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3 years ago

11

Help Please and answer correctly otherwise, I can report the answer and your account so make sure the answer is correct BUT PLEA

SE HELP ME I AM BEGGING. BRAINLY PLEASE PUT ME AT THE TOP OF THE PAGE PLEASE.

1 answer:

Alina [70]3 years ago

8 0

Answer:

G

Explanation:

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What is the density of an object that has a mass of 350 g and a volume of 95 cm?? Would

OleMash [197]

Answer:

3.68 grams per cubic centimeter

Explanation:

7 0

3 years ago

Read 2 more answers

The density of a gold nugget is 19.3 g/cm3. If the volume of the gold nugget is 0.00369 L the mass of the nugget is

Sauron [17]

Answer:

The answer to your question is 71.22 g

Explanation:

Data

Density = 19.3 g/cm³

Volume = 0.00369

mass = ?

Formula

Density = $\frac{mass}{volume}$

Solve for mass

mass = density x volume

Process

1.- Convert volume from liters to cubic centimeters

1 l ---------------- 1000 cm³

0.00369l --------- x

x = (0.00369 x 1000 ) / 1

x = 3.69 cm³

2.- Substitution

mass = 19.3 x 3.69

3.- Simplification and result

mass = 71.22 g

6 0

3 years ago

How many liters of hydrogen gas at stp are produced from the reaction of 50.0g of magnesium and 75g of hydrochloric acid

ss7ja [257]

Here's how to do it:

<span>Balanced equation first: </span>
<span>Mg + HCl = H2 + MgCl2 unbalanced </span>
<span>Mg + 2 HCl = H2 = MgCl balanced </span>
<span>Therefore 1 mole Mg reacts with 2 moles Hcl. </span>
<span>50g Mg = ? moles (a bit over 2; you work it out) </span>
<span>75 g HCl = ? moles (also a bit over 2; you work it out) </span>
<span>BUT, you need twice the moles HCl; therefore it is the Mg that is in excess. (you can now work out how many moles are in excess, and therefore how much mg is left over). </span>

<span>So, 2 moles HCl produce 1 mole H2(g) </span>
<span>therefore, the amount of H2 produced is half the number of moles of HCl </span>
<span>At STP, there are X litres per mole of gas (look it up - about 22 from memory) </span>
<span>Therefore, knowing the moles of H2, you can calculate the volume</span>

8 0

4 years ago

Electrons in an excited state are more likely to enter into chemical reactions.

guajiro [1.7K]

Answer:

False

Explanation:

The electrons are excited because:

1.- They posses more energy than the basal form, but this doesn´t mean that they can easily react, remember, the electrons are the outside part of an atom.

2.- By the time, this electrons are loosing their energy, that mean that they return to the basal form.

3 0

3 years ago

Phosphorus pentachloride reacts with water to form hydrochloric acid and phosphoric acid. How many total moles of acid are forme

klio [65]

Answer:

0,13 moles of acid are produced

Explanation:

The reaction of the problem is:

PCl₅ + 4H₂O → 5HCl + H₃PO₄

Based on the reaction, 1 mole of PCl₅ produces 6 moles of acid (5 moles of HCl + 1 mole of H₃PO₄).

The molecular mass of PCl₅ is:

1P = 30,97g/mol + 5Cl = 5×35,45g/mol = <em>208,24 g/mol</em>

That means 4,5g of PCl₅ are:

4,5g PCl₅×(1mol / 208,24g) = 0,0216 moles of PCl₅. As 1 mole of PCl₅ produces 6 moles of acid, 0,0216 moles of PCl₅ produce:

0,0216 moles PCl₅ × (6 moles acid / mole of PCl₅) =

<em>0,13 moles of acid are produced</em>

I hope it helps!

3 0

3 years ago