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Anna71 [15]
3 years ago
12

1. How many moles of HCl are in 7.80 X 1022 molecules? Answer:___0.13 moles of HCI​

Chemistry
1 answer:
Nuetrik [128]3 years ago
8 0

Answer: 7.80×10^{22}\frac{1}{6.02*10^{23} } =.13

Explanation:

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Consider each possible structure of carbon dioxide, c o 2. Determine whether the structure is correct and justify your decision.
Mrrafil [7]

This structure is correct due to the total number of bonds and electrons

We employ the octet rule, which states that all atoms in a compound are expected to follow, to check the accuracy of any chemical structure. The octet rule is precisely satisfied for each atom in the depicted structure of carbon IV oxide. The valence shell of each atom in the molecule is surrounded by eight electrons. We may thus infer that this structure is accurate given the total number of bonds and electrons since CO2 has sixteen valence electrons.

It possesses a negative charge of 1.602176634 coulombs, the basic unit of electric charge, which is comparable to its negative charge. The rest mass of an electron is 9.1093837015 10^-31 kg, or just 1/1,836 the mass of a proton. An electron is therefore considered to have practically negligible mass in comparison to a proton or neutron, and its matter is not taken into consideration when calculating an atom's mass number.

The question is incomplete, the complete question is found in the image attached to this answer

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6 0
1 year ago
Select the correct equalities for the units shown.
elena-14-01-66 [18.8K]

Answer

1. 1cm=10mm, 1kg=1000g and 12in=1 ft

2. 50mm=5cm

    48 in =4ft

     36ft=12 yd

     2.5m=250cm

     1000mL= 1 L

Explanation

if 1cm=10mm then 5cm=?

5×10=50mm

if 12 in =1ft then 48in=?

48/12 =4 ft

if 1m=100cm, then 2.5m=?

2.5×100= 250cm

and when know from capacity that 1000mL is equivalent to 1 liter.

7 0
3 years ago
Read 2 more answers
It is obvious that the large stalactites in an underground cavern must have required long ages to form. True False
aivan3 [116]
True, it is formed from immense weathering over time. Hope it helped!
6 0
3 years ago
Which of these outcomes is conclusive evidence that mixing sugar in water is a physical change? There is no change in color. The
Gelneren [198K]
Well, the sugar is dissolving in the water as you mix it which is a physical change.
8 0
3 years ago
Human impact on one system leads to changes in more of Earth's systems.
umka2103 [35]

It is true that human impact on one system leads to changes in more of Earth’s systems.

Answer: Option A

<u>Explanation:</u>

Human impact had created large impacts on Earth’s systems. The pollution in air, deforestation, dumping of lakes lead to several changes in environment. Also emission of carbon, methane and other hazardous gases from several manufacturing unit effect the environment.

Along with this, increase in usage of non-renewable fuels and release of CFC's emitted from AC’s, fridge lead to elimination of ozone layer making the environment open to direct UV radiation. So yes, it is true that human impact on one system leads to changes in more of Earth’s systems.

7 0
3 years ago
Read 2 more answers
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