Answer: D. Insects
Fossils that are preserved in the Burgess Shale are mostly the remains of soft-bodied organisms.
So the answer is D because insects don’t really have bones like the rest of the other options. They have exoskeletons which protects their organs and gives them support for moving around.
I think D im not completely sure
Answer:
992.302 K
Explanation:
V(rms) = 750 m/s
V(rms) = √(3RT / M)
V = velocity of the gas
R = ideal gas constant = 8.314 J/mol.K
T = temperature of the gas
M = molar mass of the gas
Molar mass of CO₂ = [12 + (16*2)] = 12+32 = 44g/mol
Molar mass = 0.044kg/mol
From
½ M*V² = 3 / 2 RT
MV² = 3RT
K = constant
V² = 3RT / M
V = √(3RT / M)
So, from V = √(3RT / M)
V² = 3RT / M
V² * M = 3RT
T = (V² * M) / 3R
T = (750² * 0.044) / 3 * 8.314
T = 24750000 / 24.942
T = 992.302K
The temperature of the gas is 992.302K
Note : molar mass of the gas was converted from g/mol to kg/mol so the value can change depending on whichever one you use.
If nitrogen monoxide (NO) is added to 2SO2(g) + O2(g) → 2SO3(g),
it will react with O2 and decrease the reaction rate by lowering the amount of O2. So the answer is C. NO decreases collisions between the SO2 and O2 molecules.
The correct answer is B_2F_6, Al_2Cl_6
The Boron group family, or Group 3A(13), consists of the following elements:
- Boron
- Aluminum
- Gallium
- Indium
- Thallium
It is discovered that the members of the boron family all exhibit similar chemical and physical characteristics. Additionally, boron's characteristics are distinct from those of the other group members due to its smaller size and lack of a d orbital. The classification of boron's anomalous features is the result of these anomalies in its physical characteristics.
The patterns in the electron configuration and a few of the elemental features of the boron group are noteworthy. Boron differs from the other group members in terms of its metallic bonding refractivity, reluctance, and hardness.
Examples:
Due to its tiny size and high charge density, boron is an electron-deficient molecule.
example. B2F6
Al2Cl6
To learn more about Group 3A(13) refer the link :
brainly.com/question/28305714
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