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3 years ago

How do u get a girl to like u

Chemistry

2 answers:

garri49 [273]3 years ago

7 0

You have to be romantic with her and give her presents and always say that she is right.

pentagon [3]3 years ago

7 0

It depends do u like the girl or not...
_________________

If u do than be romantic to her, give her flowers , and ask her dose she like u but don't go ahead of ur self
The most important thing is to be ur self

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Which of these waves requires a medium to travel through?

77julia77 [94]

The answer is B that is sound wave. Sound wave required a medium to travel.

Mechanical wave is not capable of transfer its energy through vacuum . It required a medium to travel and sound wave is an example of mechanical wave that required a medium to travel.

So, All other wave that are listed here doesn't required a medium to travel, among all only sound wave requires a medium to travel.

6 0

3 years ago

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An example of a covalently bonded molecular formula for a diatomic molecule is

Westkost [7]

Answer:

b. I2

Explanation:

I-I is covalently bonded and also diatomic , that's y!

✌️:)

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3 years ago

Which of the following is the abbreviation for an SI unit of mass? A. kg B. m C. s D. °C

DIA [1.3K]

Kg is the abbreviation for an SI unit of mass, which is kilogram

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3 years ago

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7. How many moles are there in 4.6 gms of Sodium(Na)?

Marizza181 [45]

Answer:

0.2mol

Explanation:

mol = mass/mr

mass = 4.6g

mr = 23

mol = 4.6/23

= 0.2mol

7 0

3 years ago

In a titration of nitrous acid with NaOH, the pH of the solution is 3.14 when the moles of HNO2 and the moles of NO2-- are equal

jonny [76]

Answer:

$Ka=3.98x10^{-4}$

Explanation:

Hello there!

In this case, since the modelling of titration problems can be approached via the Henderson-Hasselbach equation to set up a relationship between pH, pKa and the concentration of the acid and its conjugate base, we can write:

$pH=pKa+log(\frac{[NO_2^-]}{[HNO_2]} )$

Whereas the pH is given as 3.14 and the concentrations are the same, that is why the pH would be equal to the pKa as the logarithm gets 0 (log(1)=0); thus, we can calculate the Ka via:

$Ka=10^{-pKa}=10^{-3.14}\\\\Ka=3.98x10^{-4}$

Best regards!

4 0

3 years ago