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olya-2409 [2.1K]
3 years ago
12

Please help it’s due asap I WILL GIVE BRAINLIEST

Chemistry
1 answer:
inna [77]3 years ago
4 0
I think it’s number 5 and number 9 hopes this helps.
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What is the chemical behaviour of NaCl​
Afina-wow [57]

Answer:

Sodium chloride, a white crystalline solid, contains a density of 2.165 g/mL, the melting point of 801 °C, and the boiling point is about 1,413 °C. It is also available as aqueous solutions with different concentrations, which are known as saline solutions.

5 0
2 years ago
determine the concentration of 35.0mL of an acid solution that requires 25.1mL of a 0.50M NaOH to neutralize it
Degger [83]
Hello!

The general chemical equation for the neutralization of an acid HA with NaOH is the following:

HA(aq) + NaOH(aq) → NaA(aq) + H₂O(l)

For determining the concentration of the acid solution, we can use the equation shown below:

moles HA=moles NaOH \\  \\ cHA*VHA=cNaOH*VNaOH \\  \\ cHA= \frac{cNaOH*vNaOH}{VHA}= \frac{0,5M*25,1 mL}{35 mL}=0,36 M

So, the concentration of the Acid is 0,36 M

Have a nice day!
7 0
4 years ago
It is important to know the difference between atoms, ions, and isotopes. Choose all of the correct answers. An atom of oxygen a
bija089 [108]

The following are true:-

An atom of oxygen and the ion of oxygen both have 8 protons.

As you add or remove neutrons from the nucleus, isotopes are formed.

4 0
4 years ago
Read 2 more answers
Evaluate what advantage might asexual reproduction by fission have compared to sexual reproduction
Pani-rosa [81]
In the absence of a female or male an organism can still replicate giving it an evolutionary advantage which prevents it from becoming extinct. sexual reproduction requires an egg and sperm to fertilise it where as asexual reproduction is just simply the organism dividing into 2 identical usually organisms

hope that helps
7 0
4 years ago
A 0.239 gram sample of a gas in a 100-ml flask exerts a pressure of 603 mm Hg at 14 Celsius. What is the gas? (Hint: don’t forge
AlekseyPX

Answer:

A) chlorine

Explanation:

To solve this question we can use:

PV = nRT

In order to solve the moles of the gas. With the moles and the mass we can find the molar mass of the gas to have an idea of its identy:

PV = nRT

PV / RT = n

<em>Where P is pressure: 603mmHg * (1atm / 760mmHg) = 0.7934atm</em>

<em>V = 100mL = 0.100L</em>

<em>R is gas constant = 0.082atmL/molK</em>

<em>T is absolute temperature = 14°C + 273.15 = 287.15K</em>

0.7934atm*0.100L / 0.082atmL/molK*287.15K = n

3.37x10⁻³ moles of the gas

In 0.239g. The molar mass is:

0.239g / 3.37x10⁻³ moles = 70.9g/mol

The gas with this molar mass is Chlorine, Cl₂:

<h3>A) chlorine </h3><h3 />

6 0
3 years ago
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