A group of scientists is conducting an investigation to study the conductivity of
perovskite. At which temperature do they need to perform the experiments for
perovskite to conduct electric current?
A. T = 1980°C
B. T > 1980°C
C. T 21980°C
D. T< 1980°C

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?