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Monica [59]
3 years ago
7

Please help with these 4 questions

Chemistry
1 answer:
IrinaK [193]3 years ago
6 0
1.International System of Units<span> (</span>SI), French Système Internationale d'Unités,international<span> decimal </span>system<span> of weights and </span>measures<span> derived from and extending the metric </span>system of units. Adopted by the 11th General Conference on Weights and Measures<span> in 1960, it is abbreviated </span>SI<span> in all languages

2.</span><span>The </span>kilogram<span> is the SI base unit of mass and is equal to the mass of the international prototype of the </span>kilogram<span> , a platinum-iridium standard that is kept at the International Bureau of Weights and Measures 

3.</span>The SI units used to measure temperature are Kelvin, denoted as K.If you want to convert Celsius in to Kelvin just add 273 to the temperature in Celsius.

4.cuz they are dumb


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Is 4atm to big of a difference to get when I use the ideal gas law vs the van der waals equation?
garik1379 [7]

This absolute amount of pressure does not play a significant difference.

At high temperatures and low pressures, its results deviate too little.

But at low temperatures and high pressures, it will change significantly and this difference will change from gas to gas.

In the image you can see the difference between some results from both equations.

4 0
3 years ago
Calculate the standard molar enthalpy for the complete combustion of liquid ethanol (c2h5oh) using the standard enthalpies of fo
olga2289 [7]
Answer : To calculate the standard molar enthalpy of complete combustion of liquid ethanol can be done by using the formula given below;

C_{2}  H_{5}OH + 3O_{2} ----\ \textgreater \   2CO_{2}  + 3 H_{2}O

Now, the enthalpies of the elements in their standard state is zero always. 

So the H_{reaction} =  H_{products}  - H_{reactants}

Here we can avoid the heat of enthalpy of oxygen,carbon dioxide and water as they exists in their standard states.

So the H_{reaction} = H_{ C_{2}H_{5}OH}
6 0
3 years ago
Read 2 more answers
If you are pulling on a box with a force of 30 N, and your friend is pushing the box in the same direction with a force of 30 N,
dmitriy555 [2]

Answer:

The box will move towards me by the additional force of 60N.

Explanation:

I am pulling the box with a force of 30N and my friend is pushing the box in the same direction with a force of 30N.

       Here two forces are exhibited in the same direction that is towards myself as a result the box will move towards me by an additional force of 30N+30N=60N.

7 0
3 years ago
A pH of 15.0<br> a. is not possible.<br> b. is a base.<br> c. is an acid.<br> d. is a neutral.
Serga [27]
A. Is not possible.

The pH scale runs from 0 to 14
8 0
3 years ago
What is the correct name for the compound CoCl3?
nexus9112 [7]

Answer:

Cobalt chloride= D cobalt(111) chloride

5 0
4 years ago
Read 2 more answers
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