20. An atom has a mass of 50 and 20 protons. How many

neutrons does it have?

Answer:

How many liters of 0.775 m solution can be prepared from 55.0 g of ammonium iodide?

A chocolate chip cookie can be separated by physical means, and it is not the same throughout. How would it be classified? as an element as a compound as a homogenous mixture as a heterogeneous mixture

3. If you have 20.00 moles of potassium carbonate, how many grams of potassium carbonate do you have?

If we have 15 g of the first reactant and 15 g of the second reactant how many total grams mass

How many molecules is in one table spoon of water?

The electronegativity of germanium is 1.8; that of bromine is 2.8 on the Pauling scale. Will they form an ionic bond?

N which of the following situations would a spring scale be used? A. a study of the effect of different fertilizers on plant growth B. an investigation of the efficiency of different simple machines C.

The solubility of acetanilide in hot water (5.5 g/100 ml at 100∘C) is not very great, and its solubility in cold water (0.53 g / 100 ml at 0 ∘C) is significant. What would be the maximum theoretical percent recovery from the crystallization of 5.

How many liters of space are in 4.00x10^22 of O2 occupy at STP

Which of the following phases of matter takes the shape of its container and has definite volume? Question 1 options: plasma solid gas liquid