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tatiyna
3 years ago
10

What is the atomic mass of gold rounded to the nearest whole number

Chemistry
2 answers:
ira [324]3 years ago
3 0
The answer is 197
Hope I helped
elixir [45]3 years ago
3 0
Hello.

The atomic mass of gold is 196.96657u. In order to round to the nearest whole number, we must look one place to the right of that place value. If that number has a value of 5 or higher, we can round up.

For example;
1.54; round to the nearest whole number.
Since the place value to the right (tenths) has a value of 5 or higher, we can round our whole number up to 2.00.

Let's apply this information to our current problem.
196.96657; round to the nearest whole number.
The whole number is "196", so let's take a look at the place value to the right of "6" - it is 9. As it is higher than 5, we can round our whole number up by 1.

Our new number is: 197.

Your answer is: 197.

I hope this helps!
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Hydrogen gas at a pressure of 740. mmHg has a volume of 2.00 L at a temperature of 25.0°C. What is the temperature of this gas a
nikdorinn [45]

Answer:

The final temperature of hydrogen gas is  537.63 K.

Explanation:

Given data:

Initial volume = 2.00 L

Initial pressure = 740 mmHg (740/760 = 0.97 atm)

Initial temperature = 25 °C (25 +273 = 298 K)

Final temperature =?

Final volume = 3.50 L

Final pressure = standard = 1 atm

Formula:  

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₁V₁/T₁ = P₂V₂/T₂

T₂  =  P₂V₂T₁  / P₁V₁

T₂ = 1 atm × 3.5 L × 298 K / 0.97 atm × 2.00 L  

T₂ = 1043  atm .L. K / 1.94 atm. L

T₂ = 537.63 K

7 0
3 years ago
Which describes the heliocentric model of the solar system? (1 point)
maw [93]

Answer:

D

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6 0
3 years ago
Why would there be a concern with glaciers melting because of global warming?
vaieri [72.5K]
The correct answer is C. because it could lead to an increase in ocean levels
5 0
2 years ago
How many elements are found in the following chemical equation? K + Cl → KCl A. 1 B. 2 C. 3 D. 0
Gnesinka [82]
K is Potassium
Cl is Chlorine 
There are 2 elements.
5 0
3 years ago
Read 2 more answers
Identify the atomic orbitals in the C-C sigma bond in ethyne (acetylene HC-triplebond-CH)
aleksley [76]

Answer:

Explanation:

A sigma bond is formed  when a hybrid orbital sp overlaps with another hybrid orbital or with s- or  p- orbital

Ethylene has a structural formula of  H - C≡ C- H

At the ground state; we have :

C    | ⇅ |     |↑ | ↑

        2s       2p

At the excited state, we have:

C    | ↑ |     |↑ | ↑ | ↑

the hybrid orbital

C = | ↑ | ↑ |

      2sp

8 0
3 years ago
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