Can someone help me with this?? I don't understand at all its about acids and bases

Chemistry

2 answers:

podryga [215]3 years ago

8 0

I think Bleach formula is NaClO

mina [271]3 years ago

4 0

Characteristic that indicate if a base or an acid would be that acids have sour taste, the smell makes your nose burn, usually a sticky texture and reacts with h^2. Bases are bitter usually no smell and are slippery.

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S 2 How many protons

serg [7]

16 protons
Explanation: S2-: proton number 16; nucleon number 32
There are 16 protons (from the proton number). If it was a neutral atom, there would be 16 electrons.

6 0

3 years ago

What is the mass of 0.60 moles of Al?

nikitadnepr [17]

It helps to map out how you will navigate through your unit analysis problem before setting it up.

You are given moles and need grams. What can be used as a conversion factor from moles to grams? Molar mass. We are working with aluminum, so we will need the molar mass of aluminum. My Periodic Table tells me the molar mass of aluminum is approximately 27 g/mol. Now we are ready to set up the unit analysis.

$0.60molAl(\frac{27gAl}{1molAl} )=16.2 gAl$

Moles must go on the bottom so that they cancel. Notice how our number of significant figures is 2, so the answer must round to 16 g Al.

<h3>Answer:</h3>

16 grams

5 0

3 years ago

If hydrogen were used as a fuel, it could be burned according to the following reaction: H2(g)+1/2O2(g)→H2O(g). Use average bond

serious [3.7K]

The deltaHrxn = -243 kJ/mol the deltaHrxn of CH4(methane) = -802 kJ/mol

The fuel that yields more energy per mole is METHANE. The negative sign merely signifies the release of energy. Thus, 802 kJ/mol is greater than 243 kJ/mol.

The fuel that yields more energy per gram is HYDROGEN. Here is the computation:
deltaHrxn = (-243 kJ/mol)(1 mol/2.016 g H2) = -120.535714286 kJ/g or -121 kJ/g

deltaHrxn of CH4(methane) = (-802 kJ/mol)(1 mol/16.04 g)
= -50 kJ/g

As discussed the negative sign serves as the symbol of released energy. Thus, 121 is greater than 50.

7 0

3 years ago

Wastewater from a cement factory contains 0.280 g of Ca2+ ion and 0.0220 g of Mg2+ ion per 100.0 L of solution. The solution den

faltersainse [42]

Answer: The concentration of $Ca^{2+}\text{ and }Mg^{2+}$ ions are 2.797 ppm and 0.212 ppm respectively.