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Likurg_2 [28]
4 years ago
12

How do you know when to put Roman numerals in the name when balancing chemical formulas?

Chemistry
1 answer:
IrinaK [193]4 years ago
4 0
If the element has many numbers on the top right corner, you put the roman numeral. For example, iron has +2 and +3. you need to specify which iron ion you're talking about. Fe (II) or Fe (III)
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A. what mass of chromium would be produced from the reaction of 57.0 g of potassium with 199 g of chromium (ii) bromide accordin
Sunny_sXe [5.5K]

Answer:

2 K + 1 CrBr2 yield 2 KBr + 1 Cr

Explanation:

5 0
4 years ago
"Nucleic acid was isolated by lysing cells in detergent, guanidine isothiocyanate, and DNAse, followed by extraction in an acid
Romashka [77]

Answer:

RNA

Explanation:

The nucleic isolated was quantified by 2 types of fluorescent dyes, which binds only to specific type of nucleic acid. You can find the information on the specificity of dyes on your labsheet or dye supplier's website. For our dyes, however:

  • SyBr Green II only emits fluorescent light when it binds to RNA or Single Strand DNA
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With these information, we know that our nucleic acid is either single strand DNA or RNA, however, it is also mentioned that

"Nucleic acid was isolated by lysing cells in detergent, guanidine isothiocyanate, and DNAse"

DNAse, which is an enzyme that breaks down DNA, destroys any extracted DNA during the process, thus, the only possible nucleic acid we have isolated is RNA

8 0
4 years ago
If you need to reverse the following reaction and multiply it by 2 in order for it to be an intermediate reaction in a Hess's la
k0ka [10]
The reaction is:
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O; ΔH = 1410 kJ

When we reverse this reaction, the sign of the enthalpy  change, ΔH, will be changed. The enthalpy change for the reversed reaction would be 1,410 kJ.
Next, we must also multiply the reaction by 2, so the final enthalpy change for the reverse reaction will be:

ΔH = 2,820 kJ
4 0
4 years ago
Word equation for k(s)+H2O(l) yield KOH(aq) + H2(g)
KATRIN_1 [288]
Two moles of potassium react with 2 moles of water to form two moles of potassium hydroxide and 1 mole of hydrogen gas.  The number of moles of hydrogen gas produced is half the number of moles of water and potassium that react together.

The molar mass of...

4 0
3 years ago
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Four of the following pairs of acids list the weaker acid at the left and the stronger acid at the right. Which pair is reversed
atroni [7]

Answer:

d. pair

Explanation:

because,H3PO4 is a strong acid

6 0
3 years ago
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