfrac{1}{2} )^{\frac{24}{t_{1/2} } }\\\\\rm 3=\dfrac{24}{t_{1/2} }\\\\t_{1/2}= \dfrac{24}{3}\\\\t_{1/2} = 8 hours

Therefore half life of the substance is 8 hours , Option D is the correct answer.

To know more about Half Life

brainly.com/question/24710827

#SPJ2

3 0
2 years ago
If 550 mL of a 3.50 M KCl solution are set aside and alowed to evaporate unti the
andrezito [222]

1) list givens and convert if necessary

C₁ = 3.50 mol/L

V₁ = 0.550 L

C₂ = ?

V₂ = 0.275 L

2) rearrange formula

C_{1}V_{1}=C_{2}V_{2}\\\\C_{2}=\frac{C_{1}V_{1}}{V_{2}}

3) solve

C_{2}=\frac{(3.50\ mol/L)(0.550\ L)}{(0.275\ L)}

C₂ = 7.00 mol/L

5 0
3 years ago
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