Which element comes first in a chemical formula?

A-Those with positive oxidation numbers.

B-Those with negative oxidation numbers.

C-The first element is always a metal.

D-The first element is always a nonmetal.

A uniforn half metre rule is pivated at its 30cm mark. A mass of 50g hung at the 45cm mark keeps the rule horizontal. determine the mass of the half metre rule

If a wave has a frequency of 4 Hz and a speed of 24 m/s, which is its wavelength?

What gas law looks at the relationship between volume and temperature? A) Boyle's Law B) Charles' Law C) Gay Lussac's Law

A zebra starts from rest and accelerates at 1.9 m/s how far has a zebra gone in five seconds

A moving electron enters an electric field. The initial velocity of the electron is in the same direction as the electric field. How will the electric field affect the motion of the electron? A.

Use the data from the table to calculate the average rate of change of martian temperature t with respect to time t over the interval from 8:07 am to 9:34 am. (round your answer to three decimal places.)

Determine el valor de la potencia electrica que experimente un circuito cual se somete a 120 voltios emitidos por accion de las cargas electricas que viajan a través de el y que experimentan 4 amperios de intensidad, durante todo el trayecto del

Some wave characteristics depend upon how the wave is produced. other wave characteristics depend upon the properties of the medium.

What is the mass of oxygen in an oxygen tank at 20 C if the tank has a volume of 0.20 m3 and the oxygen pressure in the tank is 4.0 105 N/m2 (mass of one mole of one mole of oxygen is 16 g and the universal gas constant is 8.

Normal conversation in an office produces a decibel rating of 50 db. how many identical voices could you add without exceeding a sound intensity of 100 db?