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zysi [14]
3 years ago
12

Read this excerpt from Immigrant Kids. The second doctor watched for contagious and infectious diseases. He looked especially fo

r infections of the scalp and at the eyelids for symptoms of trachoma, a blinding disease. Since trachoma caused more than half of all medical detentions, this doctor was greatly feared. He stood directly in the immigrant's path. With a swift movement, he would grab the immigrant's eyelid, pull it up, and peer beneath it. If all was well, the immigrant was passed on. The purpose of this excerpt is to provide information about eye doctors and to explain how they traveled the immigrant’s path. to provide information about eye disease and to explain its medical treatment. to provide information about scalp infections and to explain how they can be prevented. to provide information about trachoma and to explain how it was diagnosed among immigrants.
Chemistry
2 answers:
Mice21 [21]3 years ago
7 0

up until this is 6AM I 66inches the sending 66

Explanation:

tight ends and I 6AM the sending o the sending the

wariber [46]3 years ago
5 0

Explanation:

the answer is D. I just took the test

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Describe the steps used to create Lewis dot structures to represent covalent bonds.
antiseptic1488 [7]
1)Identify the atoms that are participating in a covalent bond.
2)Draw each atom by using its element symbol. The number of valence electrons is shown by placing up to two dots on each side of the element symbol, with each dot representing a single valence electron.
3)Predict the number of covalent bonds each atom will make using the octet rule.
4)Draw the bonding atoms next to each other, showing a single covalent bond as either a pair of dots or a line representing a shared valence electron pair. If the molecule forms a double or triple bond, use two or three lines to represent the shared electron pairs, respectively.

5 0
3 years ago
Calculate the amount of oxygen gas collected by the displacement of water at 14◦C if the atmospheric pressure is 790 Torr and th
zhannawk [14.2K]

Answer : The amount of oxygen gas collected are, 0.217 mol

Explanation :

Using ideal gas equation :

PV=nRT

where,

P = pressure of gas = (790-12)torr=778torr=1.02atm     (1 atm = 760 torr)

V = volume of gas = 5 L

T = temperature of gas = 14^oC=273+14=287K

n = number of moles of gas = ?

R = gas constant  = 0.0821 L.atm/mol.K

Now put all the given values in the ideal gas equation, we get:

(1.02atm)\times (5L)=n\times (0.0821L.atm/mol.K)\times (287K)

n=0.217mole

Thus, the amount of oxygen gas collected are, 0.217 mol

8 0
3 years ago
Andrew noticed that the plastic in his chair didnt feel as cold as the metal legs. What statement best explains this observation
qaws [65]

Answer:

Explanation:

Hi! :) You didn't post the statements, but the answer should be something about conduction. Hope this helps!

7 0
3 years ago
Determine whether the reaction will be spontaneous at high temperatures only, at low temperatures only, at all temperatures, or
LiRa [457]

Answer:

The rusting of iron is spontaneous at low temperatures.

Explanation:

The given chemical reaction is:

4Fe(s) + 3O2(g) ----> 2Fe2O3(s) [rust]

The rusting of iron is a chemical reaction in which iron reacts with oxygen in presence of moisture and forms iron oxide.

This reaction takes place in a faster rate when there is low temperatures in the atmosphere.

When temperature is low, the moisture in the atmosphere is more and hence, rate of rusting is more.

5 0
2 years ago
One half of the distance between the nuclei of two atoms bonded together by a single bond is known as
vodka [1.7K]
Answer is: <span>an atomic radius.

</span>The atomic radius<span> of a </span>chemical element<span> is a measure of the size of its atom.
</span>The atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.
The atomic radius decreases across the periods because an increasing number of protons, because <span>greater attraction between the protons and electrons.</span>
7 0
3 years ago
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