True or False? SLOW moving water deposits sediment.

Difine the term compound

AlexFokin [52]

Answer:

Its when like two pure substances are like combined into one.

Explanation:

8 0

2 years ago

If ine mole of pennies were divided amung 250 million peoplein

Airida [17]

Answer:

$2.4088\times 10^{13}$ dollars each person will receive.

Explanation:

Number of people in which 1 mole of pennies is distributed = 250 million =

$1 million = 10^6$

250 million = $2.5\times 10^8$ persons

Number of pennies in 1 mole = $6.022\times 10^{23}$

Pennies per person:

$\frac{6.022\times 10^{23} pennies}{2.5\times 10^8 persons}=2.4088\times 10^{15} pennies/person$

1 penny = 0.01 $

$2.4088\times 10^{15} pennies/person=2.4088\times 10^{15}\times 0.01 \$/person=2.4088\times 10^{13} \$/person$

$2.4088\times 10^{13}$ dollars each person will receive.

7 0

3 years ago

Draw the structures of methyl oleate and propylene glycol. Which one is more polar, and how can you tell

Afina-wow [57]

1234567891011121314151617181920

5 0

2 years ago

The burning of magnesium is a highly exothermic reaction. How many kilojoules of heat are released when 0. 75 mol of Mg burn in

alexandr402 [8]

Taking into account the definition of enthalpy of a chemical reaction, the quantity of heat released when 0.75 moles of Mg are burned is 451.5 kJ.

<h3>Enthalpy of a chemical reaction</h3>

The enthalpy of a chemical reaction is known as the heat absorbed or released in a chemical reaction when it occurs at constant pressure. That is, the heat of reaction is the energy that is released or absorbed when chemicals are transformed into a chemical reaction.

The enthalpy is an extensive property, that is, it depends on the amount of matter present.

<h3>Heat released in this case</h3>

In this case, the balanced reaction is:

2 Mg(s) + O₂ (g) → 2 MgO(s) + 1204 kJ

This equation indicates that when 2 moles of Mg reacts with 1 mole of O₂, 1204 kJ of heat is released.

When 0.75 moles of Mg are burned, then you can apply the following rule of three: if 2 moles of Mg releases 1204 kJ of heat, 0.75 moles of Mg releases how much heat?

$heat=\frac{0.75 moles of Mgx1204 kJ}{2 moles of Mg}$