HESI A2 CHEMISTRY

hesi-a2-chemistry

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Question 1 of 1

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581155

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What is the formula for silver hydroxide?

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581158

300

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Which gives the number of protons in the atomic nucleus of an alkali metal?

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586309

420

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The energy required to remove the outermost electron from an atom is called

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586310

360

none

In the presence of an acid, what color is phenolphthalein?

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586311

420

none

Fifty-six kg of a radioactive substance has a half life of 12 days. How many days will it take the substance to decay naturally to only 7 kg?

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586312

360

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Which compound contains a polar covalent bond ?

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586313

360

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AB----------> A+B represents what type of chemical reaction ?

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586314

360

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Among the following elements, which is a nonmetal ?

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586315

480

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You contain two odorous gases in vials with porous plugs. Gas A has twice the mass of Gas B. Which observation is most likely ?

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586316

360

none

The three important allotrophic forms of phosphorus are red, white and _________________

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571469

420

none

Carbon 12 and carbon 14 are both isotopes. What do they have in common?

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580438

540

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A substance with a pH of 3 is how many times more acidic than a substance with a pH of 5

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580439

540

none

Radioactive isotopes are frequently used in medicine. What kind of half life would a medical isotope probably have?

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580440

420

none

HESI A2 CHEMISTRY

Question 1 of 1

Time Left

What is the formula for silver hydroxide?

Select the correct answer(s).

(0/0)

Which gives the number of protons in the atomic nucleus of an alkali metal?

Select the correct answer(s).

(0/0)

The energy required to remove the outermost electron from an atom is called

Select the correct answer(s).

(0/0)

In the presence of an acid, what color is phenolphthalein?

Select the correct answer(s).

(0/0)

Fifty-six kg of a radioactive substance has a half life of 12 days. How many days will it take the substance to decay naturally to only 7 kg?

Select the correct answer(s).

(0/0)

Which compound contains a polar covalent bond ?

Select the correct answer(s).

(0/0)

AB----------> A+B represents what type of chemical reaction ?

Select the correct answer(s).

(0/0)

Among the following elements, which is a nonmetal ?

Select the correct answer(s).

(0/0)

You contain two odorous gases in vials with porous plugs. Gas A has twice the mass of Gas B. Which observation is most likely ?

Select the correct answer(s).

(0/0)

The three important allotrophic forms of phosphorus are red, white and _________________

Select the correct answer(s).

(0/0)

Carbon 12 and carbon 14 are both isotopes. What do they have in common?

Select the correct answer(s).

(0/0)

A substance with a pH of 3 is how many times more acidic than a substance with a pH of 5

Select the correct answer(s).

(0/0)

Radioactive isotopes are frequently used in medicine. What kind of half life would a medical isotope probably have?

Select the correct answer(s).

(0/0)

When an acid is added to a base, water and a salt form. What kinds of bonds farm on these two compounds ?

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Al(NO3)3 + H2SO4 ---> Al2(SO4)3 + HNO3 is an example of which kind of reaction

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