All categories

3 years ago

A. A student was given an unknown sample of a pure metal to identify. Its mass was 116

Chemistry

1 answer:

forsale [732]3 years ago

3 0

Answer:

Silver

Explanation:

Given parameters:

Mass = 116g

Energy = 511J

Initial temperature = 21.6°C

Final temperature = 40.5°C

Unknown:

Specific heat capacity and the type of metal = ?

Solution:

To solve this problem, we need to find the specific heat capacity of the metal given,

H = m x c x Ф

H is the energy

m is the mass

c is the specific heat capacity

Ф is the change in temperature

511 = 116 x c x (40.5 - 21.6)

511 = 2192.4c

c = 0.233J/g°C

The specific heat capacity of silver is similar to this.

You might be interested in

A 0.2722 g sample of a pure carbonate, X n CO 3 ( s ) , was dissolved in 50.0 mL of 0.1200 M HCl ( aq ) . The excess HCl ( aq )

Alex73 [517]

Answer:

0.00369 moles of HCl react with carbonate.

Explanation:

Number of moles of HCl present initially = $\frac{0.1200}{1000}\times 50.0$ moles = 0.00600 moles

Neutralization reaction (back titration): $NaOH+HCl\rightarrow NaCl+H_{2}O$

According to above equation, 1 mol of NaOH reacts with 1 mol of 1 mol of HCl.

So, excess number of moles of HCl present = number of NaOH added for back titration = $\frac{0.0980}{1000}\times 23.60$ moles = 0.00231 moles

So, mole of HCl reacts with carbonate = (Number of moles of HCl present initially) - (excess number of moles of HCl present) = (0.00600 - 0.00231) moles = 0.00369 moles

Hence, 0.00369 moles of HCl react with carbonate.

3 0

3 years ago

represent rutheniums first 36 electrons using the chemical symbol for krypton written inside the brackets

kirza4 [7]

Answer:

[kr] hd^75s^1

Explanation:

7 0

3 years ago

Read 2 more answers

Magnesium and copper react with dilute acids to make salts and hydrogen gas<br> True<br> False

omeli [17]

Answer:

True

Explanation:

magnesium and copper react with dilute acids to make salts and hydrogen gas

5 0

3 years ago

How do I calculate the moles consumed in a vinegar titration?

Shtirlitz [24]

Answer: Use the titration formula

Explanation:

8 0

3 years ago

How many kilograms of oseltamivir would be needed to treat all the people in a city with a population of 400000 people if each p

enyata [817]

Answer:

300 kg

Explanation:

The give parameters obtained from a similar question are;

The mass of oseltamivir per capsule = 75 mg

The mass of oseltamivir required, <em>M</em>, is given as follows;

M = The mass of oseltamivir per capsule × The mass taken per person per day × 5 days × The number of people in the city

M = 0.75 mg/capsule × 2 capsule/(day·person) × 5 days × 400,000 people

M = 300,000,000 mg = 300 kg

6 0

3 years ago