Which of the following was most likely NOT present in creating the amino acids of early Earth's water of the past? A. ammonia B. sulfur C. nitrogen D. hydrogen

n the laboratory, two forms of sodium phosphate will be available (the monobasic monohydrate NaH2PO4·H2O, F. W. = 137.99 g/mol, and the dibasic Na2HPO4, F. W. = 141.96 g/mol).

Is a theory a series of questions

Which organs are part of the musculoskeletal system? Check all that apply. bones hair muscles skin tendons nails

In group c, do all four compounds appear to be molecular, ionic, or molecular acids? based on this answer, would you expect them to dissociate?

Which is the largest number? OA. 4.5 x 10^7 OB. 9.9 x 10^6 OC. 5.8 x 10^8 OD. 5.5 x 10^5

Which chemical reaction do plants use to take carbon dioxide out of the air

What are the primary elements of the earths layres?

How long does it usually take fir a rock to undergo a stage within the rock cycle

Calculate the ph of a solution formed by mixing 150.0 ml of 0.10 m hc7h5o2 with 100.0 ml of 0.30 m nac7h5o2. The ka for hc7h5o2 is 6.5 * 10-5.

Lead (ii) carbonate decomposes to give lead (ii) oxide and carbon dioxide: pbco3 (s) ? pbo (s) + co2 (g) how many grams of lead (ii) oxide will be produced by the decomposition of 2.50 g of lead (ii) carbonate?