At the very least, an oxoacid must 1) be an acid and 2) contain oxygen.
Ba(OH)2 (barium hydroxide) is a strong base. HCN, HF, and hydrochloric acid (HCl) don't contain oxygen.
Nitrous acid (HNO2) is an acid, and it contains oxygen. And the acidic hydrogen is bonded to an oxygen. Thus, nitrous acid qualifies as an oxoacid.
I don't know if H2PO4 is a typo; if not, then it would properly be written as H2PO4⁻ since it's the first deprotonation product of phosphoric acid, H3PO4. In any case, H2PO4⁻ is still acidic, albeit weakly, and its acidic hydrogens are bonded to the oxygen atoms. Thus, "H2PO4" would qualify as an oxoacid (for that matter, H3PO4 would also be an oxoacid).
Chloric acid (HClO3) is an acid, and it contains oxygen; its acidic hydrogen is bonded to an oxygen atom. Thus, chloric acid qualifies as an oxoacid.
1. To solve this question, you need to equalize the mass of solute for both solution. The calculation would be:
mass of solute= volume*concentration
mass1=mass2
volume1 * concentration1 = volume2 * concentration2
volume1 * 0.7%= 2L *(1000ml/L) * 0.2%
volume1 = 2000ml * (0.2%/0.7%)
volume1= 571.429 ml
2. Since you already have the volume of stock needed, you just need to subtract it from the total solution volume to count the number of solvents needed.
new solution volume= stock volume + diluting solvent volume
2L * 2000ml/L = 571.429ml + diluting solvent volume
diluting solvent volume= 2000ml- 571.429 ml= 1428.571ml
Due to the law of conservation of energy we know that the energy that heated the surrounding had to have come from the reaction which means that the wood (with oxygen since this is combustion) lost 12000J. The change in energy for the wood is negative. I hope this helps. Let me know if anything is unclear.
Answer:
B. the role of creativity in scientific discovery
Explanation:
Watson and Crick's ball-and-stick model of DNA demonstrates the importance of creativity in science. Creativity involves having a questioning mind that is always searching for answers and which employs logical reasoning to arrive at these answers. After Rosalind Franklin obtained an X-ray diffraction of DNA, Scientists Watson and Crick expanded on this knowledge by creatively organizing ball and sticks in a manner that represenseted the structure of the DNA.
This simple creative act led to more discoveries about the DNA including the facts that their was a pairing wherein Adenine paired with Thymine and Cytosine paired with Guanine. They also found that the DNA structure could be unzipped and that copying was also possible. They used the simple things around them to arrive at this conclusion. This is an example of the importance of creativity in science.
B, it's properly because of convection! Please, correct me if I'm wrong :>
