How many protons are in Si-28

Inner transition metals are composed of which of the following? noble gases halogens metals lanthanides and actinides

Given below are statements that summarize the characteristics of α, β, and γ rays. Identify the characteristics that correspond to each type of radiation. 1. it is symbolized as 4/2 He2. it has the weakest penetrating power3.

What is the molarity of the solution produced when 145 g NaCl is dissolved in sufficient water to prepare 2.75 L of solution? * a. 0.0190 b. 52.7 c. 399 d. 0.902

A sample of magnesium is burned in oxygen to form magnesium oxide. What mass of oxygen is consumed if 74.62 g magnesium oxide is formed from 45.00 g magnesium

Which is given as an example for how the paleozic supercontinent ice cap melted?

Calculate the moles of new H₂ O₂ using the balanced formula below and the average moles of KMnO₄ from calculation #2. The average moles of KMnO₄ is 0.90mol. 2KMnO₄ + 5H₂O₂ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 8H₂O + 5O₂ Edit: I got 2.

How many grams of CaC2 would make 23.6g C2H2?

Shane performed the following trials in an experiment. Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C. Trial 2: Heat 40.0 grams of water at 10.0 °C to a final temperature of 40.0 °C.

According to the law of conservation of ___ in an isolated system the initial total momentum before a collision equals the final total momentum.

What is the correct name fore this formula Al2O3