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Juliette [100K]
3 years ago
12

Hen the space shuttle blasts into orbit, a hot gas forms when hydrogen and oxygen join to make water. this helps the space shutt

le to blast into orbit. the formation of this gas is an example of
Chemistry
1 answer:
sukhopar [10]3 years ago
3 0

Answer: compound

Explanation:

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Briefly describe how a potentiometric pHmeter works. (Hint: Describe how the pH meter measures the amount of H+ or OH- ions in a
KengaRu [80]

Answer:

Indicators show changes in the pH of a solution

Explanation:

A pH meter is an instrument that measures the hydrogen-ion activity in aqueous solutions, indicating the acidity or alkalinity of the solution expressed as pH .The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode, hence the pH meter is sometimes referred to as a potentiometric pH meter. Potentiometric pH meters measure the voltage between two electrodes and display the result converted into the corresponding pH value. The instrument comprises of a simple electronic amplifier and a pair of electrodes, or alternatively a combination electrode, and some form of display calibrated in pH units. It usually has a glass electrode and a reference electrode, or a combination electrode. The electrodes, or probes, are inserted into the solution to be tested.

Organic indicators are chemical species that change their colour in response to changes in the pH of the solution. This implies that the anionic and protonated forms of the indicator possess different colours. Hence the colour changes in acidic, basic and neutral solutions. The images attached indicate the colour changes in phenolphthalein and methyl orange in acidic and basic media accordingly.

4 0
3 years ago
Will a precipitate form from Pb(NO3)2(aq) and HCl(aq)?
Rus_ich [418]
1. Write out the formula Pb(NO3)2 (aq) + 2HCl (aq) ----> PbCl2 + 2HNO3 2. Use solubility guidelines (gotta memorize 'em) for the products to see if a solid forms Nitrates are always soluble so 2HNO3 (aq) Chlorides (Cl) are always soluble except for when you mix them with copper, lead, mercury, or silver. Since you mixed it with lead (Pb) it is solid and forms a precipitate. PbCl2 (s)
5 0
3 years ago
Which process results in a chemical change?
Alla [95]
D) burning magnesium ribbon, as combustion is a chemical reaction so causes chemical change. The other 3 options do not involve reactions so there isn't a chemical change.
5 0
3 years ago
Read 2 more answers
Can we all agree chemistry is hard lol
Dmitry_Shevchenko [17]

Yes, I agree.

Chemistry can be difficult.

5 0
3 years ago
How many moles of KCIO3 are in 5 g of KClO3?
STatiana [176]

Molar mass of KClO3

\\ \tt\hookrightarrow 39+35+3(16)

\\ \tt\hookrightarrow 74+48

\\ \tt\hookrightarrow 122g/mol

Now

\\ \tt\hookrightarrow No\:of\:moles=\dfrac{Given\:mass}{Molar\:mass}

\\ \tt\hookrightarrow No\:of\:moles=\dfrac{5}{122}

\\ \tt\hookrightarrow No\:of\:moles=0.04mol

6 0
2 years ago
Read 2 more answers
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