Answer:
Explanation: ques 8
I think so it is a hydrogen atom ,because it is only atom atom that has 1 proton .as the question is to identify the atom with no of proton so it is hydrogen . it has atomic number 1
ques 9
the isotpoe of hydrogen having 2 neutrons is caled tritrium . it has mass number 3
ques no 10
as the protons are present in nucleus and electrons revovle around it so the term is clear . remember atoms do not have defined boundaries .
Answer:
(f - g)(2) = -6
Step-by-step explanation:
(f - g)(2) = (-2x + 8) - 5x, where x=2
= (-2(2) + 8) - 5(2)
= (-4 + 8) - 10
= 4 - 10
= -6
(f - g)(2) = -6
Answer:
The numbers of moles in 20.0g of NaOH:
n= = = (moles)
Mass of methane takne = 1.5g
moles of methane used = masss / molar mass = 1.5 / 16 = 0.094 moles
mass of water = 1000 g
Initial temperature of water = 25 C
final temperature = 37 C
specific heat of water = 4.184 J /g C
1) Heat absorbed by water = q =m• C• ΔT = 1000 X 4.184 x (37-25) = 50208 Joules
2) Heat absorbed by calorimeter = Heat capacity X ΔT = 695 X (37-25) = 8340 J
3) Total heat of combustion = heat absorbed by water + calorimeter = 50208 + 8340 = 58548 Joules
This heat is released by 0.094 moles of methane
So heat released by one mole of methane =
- 622851.06 Joules = 622.85 kJ / mole
4) standard enthalpy of combustion = -882 kJ / mole
Error = (882-622.85) X 100 / 882 = 24.84 %
Answer:
The neck, Tongue, Heart and circulation and Lungs.
Explanation:
The Neck: The total length of the giraffe's neck is 6 feet and carries the muscles of about 550 pounds. But the unique characteristics is that it has same vertebrae as humans have i.e. 7. And to support these heavy muscles at the base of the neck spines are there projecting upwards.
The Tongue: Giraffe has a very avaricious long tongue that helps it to gets different vegetation.
Heart: Surprisingly the heart of the giraffe is small in structure yet powerful. And the blood pressure is quite high, double relatively to human so to pump the blood to its brain along with the long neck.