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What is true about the periodic table shown below. Arrow A is pointing to the alkaline earth metals Arrow A is pointing to the transition metals Arrow B is pointing to halogens

What is the mass, in grams, of 0.390 moles of sodium?

In terms of diversification, both the DIA ETF and the SPY ETF are sufficiently diversified.  Is this True or False? Please explain why.

Determine if the following statements are True or False.  Formation of water from hydrogen gas and oxygen gas is a chemical change. [1] Chromium melting at 2000 oC is a physical change. [2] Water freezing on a sidewalk during a snowstorm is a chemical change. [3]

An unknown compound has a measured mass of 45.00 g and volume of 11.60 mL. Using the chart below, which is most likely the identity of the unknown compound? Densities Compound Density (g cm-3) A 1.298 B 3.879 C 9.312 D 4.816 E 7.219  

Perform the calculation below and choose the answer with the correct number of significant figures.

In order to receive credit for this problem you must   solve it using dimensional analysis  show all your work and   your work must be legible, well organized and easy to follow.  to the correct number of significant figures and units Once you complete the question show it to camera on HONORLOCK then go upload an image to Exam 1 Fall 2025 Free Response Upload.   A sheet of platinum (Pt) has a surface area of 88.0 in2. How many atoms of platinum would be in a single sheet of platinum, if there is 0.0896 g of Pt/cm2?   

Which of the following is/are correct? 40500 has 5 significant figures. 6.730 has 4 significant figures. 3.20 x 10-3 has 2 significant figures.

The Egyptians had a system of land measurement which was later inherited by the Greeks and later on used by the Romans. If a landowner in ancient Egypt had 2.85 x 103 Egyptian cubits of land, how many millimeters is that stretch of land 1 Egyptian finger = 18.75 mm 2 Egyptian cubits = 55 Egyptian fingers

What is the molar mass of calcium sulfite, CaSO3?