Give the number of significant figures in this number: 40

Nick and Kel reacted 2.80 g of NiCl2· 6 H2O with 7.00 mL of 4.00 M C2H8N2. They recovered 2.40 g of product, [Ni (C2H8N2) 3] Cl2. At the end, the filtrate was a dark blue solution.

Giant piles of mining waste are called the? Drainage spoils or drifts

What was the normal perception of a scientist up until the seventeenth century

If the caffeine concentration in a particular brand of soda is 2.85 mg/oz, drinking how many cans of soda would be lethal? Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.

The density of glycerin is 1.26g ml. Calculate the mass in gram of 0.470L of glycerin

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.

What element has the electron arrangement 2,8,4?

If you get pregnant in Dec how long will it take for u to get to second trimester