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zhuklara [117]
3 years ago
15

Limestone is used to make cement and mortar. a. True b. False

Chemistry
1 answer:
marusya05 [52]3 years ago
8 0
The awnser is true maybe
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At 445 °C, Kc = 50.2. If one starts with 0.100 M H2 (g), 0.100 M I2 (g) and 0.0500 M HI (g) what is the equilibrium concentratio
garik1379 [7]
Here's The Answer: <span> K = 50.2 = (2x)^2 / (0.1-x)^2 
x = 0.078
so H2 eq = 0.022 M

Hope this helped! :D
</span>
5 0
3 years ago
Determine the molarity of a solution prepared by dissolving 141.6 g of citric acid , c3h5o(cooh)3 , in water and then diluting t
gogolik [260]
   The molarity  of a solution  prepared  by dissolving  141.6g of citric acid in water is calculated as  below

find the the number  of moles

moles= mass/molar mass

= 141.6 g/ 192 g/mol = 0.738  moles

molarity= moles/molar mass

= 0.738/3500 x1000  = 0.21 M
3 0
3 years ago
A Compound Contains Two or more _______. 
timurjin [86]
A compound contains two or more elements chemically combined

7 0
3 years ago
Read 2 more answers
how many milliliters of 1.50 m hno3 contain enough nitric acid to dissolve an old copper penny with a mass of 3.94 g?
Lerok [7]
Molar mass HNO₃ = 63.0 g/mol

number of moles = 3.94 / 63.0 => 0.0625 moles

Volume = moles / molarity

V = 0.0625 / 1.50

V = 0.04166 L x 1000 = 41.66 mL

hope this helps!

5 0
3 years ago
Correct forms of the equation of Charles’s law is (are)
xxTIMURxx [149]

According to Charles' Law the volume of an ideal gas is directly proportional to its absolute temperature in Kelvin keeping the pressure constant.

V∝ T, P  is constant  

where V, T and P are volume, temperature and pressure

\frac{V1}{T1 } = \frac{V2}{T2}

where V₁, T₁, V₂ and T₂ are initial volume, initial temperature, final volume and final temperature.  

8 0
3 years ago
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