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2 years ago

What’s the difference between internal stimuli and external stimuli

Chemistry

1 answer:

oee [108]2 years ago

3 0

Answer:

An external stimuli is a stimulus that comes from outside an organism and causes a reaction.An internal stimuli is a stimulus that comes from inside an organism.

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Consider the reaction of CaC2 and water to produce CaCO3 and NH3 according to the reaction CaCN2 + 3H2O → CaCO3 + 2 NH3 . How mu

xz_007 [3.2K]

Answer:

16.27 g of CaCO3 are produced upon reaction of 45 g CaCN2 and 45 g of H2O.

Explanation:

Ca(CN)2 + 3H2O → CaCO3 + 2 NH3

First of all, let's find out the limiting reactant.

Molar mass Ca(CN)2.

Molar mass H2O: 18 g/m

Moles of Ca(CN)2: mass / molar mass

45 g / 92.08 g/m = 0.488 moles

Moles of H2O: mass / molar mass

45g / 18g/m = 2.50 moles

This is my rule of three

1 mol of Ca(CN)2 needs 3 moles of H2O

2.5 moles of Ca(CN)2 needs (2.5 . 3) / 1 = 7.5 moles

I need 7.5 moles of water, but I only have 0.488. Obviously water is the limiting reactant; now we can work on it.

3 moles of water __ makes __ 1 mol of CaCO3

0.488 moles of water __ makes ___ (0.488 . 1) / 3 = 0.163 moles

Molar mass CaCO3 = 100.08 g/m

Molar mass . moles = mass

100.08 g/m . 0.163 moles = 16.27 g

4 0

3 years ago

How long should the mpi be retained? permanently 25 years 50 years 10 years?

Aleksandr-060686 [28]

Master Patient Index will be kept by the hospital or medical institution permanently. It is also called Enterprise or enterprise-wide master patient index and it is a database that is used to healthcare organization to maintain its consistency, accurate information of the patients and essential medical documents or data of the patients managed within the departments. It is important to have an accurate identification of individuals that are in the Master Patient (person) Index or MPI in an organization. The MPI is also the registry of every patient in a healthcare it is used to identify, match, de-duplicate and cleanses the record of the individual. It is helpful to the healthcare organization to have this because they can find faster the data or information of the patients they searching.

7 0

3 years ago

Read 2 more answers

A gas occupies 210 mL at -73°C to have the same gas occupy 360 mL:

const2013 [10]

Answer:

a. The temperature should be increased.

b. 342.86K

Explanation:

Using Charles law equation as follows:

V1/T1 = V2/T2

Where;

V1 = initial volume (mL)

V2 = final volume (mL)

T1 = initial temperature (K)

T2 = final temperature (K)

According to this question, the following information were given:

V1 = 210mL

V2 = 360mL

T1 = -73°C (-73 + 273 = 200K)

T2 = ?

Using V1/T1 = V2/T2

210/200 = 360/T2

Cross multiply

200 × 360 = 210 × T2

72000 = 210T2

T2 = 72000/210

T2 (new temperature) = 342.86K

8 0

2 years ago

Why would an electrician use parallel circuits to wire the lights in each room of a house instead of using a series circuit?

aivan3 [116]

B.
When electricians get their license, they are only licensed to install parallel circuits. Most electricians aren't certified to install series circuits.

5 0

3 years ago

Why are scientific models important in the study of science

AfilCa [17]

Answer:

Models are important in the study of science because they explain a scientific phenomenon that is not directly experienced.

Explanation:

A Model in science is an idea, a process or a system applied by scientists to test hypothesis of a certain phenomenon in study. A model can be used to predict information using the data obtained. However, it is important to mention that after testing a model , a scientist can<u> improve it using new data</u> obtained in the area of study. Models are therefore <u>a vital part of scientific research and the results </u>communicated when explaining a phenomenon.

6 0

3 years ago