All categories

3 years ago

Summary about helium

1 answer:

6 0

Answer: Helium is an type of air that can be used to inflate balloons, balls, and other things that require air. The carbon dioxide we breath out is similar to this helium.

Hope this helps!

You might be interested in

In a reaction, a + b + c→ d, it is found that the reaction is first order in terms of a and second order in terms of b and half

Vikentia [17]

Rate=[a]*([b]^2)*([c]^(1/2)]
rate=[2a]*([b]^2)*([2c]^(1/2)]= 2*(2^(1/2)[a]*([b]^2)*([c]
it increases times 2*(2^(1/2)=2√2

6 0

3 years ago

BONUS QUESTION - It takes 194 mL of a 0.5 M NaOH solution to neutralize 300

Strike441 [17]

Answer:

1.7 mol/dm3

Explanation:

working out in the image

6 0

2 years ago

Select all that apply.

serious [3.7K]

A beta particle is an electron and it has a -1 charge and zero mass.

Beta decay by emitting an electron is called as β⁻ decay. When this happens, a neutron of the element converts into a proton by emitting an electron. Hence, the mass of daughter nucleus is same as parent atom but atomic number/number of protons is higher by 1 than atomic number of parent atom.

In a β⁻ decay, the symbol is used as ₋₁⁰β or ₋₁⁰e.
-1 is for charge
 0 is for the mass of the particle

4 0

3 years ago

Read 2 more answers

The pK1, pK2, and pKR of the amino acid lysine are 2.2, 9.1, and 10.5, respectively. The pK1, pK2, and pKR of the amino acid arg

almond37 [142]

Answer:

pH 9,8 is likely to work best for this separation

Explanation:

Ion exchange chromatography is a chemical process where molecules are separated by affinity to an ion exchange resin. To separate different aminoacids you must use the isoelectric point (That is the pH where the aminoacid will be in its neutral form).

For lysine, PI is:

$pH = \frac{1}{2} (9,1+10,5) =$ 9,8

For arginine:

$pH = \frac{1}{2} (9,0+12,5) =$ 10,75

At pH = 9,8 lysine will be in its neutral form and will not be retain in the column but arginine will be in +1 charge being retained by the ion exchange resin.

Thus, pH 9,8 is likely to work best for this separation

I hope it helps!

5 0

3 years ago

Formula unit of Magnesium oxide and Calcium bicarbonate and aluminum carbonate plzzzz

Fudgin [204]

Magnesium oxide : MgO

Calcium bicarbonate: Ca(HCO3)2

aluminum carbonate: Al2(CO3)3 or C3Al2O9

5 0

3 years ago