Metamorphic rocks were once sedimentary, igneous or even other metamorphic rocks that have been changed by heat and pressure. so i think this will help you.
Answer:
the second one
Explanation:
heterogeneous is the mixture that we can see the difference between it's components crearly by eye do it will be the water and pool
3 Particles
Inside the Nucleus:
Protons = +1 relative charge, relative mass of 1.
Neutrons = 0 relative charge, relative mass of 1.
Outside of Nucleus (On on shells):
Electrons = -1 relative charge, relative mass of 0.0005.
Atoms are neutral since there is always the same number of protons as electrons, so the charges cancel each other out.
Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.
Absolute zero is the point at which the fundamental particles of nature have minimal vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion.
By international agreement, absolute zero is defined as precisely; 0 K on the Kelvin scale, which is a thermodynamic (absolute) temperature scale; and –273.15 degrees Celsius on the Celsius scale.
Absolute zero is also precisely equivalent to; 0 degrees R on the Rankine scale (also a thermodynamic temperature scale); and –459.67 degrees F on the Fahrenheit scale.
While scientists can not fully achieve a state of “zero” heat energy in a substance, they have made great advancements in achieving temperatures ever closer to absolute zero (where matter exhibits odd quantum effects).
In 1994, the NIST achieved a record cold temperature of 700 nK (billionths of a kelvin).
In 2003, researchers at MIT eclipsed this with a new record of 450 pK (0.45 nK).
Answer:
31.9178 °C is the final temperature of the water
Explanation:
![2C_6H_6(l)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(l)+6542 kJ](https://tex.z-dn.net/?f=2C_6H_6%28l%29%2B15O_2%28g%29%5Crightarrow%2012CO_2%28g%29%2B6H_2O%28l%29%2B6542%20kJ)
Mass of benzene burned = 6.200 g
Moles of benzene burned = ![\frac{6.200 g}{78 g/mol}=0.0794 mol](https://tex.z-dn.net/?f=%5Cfrac%7B6.200%20g%7D%7B78%20g%2Fmol%7D%3D0.0794%20mol)
According to reaction , 2 moles of benzene gives 6542 kJ of energy on combustion.
Then 0.0794 mol of benzene on combustion will give:
![\frac{6542 kJ}{2}\times 0.0794 kJ=259.7174 kJ=Q](https://tex.z-dn.net/?f=%5Cfrac%7B6542%20kJ%7D%7B2%7D%5Ctimes%200.0794%20kJ%3D259.7174%20kJ%3DQ)
Mass of water in which Q heat is added = m = 5691 g
Initial temperature = ![T_i=21^oC](https://tex.z-dn.net/?f=T_i%3D21%5EoC)
Final temperature = ![T_f](https://tex.z-dn.net/?f=T_f)
Specific heat of water = c = 4.18 J/g°C
Change in temperature of water = ![T_f-T_i](https://tex.z-dn.net/?f=T_f-T_i)
![Q=mc\Delta t=mc(T_f-T_i)](https://tex.z-dn.net/?f=Q%3Dmc%5CDelta%20t%3Dmc%28T_f-T_i%29)
![259,717.4 J=5691 g\times 4.18 J/g^oC\times (T_f-21^oC)](https://tex.z-dn.net/?f=259%2C717.4%20J%3D5691%20g%5Ctimes%204.18%20J%2Fg%5EoC%5Ctimes%20%28T_f-21%5EoC%29)
![T_f=31.91 ^oC](https://tex.z-dn.net/?f=T_f%3D31.91%20%5EoC)
31.9178 °C is the final temperature of the water