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3 years ago

What does the formula H2O mean

Chemistry

2 answers:

andreyandreev [35.5K]3 years ago

6 0

Water

Is the formula of H20

It is the combination of two other substaces that are basic

You can find it on a periodic table

forsale [732]3 years ago

3 0

2 hydrogen and 1 oxygen makes water

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How many moles of carbon dioxide are produced from 8.73 moles of tristearin?

matrenka [14]

Answer:

Explanation:

8.73 mol x mol

2 C57H110O6(S) + 163 O2(g) ---> 114 CO2(g) + 110 H2O(I)

2 mol 114 mol

8.78 mol (114mol/2 mol) =500.46 mol

8 0

3 years ago

What is the atomic number for an element whose mass number is 78,

Ann [662]

Answer:

protons = atomic numbermass number = protons + neutronsatomic number = mass number - neutrons = 78-38 = 40

Explanation:

5 0

2 years ago

Read 2 more answers

Which two elements make up the greatest percentages by mass in Earth’s crust?

yuradex [85]

<h2><u>Answer</u> :</h2>

The most appropriate option is :

$\hookrightarrow \bf2. \: \mathrm{ \underline{oxygen \: \: and \: \: silicon}}$

Since, they are the most abundant elements found in Earth's Crust.

Oxygen (46%)

Silicon (28%)

$\circ { \underline{ \boxed{ \sf{ \color{green}{ \mathrm{hope \: \: it \: \: helps \: \: you .....}}}}}}∘$

4 0

3 years ago

Which of the following accurately describes semiconductor diodes? A. Unlike junction diodes, point-contact diodes are enclosed i

Anna007 [38]

The correct answer is letter A: <span>Unlike junction diodes, point-contact diodes are enclosed in a suitable casing and have terminals for connecting them to a circuit.</span>

5 0

4 years ago

Read 2 more answers

How much mass defect is required to release 5.5 x 1020 J of energy?

Montano1993 [528]

Answer : The mass defect required to release energy is 6111.111 kg

Explanation :

To calculate the mass defect for given energy released, we use Einstein's equation:

$E=\Delta mc^2$

E = Energy released = $5.5\times 10^{20}J$

$\Delta m$ = mass change = ?

c = speed of light = $3\times 10^8m/s$

Now put all the given values in above equation, we get:

$5.5\times 10^{20}Kgm^2/s^2=\Delta m\times (3\times 10^8m/s)^2$

$\Delta m=6111.111kg$

Therefore, the mass defect required to release energy is 6111.111 kg

5 0

3 years ago