All categories

3 years ago

What causes the plates of the lithosphere to move?

Chemistry

1 answer:

Andreyy893 years ago

5 0

Answer:

Explanation:

The plate 'float' on top of the liquid magma. There are convection currents that circulate through the magma, and the techtonic plates are moved along with the magma.

You might be interested in

"which of these nitrogen compounds is in the most reduced state?"

gtnhenbr [62]

Because I can't see your options, all I can say is to look for the one whose numbers can't be simplified any further

8 0

3 years ago

A sample of dry gas weighing 2.1025 g is found to occupy 2.850 L at 22.0oC and 740.0 mm Hg. How many moles of gas are present?

soldi70 [24.7K]

0.11 moles of the gas are present in the sample of dry gas.

Explanation:

Data given:

mass of the gas = 2.1025 grams

volume of the gas = 2.850 litres

temperature = 22 degrees (273.15+22) = 295.15 K

Pressure = 740 mm Hg or 0.973 atm

moles of the gas =?

R = 0.08206 atmL/Mole K

From the ideal gas law the number of moles can be calculated in the sample of dry gas. Number of moles will be determined by the pressure exerted, volume and temperature of the gas.

The formula:

PV = nRT

n = $\frac{PV}{RT}$

putting the values in the above equation:

n = $\frac{2.850 x 0.973}{0.08206 X 295.15}$

= 0.11 moles

0.11 moles of the dry gas is present in the sample given.

4 0

3 years ago

Can someone help me with thins, im to lazy to read rn i did freaking 47 over due homeworkkkk

AysviL [449]

Smh das tough and all and same i got hella overdue

3 0

3 years ago

1. distance = 10 m time = 2 s What is this object's speed?

faust18 [17]

Speed = distance/time
10m/2s = 5m/s
The speed is 5 m/s

8 0

3 years ago

Read 2 more answers

A salt contains only magnesium and one of the halide ions. A 0.0776-g sample of the salt was dissolved in water, and an excess o

sdas [7]

Answer:

The formula of the magnesium halide is MgF₂

Explanation:

All halides, X, produce a salt with Mg with the formula:

MgX₂

-There are 2 moles of the halide ion per mole of Mg-

With the mass of the MgSO₄ we can find moles of magnesium sulfate = Moles Mg.

With moles of Mg we can know the moles of the halide -1 mole Mg = 2 moles of Halide-

And we can find the mass of Mg in the 0.0776g sample. Subtracting we can find the mass of the halide and, with the mass and moles of the halide we can find its molecular weight and its identity:

Moles MgSO₄ -Molar mass: 120.366g/mol- = Moles Mg:

0.150g * (1mol / 120.366g) = 1.2462x10⁻³ moles Mg

Moles halide:

1.2462x10⁻³ moles Mg * 2 = 2.4924x10⁻³ moles Halide

Mass Mg -Molar mass: 24.305g/mol:

1.2462x10⁻³ moles Mg * (24.305g / mol) = 0.0303g Mg

Mass halide:

0.0776g - 0.0303g Mg = 0.0473g

Molecular weight of the halide:

0.0473g / 2.4924x10⁻³ moles =

18.98g/mol

This molecular weight is the molecular weight of Fluoride ion, F⁻,

<h3>The formula of the magnesium halide is MgF₂</h3>

6 0

3 years ago