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3 years ago

If you had a beaker full of black powder which of the following could you have?

2 answers:

8 0

A beaker of black powder can be a mixture with different substances (i.e gunpowder: a mixture of sulfur, charcoal, etc.), an element which can probably be carbon (known as black), and a compound as well which can be potassium nitrate. Hence, the answer is D.

kolbaska11 [484]3 years ago

4 0

Answer:

a. mixture

Explanation:

A black powder probably represents a mixture of several dark colored elements, or several elements that reacted and formed a black colored mixture.

Mixture is the union of two or more different substances (regardless of whether they are simple or compound). It has different and variable (non-fixed) physical characteristics (melting point, boiling point, density, toughness, etc.) compared to its constituent substances.

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The nucleus of a lead atom has a charge of 82 protons what are the drection and magnitude

KATRIN_1 [288]

Answer:

left

Explanation:

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3 years ago

Which of the following is a property of water a. polar molecule b. regulates temperature c.universal solvent d. all of the above

Vladimir [108]

The answer is the letter c

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3 years ago

Read 2 more answers

Which is the Net Ionic Equation for:

arlik [135]

Answer: $2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)$

Explanation:

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and are present in an aqueous state and represented in the form of ions.

Net ionic equation : In the net ionic equations, we do not not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The complete balanced ionic equation will be:

$2Fe^{3+}(aq)+6Cl^-(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+6Cl^-(aq)+2Fe(s)$

In this equation, $Cl^-$ are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be:

$2Fe^{3+}(aq)+3Mg(s)\rightarrow 3Mg^{2+}(aq)+2Fe(s)$

3 0

3 years ago

If an object loses mass, what will happen to its weight?

NeX [460]

Weight will decrease because of the amount of gravitational pull being less

8 0

3 years ago

How many grams would 1.00 billion atoms of sulfur weigh

Zielflug [23.3K]

Answer:

$m_S=5.31x10^{-14}gS$

Explanation:

Hello,

In this case, by knowing that we have 1 billion ( 1,000,000,000) of atoms of sulfur, via the Avogadro's number we can firstly compute the moles:

$n_S=1,000,000,000atoms*\frac{1mol}{6.022x10^{23}atoms}\\\\ n_S=1.66x10^{-15}molS$

Then, by using the atomic mass of sulfur (32 g/mol), we can finally compute the mass:

$m_S=1.66x10^{-15}molS*\frac{32gS}{1molS}\\ \\m_S=5.31x10^{-14}gS$

Best regards.

7 0

3 years ago