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CaHeK987 [17]
2 years ago
14

Use the periodic table or graphic in lesson. what is the atomic number of carbon?

Chemistry
2 answers:
DochEvi [55]2 years ago
4 0
Carbon's atomic number is 6
Neporo4naja [7]2 years ago
3 0

Answer:

The atomic number of Carbon is 6

Explanation:

Atomic number means the number of protons in the nucleus of an atom. Carbon has 6 protons in the nucleus and therefor its atomic number is 6. In the periodic table the atomic number is usually found on the top right corner of each element. Carbon is also located in the group 14 (also known as group IVA) and in period 2.

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A 0.5 kg ball rolls down a frictionless inclined plane. The height of the inclined plane is 0.5m. What is the kinetic energy of
joja [24]

Answer:

2.45Joules

Explanation:

since kinetic energy is K.E.=1/2mv^{2}

lost in potential energy is gain of kinetic energy

mgh=1/2mv^2

9.8*2*0.5=v^2

v^{2}=9.8

v=\sqrt{9.8} =3.13m/s

now k.e. = 0.5*m*v^{2} =0.5*0.5*9.8 =2.45J

8 0
3 years ago
12. Which gas has the greatest kinetic energy at STP?
balandron [24]

Answer:

d. none of the above (all have the same kinetic energy)

Explanation:

The kinetic theory of gases states that the molecules of an ideal gas experience a constant random motion.

At standard temperature and pressure (STP), the kinetic energy of an ideal gas such as hydrogen, argon, neon, sodium, oxygen, helium, magnesium, beryllium, nitrogen, carbon, fluorine, chlorine etc are all the same.

The standard temperature and pressure (STP) of an ideal gas is 273K and 100 kPa.

Hence, all of the gases have the same kinetic energy at standard temperature and pressure (STP).

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

K.E = \frac{1}{2}MV^{2}

Where, K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

4 0
3 years ago
Hydrogen sulfide is composed of two elements: hydrogen and sulfur. in an experiment, 6.500 g of hydrogen sulfide is fully decomp
LiRa [457]
Hydrogen sulfide = hidrogen + sulfur

       6.500 g                      

a)                             0.384 g   +    x

=> 6.500 = 0.384 + x => x = 6.500 - 0.384 = 6.116 g

Answer: 6.116 g of sulfur must be obtained

b) this experiment demonstrate the conservation of mass.

c) Dalton's atomic model states that the atoms cannot be created, split or be destroyed, and so in a chemical reaction the atoms rearrange but the number of each type of atoms remain constant, so the mass of each type of atoms and the total mass remain constant.
8 0
3 years ago
If acids are compounds that release protons (h+), how is it that sox and nox cause acid rain?
tino4ka555 [31]
The protons come from water. Sulfur oxides dissolve in water to form sulfurous and sulfuric acids, and nitrogen oxides dissolve to form nitrous and nitric acids.
3 0
3 years ago
Please help me i have to get this done now
Marysya12 [62]

Answer:

Calvatia craniiformis is the real answer, according to the biggest European Bilogical lecture

4 0
3 years ago
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