Given the balanced equation representing a reaction:

What is the mass of 975 mL of mercury? Its density is 13.5 g/mL

miss Akunina [59]

Answer:

72.22 g

Explanation:

975 mL Mercury× 13.5 g/mL = 72.22 g

7 0

3 years ago

The specific heat of water is 4.18 J/(g⋅∘<br> c. Calculate the molar heat capacity of water.

Xelga [282]

We are given that the specific heat of water is 4.18 J / g °C. We know that the molar mass of water is 18.02 g/mol, therefore the molar heat capacity is:

molar heat capacity = (4.18 J / g °C) * 18.02 g / mol

<span>molar heat capacity = 75.32 J / mol °C</span>

6 0

3 years ago

Read 2 more answers

How many moles are in 2.5 g of N2<br> O 0089 moles<br> 0.18 moles<br> 13 moles<br> 11 moles

alexgriva [62]

<h2>PRACTICE MULTIPLE CHOICE QUESTIONS FROM UNIT 10</h2>

<h3>1.) A cylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon, and 5.00 moles of helium. If</h3>

the gas mixture is at STP, what is the partial pressure of the argon?

(A) 152 torr (B) 228 torr (C) 380. torr (D) 760. torr

2.) Compared to the average kinetic energy of 1 mole of water at 0 oC, the average kinetic energy

of 1 mole of water at 298 K is

(A) the same, and the number of molecules is the same

(B) the same, but the number of molecules is greater

(C) greater, and the number of molecules is greater

(D) greater, but the number of molecules is the same

3.) If the pressure on a given mass of gas in a closed system is increased and the temperature

remains constant, the volume of the gas will

(A) decrease (B) increase (C) remain the same

4.) Which gas has approximately the same density as C2H6 at STP?

(A) NO (B) NH3 (C) H2S (D) SO2

5.) At a temperature of 273 K, a 400. milliliter gas sample has a pressure of 760. millimeters of

mercury. If the pressure is changed to 380. millimeters of mercury, at which temperature will

this gas sample have a volume of 551 milliliters?

(A) 100 K (B) 188 K (C) 273 K (D) 546 K

Get the answers to these questions

Back to the Unit 10 Old Tests Page

Back to the Unit 10 Pag

3 0

3 years ago

Read 2 more answers

Convert 1.03 g/ml to the unit g/m^3

cestrela7 [59]

1030000 i hate to see you waste your points like this. You could have just looked this up on google

8 0

3 years ago

Why is it not important to accurately measure the amount of 6 M HCl you place in your eudiometer tube

MissTica

It is not important to accurately measure the amount of HCl placed in the eudiometer tube since HCl will be added in excess to react with all the moles of Mg.

In gas stoichiometry, through the method of displacement of a liquid (generally water), the gaseous byproduct is collected inside a long, thin graded glass tube called a eudiometer.

If we consider a reaction between Magnesium and Hydrochloric acid to give a product known as magnesium chloride and hydrogen gas, we can have the chemical equation represented as:

$\mathbf{Mg_{(s)} + 2 HCl _{(aq)} \to MgCl_{2(aq)} + H_{2(g)}}$

From the above reaction, for each mole of Magnesium taking place in the reaction, 1 mole of hydrogen gas is also produced.

Thus, we can have a prediction that HCl can always be added in excess in order for us to react to all the moles of solid magnesium, hence, it is not important to measure the moles of HCl since it will be added in excess.

Learn more about gas stoichiometry here:

brainly.com/question/32160?referrer=searchResults

3 0

2 years ago