CHEMISTRY HIGH SCHOOL

Write these numbers rounded to the three nearest significant figures
write these numbers rounded to the three nearest significant figures - 1

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Answer 1
Answer:

Answer:

(a) 52.2 mL helium

(b) 18.0 g nitrogen

(c) 78.5 mg MSG

(d) 23,600,000 mm wavelength

(e) 0.00420 kg lead

Rounded the numbers to three nearest significant figures.

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When you mix sulfur and iron, what do you get?
A closed system initially containing 1×10^-3M H2 and 2×10^-3 at 448°C is allowed to reach equilibrium. Analysis of the equilibrium mixture show s that the concentration of HI is 1.87×10^ -3. Calculate Kc at 448°C for the reaction.
Ca(OH)2 is added to a large beaker of water. How is the solution different from the original water?A...The solution turns blue litmus to red. B...The solution turns phenolphthalein pink. C...The solution has more hydrogen ions. D....The solution has fewer hydroxide ions.

If the pressure on an ideal gas is increased, what will happen to the volume of the gas?

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If the pressure on an ideal gas is increased, the volume of the gas will decrease. This can be predicted with the use of the ideal gas equation which is expressed as: PV = nRT. At constant temperature, we can say that pressure and volume are inversely related. Thus, as one value increase, the other decrease.

450

Explanation:

edxdded gvt  rgt gt tgrtrg

Which of the following are examples of cations? A. SO42- B. HCO3- C. Cl- D. HPO42- E. Ca2+

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D or b but I don't know for sure

You need to make 3-bromo-5-isopropyltoluene starting with m-isopropyltoluene. Supply the reagent needed in the order it is needed and draw the resulting product.

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Answer:

The reagents needed are Br₂ and FeBr₃

Explanation:

In order to make 3-bromo-5-isopropyltoluene starting with m-isopropyltoluene we need to add Bromine (Br₂) and Iron(III) bromide (FeBr₃).

Please see attached picture for the resulting product, 3-bromo-5-isopropyltoluene.

By the way...... what do those symbols for the elements have in common (for number 7-11): Pb, Au, Cu, Hg, Na ? *

Answers

Answer:

Na number of 11

Explanation:

Pb no. 82

Au no. 79

Cu no. 29

Hg no. 80

Answer:

those have symbols for their Latin or Greek name

Explanation:

hope it helps

What is the chemical name of this compound? Na2S:

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Answer:

Actually, its sodium SulFIDE not sodium sulfret

Answer:

Sodium Sulfuret

According to the Arrhenius Theory a base reacts with an acid to produce

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Water. Arrhenius acids provide a H+ ion and a base provides a OH- ion, which react to form water.
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