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Svet_ta [14]
4 years ago
8

When a scientific investigation runs for several years, which is most likely true?

Chemistry
2 answers:
Bingel [31]4 years ago
4 0

Answer:

1. Many different hypotheses will be tested.

Explanation:

Scientists test every hypothesis they make for their investigation, before moving onto bigger conclusions.

postnew [5]4 years ago
4 0
It’s 2 i think it’s probably but im sure it’s 2
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2Na + Cl2 → 2NaCI<br> How many grams of NaCl will be produced from 33.0 g of Na and 34.0 g of Cl.?
Mademuasel [1]

54.936 grams of NaCl will be produced from 33.0 g of Na and 34.0 g of Cl.

Explanation:

Data given:

mass of Na = 33 grams

mass of Cl_{2} = 24 grams

atomic mass of Na = 23 grams/moles

atomic mass of Cl = 70 grams/mole

mass of NaCl formed =?

atomic mass of NaCl = 58.44 gram/mole

balanced chemical reaction:

2Na + Cl_{2} ⇒ 2NaCl

number of moles = \frac{mass}{atomic mass}

putting the values in the equation:

number of moles of Na = \frac{23}{33}

                                     = 0.69 moles

number of moles of chlorine gas = \frac{34}{71}

                                                        = 0.47 moles

limiting reagent is chlorine gas in the reaction

from the balanced chemical reaction:

1 mole of chlorine gas reacts to form 2 moles of NaCl

then 0.47 moles of chlorine gas will form x moles

\frac{2}{1} = \frac{x}{0.47}

x = 0.94 moles of NaCl is formed.

mass = atomic mass x number of moles

mass = 58.44 x 0.94

         = 54.936 grams of NaCl is produced.

4 0
4 years ago
Calculate the molarity of a solution made by adding 45.4 g of nano3 to a flask and dissolving it with water to create a total vo
aleksandr82 [10.1K]
Solutions are made up of two non reacting species called solute and solvent. The amount of solute in solvent is known as concentration of that solute. Concentration is often measured in Molarity. Molarity is the amount of solute dissolved in 1 dm3 of solution. Answer to your question is as follow;

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Mention 3 types of making bases​
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Answer:

Preparation of Bases

By the direct union of a metal with oxygen Some metals when heated in air or oxygen form the oxides of the metals. ... By the action of water or steam on some active metals Some active metals like sodium and potassium react with cold water to form hydroxides with the evolution of hydrogen gas.

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Which of the following best explains why the volume of an inflated balloon
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