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viva [34]
3 years ago
11

Is sidewalk cement an element or a compound?

Chemistry
2 answers:
dimaraw [331]3 years ago
7 0

Answer:

compound

Explanation:

the reasoning is because cement is made from many other elements combined such as water sand and pre mix.

hram777 [196]3 years ago
6 0

Answer:

Cement is a compound mixdure, so cannot be an element.

Explanation:

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-1 is the charge that results.
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what would you be most likely to measure by immersing an object in waterand seeing how much the water level risies
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Measuring the volume of a object.
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The density of seawater increases as temperature __________ and salinity __________.
Marianna [84]

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1 year ago
A container holds 6.4 moles of gas. hydrogen gas makes up 25% of the total moles in the container. if the total pressure is 1.24
klio [65]
The total pressure of the mixture of gases is equal to the sum of the pressure of each gas as if it is alone in the container. The partial pressure of a component of the mixture is said to be equal to the product of the total pressure and the mole fraction of the component in the mixture.

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6 0
3 years ago
Read 2 more answers
(You do) If you have 47.2 mol of Na available, along with an excess of Cl₂, how many grams of NaCl can you produce?
IrinaVladis [17]

Answer:

2,760 grams NaCl

Explanation:

To find grams of NaCl, you need to (1) convert moles of Na to moles of NaCl (via mole-to-mole ratio from reaction) and (2) convert moles of NaCl to grams (via molar mass from periodic table). The final answer should have 3 significant figures based on the given measurement.

2 Na + Cl₂ --> 2 NaCl

Molar Mass (NaCl) = 22.99 g/mol + 35.45 g/mol

Molar Mass (NaCl) = 58.44 g/mol

47.2 moles Na           2 moles NaCl              58.44 grams

----------------------  x  ---------------------------  x  -------------------------  =
                                   2 moles Na                   1 mole NaCl

= 2,758.368 grams NaCl

= 2,760 grams NaCl

5 0
2 years ago
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