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3 years ago

7

Classify each reaction as combination, decomposition, single replacement, double replacement, or combustion. c2h4(g) + 3o2(g) →2

co2(g) + 2h2o(g)

1 answer:

soldier1979 [14.2K]3 years ago

5 0

If combined with oxygen. the reaction is usually combustion. in this case, it is the combustion of ethene

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1144 grams of Chromium =<br> number.<br> moles of Chromium, rounded to the nearest whole

likoan [24]

Answer:

22moles

Explanation:

3 0

3 years ago

A student observes the chemical process described by this equation:

choli [55]

Answer:

Both are equal

Explanation:

Mass of starting material i.e Aluminium is $4.480 * 10^{-23}$ grams

The weight of oxygen is $2.65 * 10^{-23}$

There are 4 atoms of aluminium and 3 atoms of oxygen

Thus, the total mass of starting material is

$4 *$ mass of one atom of aluminium $+ 6 *$ mass of one atom of oxygen

$4 * 4.480 * 10^{-23} + 6* 2.65 * 10^{-23}$

$35.1 * 10^{-23}$ grams

Mass of new substance is also equal to

$4 *$ mass of one atom of aluminium $+ 6 *$ mass of one atom of oxygen

$4 * 4.480 * 10^{-23} + 6* 2.65 * 10^{-23}$

$35.1 * 10^{-23}$ grams

5 0

3 years ago

What test was used to identify hydrogen gas? Write a balanced equation to represent the test?

const2013 [10]

Burning splint test
2H2 (g) + O2 (g) -> 2H20 (g) + heat
It’s a combustion reaction

6 0

3 years ago

Somebody please answer

Zepler [3.9K]

Answer:

177 mmHg

Explanation:

Given that:

The sample of a gas is with Pressure (1) $P_1$ = 500 mmHg

The initial temperature $T_1$ = 773 K

The final temperature $T_2$ = 273 K

Using ideal gas equation:

$\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2} \\ \\ \dfrac{500}{773} = \dfrac{P_2}{273} \\ \\ (136500) = 773 \times P_2 \\ \\ P_2 = \dfrac{136500}{773} \\ \\ P_2 = 176.58 \ mmHg \\ \\ \simeq 177 mmHg$

7 0

3 years ago

For the following question, select the correct chemical formula for the elements if they were to bong together.

9966 [12]

Answer:

Ionic

Explanation:

Lithium is an alkali metal and form an ionic bond by donating an electron.

Fluorine is a halogen and forms ionic bonds by accepting an electron.

The electronegativity difference between lithium (0.98) and fluorine (3.98) is 3 Pauling units. Usually, when elements have a difference of 1.7 (or 2.0) Pauling units the bond is classified as ionic.

Hope this helps! If you have any more questions or need more explanation please leave a comment down below and I will reply ASAP. Good luck!

5 0

3 years ago

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