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Luba_88 [7]
3 years ago
13

Please i need the answer im dying here ;-

Chemistry
2 answers:
ELEN [110]3 years ago
8 0

Answer:

anawer is none of the above

Serggg [28]3 years ago
7 0

Answer:

i think none of the above is the answer

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1. What is the molarity of a solution which contains 0.256 mol of a substance dissolved in 143 mL of solution.
LenaWriter [7]

Answer:

The equation for molarity is moles/liter for the first question you would do 0.256/0.143 liters to get 1.790 mol/L

Explanation:

The second problem you would do need to find the moles of NaCl which you would do by doing 4.89 g/58.44g/mol= 0.08367 then do 0.08367/0.600= 0.139 mol/L

The third problem would be the same steps as the second one.

The fourth problem would be (0.460M)(5.50L)= 2.53 moles

4 0
3 years ago
Which alkane is the isomer of butane called 2-methylpropane? A skeletal model of a 4-carbon chain has a straight line extending
solmaris [256]

Answer:

A three-carbon chain has a straight line extending from the center carbon.

Explanation:

Isomers are compounds having the same molecular formula but different structural formulas.

Butane and 2-methylpropane are constitutional isomers. Constitutional isomers differ in the way that the constituent atoms are connected to each other.

Butane is a straight chain compound while the compound 2-methylpropane consists of a three-carbon chain which has a straight line extending from the center carbon.

8 0
3 years ago
Read 2 more answers
How many grams of CO2 are used when 7 g of oxygen are produced
lara [203]
308 grams of co2 is used
4 0
3 years ago
How do scientists classify intrusive igneous features? according to shape, texture, and their distance from the nearest volcanic
Nataliya [291]

according to shape, size, and their relationship to surrounding layers of rock

Explanation:

Scientists classify intrusive features according to their shape, size and relationship to surrounding layers of rocks.

Intrusive igneous features are the sills, di/kes, batholith, laccoiith, lopolith e.t.c

  • When magma cools and solidifies within the earth crust, they form intrusive igneous rocks.
  • Intrusive igneous rocks differs from one another in their shape, size and relationship to surrounding rocks.
  • For example, batholith is a large intrusive body that extends for several kilometers in the earth surface.
  • Sills and di/kes are smaller bodies. Sills forms parallel to orientation of rocks in an area. Di/kes are known to cut across the orientation.

Learn more:

Sedimentary rocks brainly.com/question/2740663

#learnwithBrainly

6 0
3 years ago
2Na + CaF2à 2NaF + Ca is an example of a _________ chemical reaction.
marusya05 [52]
<span>2 Na + CaF</span>₂<span> = 2 NaF + Ca

is an example of a </span>single- replacement

answer D

hope this helps!
6 0
3 years ago
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