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zhuklara [117]
3 years ago
6

اَلسَلامُ عَلَيْكُم وَرَحْمَةُ اَللهِ وَبَرَكاتُه

Chemistry
1 answer:
LenaWriter [7]3 years ago
4 0
Its greetings in arabic that muslims commonly use, its says" let peace and blessing of Allah be with you"
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What is the general form for the simplest type of acid-base reaction?
Masteriza [31]

Answer:

Your answer is C

Explanation:

When an acid and base react, the acidic hydrogen ion and the basic hydroxide ion in each acid and base neutralize each other and form water. Meanwhile the conjugate base and conjugate acid (the leftover compounds) react to form an ionic molecule, or a salt. (In chemistry, when an anion and a cation form an ionic bond the new molecule is called a salt). Hope this helps!

7 0
3 years ago
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A weather balloon is released into the sky to take data. At ground level the temperature was 32 degrees celcius and the balloon
rjkz [21]

Answer:I’m not sure

Explanation:free trial. oKay

8 0
3 years ago
If a cell is placed in salt water, water leaves the cell by _____.
stepladder [879]
The correct answer to fill the blank in the sentence is A. If a cell is placed in salt water, water leaves the cell by osmosis. It is the spontaneous movement of solvent molecules in a semi-permeable membrane from a higher concentration to lower concentration to achieve equilibrium.
3 0
3 years ago
A mass spectrometer is being used to monitor air pollutants. It is difficult, however, to separate molecules with nearly equal m
tatyana61 [14]

Answer:

4.2 m

Explanation:

The energy (E) of the selector region of the spectrometer is:

E = v*B (equation 1)

Where v is the velocity, and B the magnetic field.

The force with which particle forms a curved path can be calculated by:

\frac{mv^2}{r} = qB'

Where r is the radius of the particle, m is the mass, and q the electric charge. So:

r = \frac{mv}{qB'}

For equation 1: v = E/B, so:

r = \frac{mE}{qBB'}

The two species will be separated by Δr = 0.42 mm

Δr = Δm*E/(q*B*B')

E/(q*B*B') = r/m

Δr = Δm*r/m

r = m*Δr/Δm

r is the large of curvature, m is the avarege mass = (28.0106 + 28.0134)/2 = 28.012:

r = (28.012*0.42)/(28.0134 - 28.0106)

r = 11.76504/(0.0028)

r = 4201.8 mm

r = 4.2 m

3 0
3 years ago
How many numbers between 1-100 are equal to five times an odd number?​
VashaNatasha [74]

<u>Answer:</u>

<em>There are 10 numbers between 1-100 which are equal to 5 times an odd number.</em>

<u>Explanation:</u>

<em>The odd numbers between 1 and 100 are 1,3,5,7….. </em>

When these when these odd numbers are multiplied by 5 we get the following result.

5 \times 1=5

5 \times 3=15

5 \times 19=95

<em>These products form an AP 5,15,25,…..,95 </em>

common difference d=10

first term a=5  

last term a_n=95  

we have to calculate the number of terms n

The expression for last term a_n of an AP is  

<em>a_n=a+(n-1)d</em>

<em>a_n=a+nd-d</em>

<em>nd=a_n-a+d =95-5+10=100 </em>

<em>n= \frac{100}{d}= \frac{100}{10}=10</em>

4 0
3 years ago
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