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Sophie [7]
3 years ago
9

What's Hexane density in g/cm^3 not g/mL

Chemistry
1 answer:
horrorfan [7]3 years ago
7 0
1 cm^3 and 1 mL are equivalent... so g/cm^3 is the same as g/mL
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What are the similarities between a chemical change and a physical change?
Reil [10]

Answer:

Physical and chemical changes are similar because they are both caused by the interaction of two or more particles.

Explanation:

Physical and chemical changes are similar because they are both caused by the interaction of two or more particles. Physical changes occur through vibrations, impacts, and other forms of movement. Chemical changes are caused by the interaction of two or more atoms or molecules.

7 0
3 years ago
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When a substance changes from one phase to another, which of the following occurs?
Shkiper50 [21]

Answer:

B

Explanation:

The average kinetic energy of the Substance changes.

8 0
3 years ago
What does the plasma membrane do? A. makes food for the cell B. reproduces cells C. keeps the cell small D. encloses specific st
Mila [183]
<span>D. encloses specific structures</span>
3 0
4 years ago
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What is the half-life of a pharmaceutical if the initial dose is 500 mg and only 31 mg remains after 6 hours?
Sergeu [11.5K]

Answer:

\large \boxed{\text{b. 1.5 h}}

Explanation:

1. Calculate the rate constant

The integrated rate law for first order decay is

\ln \left (\dfrac{A_{0}}{A_{t}}\right ) = kt

where

A₀ and A_t are the amounts at t = 0 and t

k is the rate constant

\begin{array}{rcl}\ln \left (\dfrac{500}{31}\right) & = & k \times 6\\\\\ln 16.1 & = & 6k\\2.78& =& 6k\\k & = & \dfrac{2.78}{6}\\\\& = & 0.463 \text{ h}^{-1}\\\end{array}

2. Calculate the half-life

t_{\frac{1}{2}} = \dfrac{\ln2}{k} = \dfrac{\ln2}{\text{0.463  h}^{-1}} = \textbf{1.5 h}\\\\ \text{The half-life is $\large \boxed{\textbf{1.5 h}}$}

4 0
3 years ago
What is the voltage in a circuit is the current is 3 amps and the resistance is 3 ohms
ozzi

Answer:

9

Explanation:

V=I*R

3*3

Thats the answer

7 0
3 years ago
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