The choices for this problem are bismuth, Bi; platinum, Pt; selenium, Se; calcium, Ca and copper, Cu. I think the correct answer would be selenium. The melting point of bismuth is at a temperature of 544.4 Kelvin. At a temperature of 525 K, it would exist as solid. Platinum melts at 2041.1 K. At 525 K, platinum would be in solid form. Selenium has a melting point at 494 K so that at a temperature of 525 K, it would exist in its liquid state. Calcium has a melting point of 1112 K so it would exist as solid at 525 K. Copper has a melting point at 1358 K, so it would still exist as solid at a temperature of 525 K. Therefore, the answer would only be selenium.
Answer:
2 g/mL
Explanation:
The following data were obtained from the question:
Mass (m) = 5 g
Volume (V) = 2.5 mL
Density (D) =.?
Density is simply defined as the mass of substance per unit volume of the substance. Mathematically, it is expressed as:
Density (D) = mass (m) /volume (V)
D = m/V
With the above formula, we can obtain the density of the ball as follow:
Mass (m) = 5 g
Volume (V) = 2.5 mL
Density (D) =.?
D = m/V
D = 5/2.5
D = 2 g/mL
Therefore, the density of the ball is 2 g/mL.
Answer:
HEIGHT IS 6cm and the base is 10 cm
Explanation:
Answer: 26.54 grams
Explanation:
To calculate the moles :
![\text{Moles of lithium nitride}=\frac{12.87g}{34.83g/mol}=0.369moles](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%20lithium%20nitride%7D%3D%5Cfrac%7B12.87g%7D%7B34.83g%2Fmol%7D%3D0.369moles)
is the limiting reagent as it limits the formation of product and
is the excess reagent
According to stoichiometry :
As 1 moles of
give = 3 moles of ![LiOH](https://tex.z-dn.net/?f=LiOH)
Thus 0.369 moles of
give =
of ![LiOH](https://tex.z-dn.net/?f=LiOH)
Mass of ![LiOH=moles\times {\text {Molar mass}}=1.108moles\times 23.95g/mol=26.54g](https://tex.z-dn.net/?f=LiOH%3Dmoles%5Ctimes%20%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D1.108moles%5Ctimes%2023.95g%2Fmol%3D26.54g)
Thus 26.54 g of
will be produced from the given mass.
The two main types of seismic waves are body waves and surface waves. Body waves are broken down into P waves (primary waves) and S waves (secondary waves).
P waves are the fastest and can move through solid rock and liquids. These waves are longitudinal waves.
S waves are slower and can only move through solid rock. These waves are transverse waves.
Scientists used P waves and S waves to determine that part of the core of the earth is liquid. When an earthquake happened, both waves could be detected near the earthquake center, but only P waves (which travel through solids and liquids) could be detected on the other side of the earth. That meant the S waves could not move through the liquid outer portion of the earth's core, while the P waves could.