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NeX [460]
3 years ago
9

67g of K2O is how many moles

Chemistry
1 answer:
taurus [48]3 years ago
7 0
Follow the formula.. there’s not enough in this question for me to solve
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Aqueous potassium bromide reacts with aqueous silver nitrate AgNO3 to form aqueous potassium nitrate KNO3 and solid silver bromi
ddd [48]
The balanced chemical equation for the reaction  is as below

 KBr (aq) + AgNo3  → KNO3(aq)  + AgBr(s)

  Explanation

    from the equation above  the  stoichiometric  coefficient  before KBr is 1,  before  AgNo3  is 1 ,  before KNO3  is 1  and before AgBr is also 1.  Therefore   1 mole of KBr  reacted with  1 mole of AgNO3  to form 1 mole of KNO3  and 1 mole  of AgBr.

8 0
3 years ago
Read 2 more answers
An aluminum engine block has a volume of 4.77 L and a mass of 12.88 kg. what is the density of the aluminum in grams per cubic c
Whitepunk [10]
12.88 x 1000 = 12,880 g

4.77 x 1000 = 4770 cm³

D =  mass / volume

D = 12,880 / 4770

D = 2.70 g/cm³

hope this helps!
6 0
4 years ago
Pretty Pudgey.. can i get a owaowa?
love history [14]

Answer:

owaowa

Explanation:

6 0
3 years ago
Read 2 more answers
A 80.0 g piece of metal at 88.0°C is placed in 125 g of water at 20.0°C contained in a calorimeter. The metal and water come to
grandymaker [24]

Answer:

The specific heat of the metal is 0.485 J/g°C

Explanation:

<u>Step 1:</u> Data given

Mass of the piece of metal = 80.0 grams

Mass of the water = 125 grams

Initial temperature of the metal = 88.0 °C

Initial temperature of water =20.0 °C

Final temperature = 24.7 °C

pecific heat of water is 4.18 J/g*°C

<u>Step 2:</u> Calculate specific heat of the metal

Qgained = -Qlost

Q =m*c*ΔT

Qwater = - Qmetal

m(water)*c(water)*ΔT(water) = -m(metal)*c(metal)*ΔT(metal)

with mass of water = 125 grams

with c( water) = 4.18 J/g°C

with ΔT(water) = T2-T1 = 24.7 - 20 = 4.7°C

with mass of metal = 80.0 grams

with c(metal) = TO BE DETERMINED

with ΔT(metal) = 24.7 - 88.0 = -63.3 °C

125*4.18*4.7 = -80 * C(metal) * -63.3

2455.75 = -80 * C(metal) * -63.3

C(metal) = 2455.75 / (-80*-63.3)

C(metal) = 0.485 J/g°C

The specific heat of the metal is 0.485 J/g°C

3 0
4 years ago
The energy entering this system is equal to the energy leaving the system. Based on the law of conservation of energy, how many
Alla [95]
The law of conservation of energy is one of the most commonly used principles in physics and chemistry wherein it states that "Energy<span> can neither be created nor destroyed; rather, it transforms from one form to another." Therefore, the energy entering the system, should be equal to the amount of energy leaving the system.</span>
5 0
4 years ago
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