Dalam kajian geografi, cara pandang dan cara pikir terhadap objek material dari sudut geografi disebut objek

1 answer:

6 0

Hal di atas disebut sebagai objek: Formal
Objek formal Merupakan cara pandang dan cara pikir terhadap objek material dari sudut geografi. Cara pandang dan cara pikir terhadap objek material dilihat dari segi geografis yang akan melingkupi keruangan, kelingkungan, dan kompleks wilayah,serta waktu.

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Mendeleev’s table of elements was better accepted than those of other scientists at the time because _______________ . Moseley w

disa [49]

Answer:Answer: Mendeleev's table of elements was better accepted than those of other scientists at the time because it predicted correctly the properties of elements that had not yet been discovered. Moseley went a step further in suggesting that the elements be arranged according to atomic number

Explanation:

8 0

3 years ago

Read 2 more answers

. Calculate the mass of O2 produced if 3.450 g potassium chlorate is completely decomposed by heating in presence of a catalyst

Vesnalui [34]

2 KClO3(s) → 3 O2(g) + 2 KCl(s)

Note: MnO2 (Manganese Dioxide) is not part of the reaction. A catalyst lowers the activation energy and increases both forward and reverse reactions at equal rates.

molar mass of KClO3 = 122.5
Moles of KClO3 = 3.45 / 122.55 = 0.028

Moles of O2 produce = $\frac{3}{2} \times 0.028$

= 0.042 moles

molar mass of O2 = 32

so, mass of O2 = 32 x 0.042 = 1.35 g

5 0

3 years ago

How many moles of disulfur decafluoride are present in 3.99 x 104 molecules of this compound? moles

arsen [322]

Answer: The number of moles of disulfur decafluoride is $6.62\times 10^{-20}$

Explanation:

We are given:

Number of disulfur decafluoride molecules = $3.99\times 10^4$

According to mole concept:

$6.022\times 10^{23}$ number of molecules are contained in 1 mole of a compound.

So, $3.99\times 10^4$ number of molecules will be contained in = $\frac{1mol}{6.022\times 10^{23}}\times 3.99\times 10^{4}=6.62\times 10^{-20}mol$ of disulfur decafluoride.

Hence, the number of moles of disulfur decafluoride is $6.62\times 10^{-20}$

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3 years ago

8. The best way to obtain pure, solid household salt from a solid mixture of household salt and sand is to:

dedylja [7]

The best way to obtain pure, solid household salt from a solid mixture of household salt and sand is to "add water, stir, filter and evaporate the filtrate".

Option: C

Explanation:

The salt and sand can be separated on the basis of solubility, as we know the salt is chemically known as sodium chloride, which have good solubility in water. The most general method is the mixture is taken into a flask or beaker and water is added with stirring, where salt get dissolved and sand remain as it is, because NaCl is capable enough to form hydrogen bonding with water, while sand have absence of such property. Then this solution containing insoluble sand is filtered by using filter paper. The sand is received in filter paper while filtrate in beaker is evaporated by boiling it in order to receive salt as residue.

8 0

3 years ago

thank you so much for helping me I don't know science that well trying to get better I've been getting better good grades but st

Rasek [7]

there is not enough information to make a prediction as we dont know what side she taped on magnet C

5 0

3 years ago