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3 years ago

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1. A doctor has ordered 1.5 liters of normal saline for a patient. If it has to be given over 10 hours, how many liters per hour

will drip into the patient’s IV?

1 answer:

max2010maxim [7]3 years ago

7 0

.15 liters of normal saline will drip into the patient's IV per hour.

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Calculate Δ H o for the reaction. CH3OH + HCl → CH3Cl + H2O answer is in kJ/mol .

Nimfa-mama [501]

Answer:

$\Delta H=-28.08 \frac{kJ}{mol}$

Explanation:

Hello,

This types of reactions are likely to be carried out in gaseous phase as it is easier to induce reactions, therefore, for us to compute the change in the enthalpy of this reaction we should write the formation enthalpy of gaseous methanol, hydrogen chloride, methyl chloride and water as -205.1, -92.3, -83.68 and -241.8 kJ/mol respectively. Then, the reaction enthalpy for this reaction is:

$\Delta H=\Delta _fH_{CH_3Cl}+\Delta _fH_{H_2O}-\Delta _fH_{CH_3OH}-\Delta _fH_{HCl}\\\\\Delta H=-83.68\frac{kJ}{mol}-241.8\frac{kJ}{mol}-(-205.1\frac{kJ}{mol})-(-92.3\frac{kJ}{mol} )\\\\\Delta H=-28.08 \frac{kJ}{mol}$

Which accounts for an exothermic chemical reaction.

Regards.

7 0

4 years ago

The specific heat of beryllium is 1.82 J/g*K, and tou have a mass of 15.0 g. When the beryllium is heated it is added to a calor

VMariaS [17]

Answer:

307.87°C

Explanation:

3 0

3 years ago

Calculate the pressure exerted by an book of mass 20kg occupying an area of 2 m square.

kotykmax [81]

The answer is 100 Pa.

The formula for calculating pressure is :

<u>Pressure = Force ÷ Area</u>

<u />

We are given that :

mass = 20 kg
area = 2 m²

We also know that :

<u>Force = mass ×g</u>

<u />

So, force will be :

F = 20 × 10
F = 200 N

Now, we can finally calculate pressure :

P = 200 ÷ 2
P = 100 Pa

8 0

2 years ago

Fe(s) + S(s) → FeS(s)

insens350 [35]

The mass of FeS formed : 11.97 g

<h3>Further explanation</h3>

Reaction

Fe(s) + S(s) → FeS(s)

mass Fe=7.62 g

mol Fe(MW=56 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{7.62}{56}\\\\mol=0.136$

mass S=8.67 g

mol S(MW=32 g/mol) :

$\tt mol=\dfrac{8.67}{32}=0.271$

Limiting reactant : smaller ratio(mol:coefficient) ⇒coefficient=1

Fe : S =0.136 : 0.271⇒Fe limiting(smaller), S excess

Mol FeS based on Fe , so mol FeS=0.136

Mass FeS(MW=88 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.136\times 88=11.97~g$

5 0

3 years ago

The mass of the sedimentary rock is equal to the mass of what

Finger [1]

It would have 018 mass balance calculation and the total of the sedimentary rock mass would like 0.76

8 0

3 years ago