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iogann1982 [59]
3 years ago
9

Which statement defines calorimetry

Chemistry
2 answers:
m_a_m_a [10]3 years ago
7 0

I can't answer the question without the statements but I can tell you Calorimetry means measuring amounts of heat released or received during a chemical reaction.

Leni [432]3 years ago
6 0

Answer:

D

Explanation:

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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
Which of these following is true about the mass of the reactants in a chemical reaction?
yuradex [85]
They will be stay the same all the way through. your product must be the same mass
7 0
3 years ago
What kind of intermolecular forces between an ammonia molecule and a water molecule? Note: there is more than one type of interm
dimaraw [331]

Answer:

hydrogen bonding

Explanation:

Dipole-Dipole, Dispersion, hydrogen bonding and ion bond

5 0
3 years ago
Which is a chemical property of soda ash?
Ede4ka [16]
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3 0
3 years ago
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What is a component of John Dalton's atomic theory
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</span>
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3 years ago
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