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Virty [35]
3 years ago
9

The specific heat capacity of concrete is 0.880 J/g °C

Chemistry
1 answer:
LenaWriter [7]3 years ago
3 0

Answer:

this is a required answer. look it once.

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If the equilibrium concentration of NO, is 1.78 x 10-2 M, the equilibrium concentration of N2O4 is
padilas [110]

Answer:

The equilibrium lies to the left.

5.42 x 10^-2

Explanation:

3 0
4 years ago
10. A sample of gas occupies 4.00 L at 80.0 kPa at 303 K. How many moles of gas are in the sample? If the sample weighs 20.50 gr
Lunna [17]

Answer:

Moles: n=0.127mol

Molar mass: M=200.61 g/mol

Explanation:

Hello,

In this case, we can use the ideal gas equation to compute the moles of the gas sample as shown below:

PV=nRT\\\\n=\frac{PV}{RT}

Thus, we should use the pressure in atm as follows:

n=\frac{80.0kPa*\frac{0.00986923atm}{1kPa}*4.00L}{0.082\frac{atm*L}{mol*K}*303K}\\ \\n=0.127mol

Moreover, the molar mass is obtained by dividing the given mass by the obtained moles:

M=\frac{m}{n}=\frac{25.50g}{0.127mol}\\  \\M=200.61 g/mol

Best regards.

5 0
4 years ago
50 POINTS WILL MAKE BRAINLIEST!!!!
Bad White [126]

Answer: An example:

Measure the distance between the center of the spreading center (red) and the border between dark yellow and light green (65 Ma point) I measured 2 cm Since the scale on the map is 1 cm = 475 km, calculate the real distance that the plate has moved over the past 65 Ma 2 cm * 475 km/cm = 950 km = 95,000,000 cm = 9.5 * 107 cm Determine the length of time that the plate has been moving65 million years = 65,000,000 years = 6.5 * 107 yearsUse the above equation to calculate spreading rateR = d/t or R = 9.5 * 107 cm / 6.5 * 107 years = 1.46 cm/yr

Explanation:

5 0
2 years ago
Why should a hypothesis be testable?
Ierofanga [76]
A. It must be testable in order to be found true or false.
4 0
3 years ago
Is filtration physical or chemical
Lesechka [4]

Answer:

physical

Explanation:

Mixtures can be separated through physical changes, including techniques such as chromatography, distillation, evaporation, and filtration.

8 0
4 years ago
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