An element x is found to have a mass number of 31 and atomic number of 17. idenrify the group and the period to which it belongs?

For the reaction x2 + y + z → xy + xz, it is found that doubling the concentration of x2 doubles the reaction rate, tripling the concentration of y triples the rate, and doubling the concentration of z has no effect.

What is the density of a substance with a mass of 45.00 g and a volume of 26.5ml?

How do you collect gas over water

If 5.6 moles of O2 react completely how many moles of NO2 will form

What would you need to do to calculate the molality of 10 mol of naci in 200 mol of water

A gamma ray has a very high frequency of about 1019 s-1. what is the wavelength of the gamma ray?

What is the first quantum number of a 1s2 electron in phosphorus, 1s22s22p63s23p3?

What are two objects used to find density

How many helium atoms are there in a helium blimp containing 537 kg of helium? express the number of helium atoms numerically?

Which of the following is a physical of a substance A. Reactivity B. Hardness C. Flammability D. Toxicity