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gladu [14]
3 years ago
5

Which statement is true?

Chemistry
2 answers:
marin [14]3 years ago
8 0

your answer is c because rocks are NOT ALL THE TIME MADE WITH JUST ONE MINERAL

mihalych1998 [28]3 years ago
3 0
B. Most rocks are composed of single mineral
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If the density of water is 1.00 g/mL and the density of mercury is 13.6 g/mL, how high a column of water in meters can be suppor
dexar [7]

Answer:

The answer to this is

The column of water in meters that can be supported by standard atmospheric pressure is 10.336 meters

Explanation:

To solve this we first list out the variables thus

Density of the water = 1.00 g/mL =1000 kg/m³

density of mercury  = 13.6 g/mL = 13600 kg/m³

Standard atmospheric pressure = 760 mmHg or 101.325 kilopascals

Therefore from the equation for denstity we have

Density = mass/volume

Pressure = Force/Area  and for  a column of water, pressure = Density × gravity×height

Therefore where standard atmospheric pressure = 760 mmHg we have for Standard tmospheric pressure= 13600 kg/m³ × 9.81 m/s² × 0.76 m = 101396.16 Pa

This value of pressure should be supported by the column of water as follows

Pressure = 101396.16 Pa =  kg/m³×9.81 m/s² ×h

∴  h = \frac{101396.16}{(1000)(9.81)} = 10.336 meters

The column of water in meters that can be supported by standard atmospheric pressure is 10.336 meters

4 0
3 years ago
when 0.15 moles of sodium reacts with 0.30 moles of oxygen what is the moles of the product formed when one reagents is used in
Mamont248 [21]

Answer:

0.075 moles of product formed.

Explanation:

Given data:

Number of moles of oxygen = 0.30 mol

Number of moles of oxygen = 0.15 mol

Number of moles of product formed = ?

Solution:

Chemical equation:

4Na + O₂       →    2Na₂O

Now we will compare the moles of Na₂O with oxygen and sodium.

                Na           :           Na₂O

                  4            :              2

                  0.15       :          2/4×0.15 = 0.075 mol

                O₂           :           Na₂O

                  1            :              2

                  0.30       :          2/1×0.30 = 0.6 mol

Less number of moles of Na₂O are produced by sodium thus it will limit the yield of  Na₂O and act as limiting reactant while oxygen is in excess.

3 0
3 years ago
The total pressure for a mixture of N2O4 and NO2 is 1.5atm. If Kp = 7.1 at 25°C, calculate the partial pressure of each gas in t
kondor19780726 [428]

Answer:

N_{2} O_{4} : 0.5 atm and N_{} O_{2} : 1 atm

Explanation:

In order to calculate the partial pressure for each gas , all you need to do is multiply the mole fraction of each gas with the total pressure.

It is given that P_{total} = 1.5 atm

The mole fraction of each gas can be calculated in the following way:

N_{2} O_{4} = moles of N_{2} O_{4} ÷ total moles present = \frac{1}{3}

N_{} O_{2} = moles of N_{} O_{2} ÷ total moles present = \frac{2}{3}

Partial pressure of N_{2} O_{4} : 1.5 × \frac{1}{3} = 0.5 atm

Partial pressure of N_{} O_{2} : 1.5 × \frac{2}{3} = 1 atm

Hope that answers the question, have a great day!

6 0
3 years ago
Calculate the pH of a buffer formed by mixing 85 mL of 0.13 M lactic acid with 95 mL of 0.16 M sodium lactate.
ankoles [38]
Lengthy problem. I have attached a paper with the answer.

keep in mind that the way to answer these question depends on the professor's way of teaching it. 

let me know if you don't understand

4 0
3 years ago
A large activation energy is required to break the double bonds of unsaturated hydrocarbons.
Karolina [17]
           ...........................................Yes this is true                                                      









5 0
3 years ago
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