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vladimir1956 [14]
3 years ago
5

What type of extinguisher will extinguish a class a, b or c fire?

Chemistry
1 answer:
RUDIKE [14]3 years ago
7 0
Any fire extinguisher should put out a fire, that is unless the extinguisher is old and faulty.
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If the radius of copper is 0.128 nm, what is the pd of the (100) plane for copper in m-2?
kolbaska11 [484]

Copper has a FCC i.e. face centered cubic crystal structure. The 100 plane is essentially a planar section of the cubic cell where 4 Cu atoms occupy the 4 corners of the plane along with 1 Cu atom at the center of that plane. Each of the Cu atoms in the corners is shared by 4 adjacent unit cells. Thus, there are 2 Cu atoms present in the 100 plane (4*1/4 + 1 = 2).

Now, the planar density PD along the 100 plane is given as:

PD(100) = # atoms in the 100 plane/Area of 100 plane

            = \frac{2}{8R^{2} }

Here R = radius = 0.128 nm = 0.128*10^{-9} m

PD = \frac{2}{8*(0.128*10^{-9}) ^{2} } = 1.526*10^{19} m^{-2}

6 0
3 years ago
When 1.82 mole of HCL reacts with excess MnO2, how many moles of Cl2 form?
liubo4ka [24]
The balanced reaction is:

MnO2<span>(s) + 4HCl(aq) → Cl2(g) + MnCl2(aq) + 2H2O(l)
</span>
We are given the amount of hydrochloric acid to be used for the reaction. This will be the starting point for the calculations.

1.82 mol HCl ( 1 mol Cl2 / 4 mol HCl) = 0.46 mol Cl2

Therefore, 0.46 mol of chlorine gas is produced for the reaction of hydrochloric acid and manganese oxide.
6 0
3 years ago
Please select the word from the list that best fits the definition
leonid [27]

Answer:

Systemic Circulation

Explanation:

7 0
2 years ago
Read 2 more answers
Put the following names in the correct alphabetic indexing order:(1) Topper &amp; Casey Plumbing(2) KST Enterprises(3) Leland an
dangina [55]

Answer: the correct option is 2, 3, 4, 1.

Explanation:alphabetic indexing order is the order in which files or names are being arranged according to the alphabet. In the following names:

2) KST Enterprises

3)Leland and Son Graphics

4)Lucinda Topper

1) Topper & Casey Plumbing.

While arranging alphabetically, the first letters are usually considered but in a scenario where alphabet occurs twice( 3 And 4) the second letter is considered. I hope this helps, thanks

5 0
3 years ago
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Josie observed that when water is boiled in an open beaker it completely disappears, leaving the beaker dry. What can Josie conc
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That when water is boiled in a open beaker and it disappears that it evaporates into the air
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3 years ago
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