What is significant about the elements within the same group of the periodic table?

How many atoms of Cl are there in 25 moles of Cl (subscript) 2? Can someone show the work and explain this to me I'm so lost

A laser produces 22.0 mW of light. In 3.00 hr, the laser emits 4.53*10^20 photons. What is the wavelength of the laser?

Oct-1-yne (hc≡cch2ch2ch2ch2ch2ch3) reacts rapidly with nah, forming a gas that bubbles out of the reaction mixture, as one product. oct-1-yne also reacts rapidly with ch3mgbr, and a different gas is produced.

Describe the steps to balancing a chemical equation.

What atom has 24 neutrons, and 45 mass

How many grams of mercury are needed to react completely with 157g of sulfur to form hgs?

Calculate the mass of tetraborane (B4 H10) that contains a billion (1.0 x 10 * 9) boron atoms. Be sure your answer has a unit symbol if necessary, and round it to significant digigits.

Starvation and uncontrolled diabetes mellitus can both result in a. ketoacidosis, implying that high levels of ketone bodies in the blood must be well‑tolerated. b.

13. When iron nad is put in to a beaker containing copper sulphate solution. of the solution slowly change in to Green a) Why does the colour of the solution change? b) Write the equation involved in this process?

To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 4.00 molmol of gas DD measured at 251 ∘C∘C in a 1.