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KonstantinChe [14]
2 years ago
8

Consider the diagram below

Chemistry
1 answer:
Artyom0805 [142]2 years ago
5 0
Energy of the reactants would be correct
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What would be the mass of 9.03*10^21 molecules of hydrobromic acid
Fynjy0 [20]

Answer:

2.11 g hydrobromic acid (correct to 3SF)

Explanation:

Molecular formula of hydrobromic acid = C2H5BrO2

mass of C2H5BrO2 = 140.96g

Beginning with what we're given, 9.03*10^21 we then make a conversion by using Avegadro's number which is 6.02*10^23 per mole (Oct. 23 at 6:02 am is national mole day :) Then, we need to convert out of moles, 140.96g hydrombromic acid per mole.

It looks like this:

9.03*10^21 molecules • (1 mol C2H5BrO2 / 6.02*10^23 molecules) • (140g C2H5BrO2 / 1 mol) = 2.1144 g C2H5BrO2

3 0
3 years ago
A gecko used its sticky feet to crawl from the bottom of a window to the top of
sp2606 [1]

Answer:

Decreased

Explanation:

You're faster when you go downhill than you are uphill.

8 0
3 years ago
Two Balloons one filled with hydrogen gas and second filled with neon gas. what gas should be used in an experiement to identify
dalvyx [7]

Answer:

Oxygen

Explanation:

If two balloons are filled with hydrogen gas and helium gas respectively, then we want to identify what gas is in each balloon, we have to do so by exposing the both balloons to flame in an oxygen atmosphere.

Hydrogen combines with oxygen in the presence of a flame with quite a loud sound and the flame is sustained but when a flame is brought near helium gas in a balloon, the gas will only make a little sound when exposed to the flame and extinguish the flame.

The reason for the explosion of the gas in the hydrogen balloon is that combustion of hydrogen gas is exothermic. The heating up of surrounding air molecules leads to a sudden explosion.

However, the helium balloon makes a little sound when the balloon is ruptured releasing helium gas which extinguishes the flame.

8 0
3 years ago
True or false?<br><br> Kinetic energy depends only on an object’s speed and velocity.<br><br> Help!
AlekseyPX
False, kinetic energy depends on an objects mass and speed
8 0
3 years ago
Read 2 more answers
What is the symbol for the carbon isotope with seven neutrons?
Tresset [83]
Carbon -13 has 7 neutrons and carbon -12 has six neutrons. Carbon -12 is the most common isotope of Carbon. Carbon -14 is radioactive and vary rare. The symbols for the isotopes of Carbon atoms shown here indicate they each have six protons but mass numbers of 14, 13, and 12. Hope this helps. :)
8 0
3 years ago
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