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satela [25.4K]
2 years ago
8

Can anyone explain why the mongols invaded russia?

Chemistry
2 answers:
Gelneren [198K]2 years ago
7 0

Answer:

It all started when Genghis Khan (1155-1227), the founder of the Mongol Empire, sent his son Jochi (1182-1227) to conquer the lands of what is now Siberia, Central Russia, and Eastern Europe. Giant armies of Mongol warriors (clearly over 100,000, an enormous number in the 13th century) easily defeated the weak and ill-numbered forces of the Russian princes, who were at war with each other before the invasion.

In 1237, the Mongols, led by Batu Khan, invaded Rus’. They took, ravaged and burned Ryazan’, Kolomna, Moscow, Vladimir, Tver – all the main Russian cities. The invasion continued until 1242 and was a terrible blow for the Russian lands – it took almost 100 years to fully recover from the damage the Mongol army did. Also, the lands and cities of the South – Kiev, Chernigov, Halych were burned to the ground. The North-Eastern lands, most notably Tver, Moscow, Vladimir, and Suzdal became the main cities after the invasion.

However, the Mongols didn’t want to conquer the land fully – they just wanted stable tributes. And they knew how to get what they wanted.

Explanation:

Svetach [21]2 years ago
5 0

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-Dominant- [34]

Answer:

poems dont neccesarily have to ryhm, just have a rythm and make sure it talks about cells and it'll be fine. or go with a haiku, those are really easy to write

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2 years ago
Perform unit conversions and determine Re for the case when a fluid with density of 92.8 lbm/ft3 and viscosity of 4.1 cP (centip
erastovalidia [21]

Answer:

Re=309926.13

Explanation:

density=92.8lbm/ft3*(0.45kg/1lbm)*(1ft3/0.028m3)=1491.43kg/m3

viscosity=4.1cP*((1*10-3kg/m*s)/1cP)=0.0041kg/m*s

velocity=237ft/min*(1min/60s)*(0.3048m/1ft)=1.2m/s

diameter=28inch*(0.0254m/1inch)=0.71m

Re=(density*velocity*diameter)/viscosity=(1491.43kg/m3*1.2m/s*0.71m)/0.0041kg/m*s

Re=309926.13

4 0
3 years ago
What Communication system do submarines use ?
PolarNik [594]

Answer:

uh

Explanation:

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7 0
2 years ago
Suppose you are a food chemist working for a company that makes and manufactures soda. Your job is to create a new soft drink wi
Mekhanik [1.2K]

Answer:

The answer to your question is given after the questions so I just explain how to get it.

Explanation:

a)

Get the molecular weight of Phosphoric acid

        H₃PO₄ =  (3 x 1) + (31 x 1) + (16 x 4)

                    = 3 + 31 + 64

                    = 98 g

         98 g -----------------  1 mol

      0.045 g ---------------   x

          x = (0.045 x 1) / 98

          x = 0.045 / 98

          x = 0.00046 moles or 4.6 x 10 ⁻⁴

b)

Molarity = \frac{moles}{volume}

Molarity = \frac{0.00046}{0.35}

Molarity = 0.0013 or 1.31 x 10⁻³

c)

Formula            C₁V₁ = C₂V₂

                              V₁ = C₂V₂ / C₁

Substitution

                              V₁ = (0.0013)(1) / 0.01

Simplification and result

                              V₁ = 0.0013 / 0.1

                              V₁ = 0.13 l = 130 ml            

7 0
3 years ago
A 3.31-g sample of lead nitrate, Pb(NO3)2, molar mass = 331 g/mol, is heated in an evacuated cylinder with a volume of 2.53 L. T
Dahasolnce [82]

Answer:

0.486atm is the pressure of the cylinder

Explanation:

1 mole of Pb(NO₃)₂ descomposes in 4 moles of NO2 and 1 mole of O2. That is 1 mole descomposes in 5 moles of gas.

To find the pressure of the cylinder, we need to find moles of gas produced, and using general gas law we can determine the pressure of the gas:

<em>Moles Pb(NO₃)₂ and moles of gas:</em>

3.31g * (1mol / 331g) = 0.01 moles of Pb(NO₃)₂.

That means moles of gas produced is 0.05 moles.

<em>Pressure of the gas:</em>

Using PV = nRT

P = nRT/V

<em>Where P is pressure (Incognite)</em>

<em>V is volume (2.53L)</em>

<em>R is gas constant (0.082atmL/molK)</em>

<em>T is absolute temperature (300K)</em>

And n are moles of gas (0.05 moles)

P = 0.05mol*0.082atmL/molK*300K / 2.53L

P = 0.486atm is the pressure of the cylinder

3 0
3 years ago
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