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likoan [24]
3 years ago
9

Which of the following is a mixture? steel water oxygen gold

Chemistry
2 answers:
kati45 [8]3 years ago
5 0
Yes steel because it is physically joined together.
Sholpan [36]3 years ago
3 0
Steel because it is a physical combination of different metals.
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An 80.0 g sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and
harina [27]

Answer:

C=0.596\frac{J}{g\°C}

Explanation:

Hello there!

In this case, according to the first law of thermodynamics it is possible to compute the gained heat by the water as shown below:

Q=\Delta U+W\\\\Q=9185J+346J=9531 J

Thus, it is possible to solve for the specific heat of the gas as shown below:

Q=mC\Delta T\\\\C=\frac{Q}{m\Delta T}=\frac{9531J}{80.0g*(225-25)\°C}\\\\C=0.596\frac{J}{g\°C}

Best regards!

3 0
2 years ago
Calculate the volune, in liters, of 4 mol H2S at 60 degrees celsius and 200 KPa? Show your work 40 pts
jeka94

Answer:

txt and I'm going out of the way for a bit but it will probably take 6th and 6th and then we will have a lot and we will have a lot and we will make it work and I'm not

5 0
3 years ago
For which gases does the ratio of PV to RT equal a constant?
Lisa [10]
Ideal gasses (ideal gas law)
8 0
3 years ago
Why is hydrogen (H) placed with the elements in Group 1A?
Alex787 [66]
It has ns1 electron configuration like the alkali metals. 
6 0
3 years ago
Read 2 more answers
Glucose, a common carbohydrate, is a molecule that contains the elements carbon, hydrogen, and oxygen. Complete combustion of a
lesya [120]

The formation of carbondioxide is given by equation as

C + O2 ----> CO2(g)

As per balanced equation one mole of carbondioxide is obtained from one mole of carbon

if 44 g of CO2 is formed it means it contains 12 g of carbon

if 1g of CO2 is formed it means it contains 12/44 g of carbon

if 0.528g of CO2 is formed it means it contains = 12 X 0.528 / 44 g of carbon

                                                                           = 0.144g of carbon

Similarly for water

H2 + 0.5O2 ---> H2O

so one mole of water is obtained from one mole of H2

if 18g of water is formed it means 2g H2 is present

if 1g of water is formed it means 2/18 g of H2 is present

if 0.216g of water if formed it means 2 X 0.216 / 18g of H2 is present = 0.024g of Hydrogen

In glucose we have Carbon , Hydrogen and oxygen

As given the total mass of sample = 0.360g

Mass of carbon = 0.144 , moles of carbon = 0.144 / 12 = 0.012

Mass of hydrogen = 0.024 , moles of hydrogen = 0.024 /1 = 0.024

mass of oxygen = 0.360 - (0.144+0.024) = 0.192

Moles of oxygen = 0.192 / 16 = 0.012

So mole ratio of C : H : O = 0.012 : 0.024 : 0.012 = 1:2:1

Empirical formula = CH2O

7 0
3 years ago
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