3 years ago

Why would you rather have hot cocoa than lemonade on a cold day? (The lesson is called heat transfer)

Chemistry

1 answer:

storchak [24]3 years ago

6 0

Answer:

you would more than likely have hot coca.

Explanation:

Because when its cold out you don't want something cold, its common sense lol.

You might be interested in

Goggle meet - brx - tvyn - oge

svp [43]

Answer: um ok...

Explanation: are u saying to join??

5 0

3 years ago

Protons are located

Lyrx [107]

<span>(C) in the nucleus with neutrons
</span>

7 0

3 years ago

What describes chemical reactions that take place at different rates

PSYCHO15rus [73]

<span>One reaction takes place in less time than the other.</span>

5 0

3 years ago

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

4 years ago

Fecl3 reacts with only one of the two compounds aspirin and salicylic acid with which part of a molecule does fecl3 react

lara [203]

FeCl3 very commonly reacts with phenol groups.

hope this helps!!

8 0

3 years ago

Read 2 more answers