1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mila [183]
3 years ago
12

How many grams of potassium nitrate (KNO3) would form if 2.25 liters of a 1.50 molar lead nitrate Pb(NO3)2 solution reacts with

1.15 liters of a 2.75 molar potassium chromate K2CrO4 solution? Pb(NO3)2 + K2CrO4 PbCrO4 + 2KNO3 108 g 681 g 639 g 362
Chemistry
1 answer:
fgiga [73]3 years ago
4 0
I know that the answer is 639 g
You might be interested in
Help me with this question I’m kind of struggling
larisa86 [58]

All i know that we are HOOman

3 0
2 years ago
Read 2 more answers
Which of the following represents a pair of isotopes?
Nonamiya [84]
B.
Isotopes is an atom has same number of electrons and protons but different number of neutron.
3 0
3 years ago
1. One of the substances in a new alkaline battery is composed of 63.0% manganese and 37.0% oxygen by mass. Determine the empiri
Nutka1998 [239]
<span>Divide each % value by respective atomic mass  
Mn = 63.0/54.94 = 1.1467 
O = 37/16 =2.3125 
Divide by smaller value 
Mn = 1  
O = 2.3125/1.1467 = 2 Empirical formula = MnO2</span>
4 0
2 years ago
Calculate the standard enthalpy of formation of liquid methanol, CH3OH(l), using the following information: C(graphite) + O2 --&
Darya [45]

Answer : The standard enthalpy of formation of methanol is, -238.7 kJ/mole

Explanation :

Standard formation of reaction : It is a chemical reaction that forms one mole of a substance from its constituent elements in their standard states.

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The formation reaction of CH_3OH will be,

C(s)+2H_2(g)+\frac{1}{2}O_2\rightarrow CH_3OH(g)    \Delta H_{formation}=?

The intermediate balanced chemical reaction will be,

(1) C(graphite)+O_2(g)\rightarrow CO_2(g)    \Delta H_2=-393.5kJ/mole

(2) H_2(g)+\frac{1}{2}O_2(g)\rightarrow H_2O(l)    \Delta H_3=-285.8kJ/mole

(3) CH_3OH(g)+\frac{3}{2}O_2(g)\rightarrow CO_2(g)+2H_2O(l)     \Delta H_1=-726.4kJ/mole

Now we will reverse the reaction 3, multiply reaction 2 by 2 then adding all the equations, we get :

(1) C(graphite)+O_2(g)\rightarrow CO_2(g)    \Delta H_1=-393.5kJ/mole

(2) 2H_2(g)+2O_2(g)\rightarrow 2H_2O(l)    \Delta H_2=2\times (-285.8kJ/mole)=-571.6kJ/mol

(3) CO_2(g)+2H_2O(l)\rightarrow CH_3OH(g)+\frac{3}{2}O_2(g)     \Delta H_3=726.4kJ/mole

The expression for enthalpy of formation of C_2H_4 will be,

\Delta H_{formation}=\Delta H_1+\Delta H_2+\Delta H_3

\Delta H=(-393.5kJ/mole)+(-571.6kJ/mole)+(726.4kJ/mole)

\Delta H=-238.7kJ/mole

Therefore, the standard enthalpy of formation of methanol is, -238.7 kJ/mole

6 0
3 years ago
Please help me out !!
AfilCa [17]

Why I cant help:

I put my pc screen in full zoom and still cant see the question

How I can:

Tell me the question

6 0
2 years ago
Other questions:
  • Solar, wind, and water power are renewable resources and can replace our dependence on fossil fuels. They each have their own dr
    10·1 answer
  • What are the four main sources of fresh water on earth
    14·1 answer
  • When factor is change when a pure element becomes an ion?
    10·1 answer
  • !!!!!!!!!! When atoms in covalent bond share electrons equally, the bond is said to be blank
    11·1 answer
  • When the partition is removed, the gas expands and fills both compartments. How many moles n of gas were initially contained in
    6·1 answer
  • What is the formula for CO3 2- and Al3+ ?
    5·2 answers
  • A decomposition reaction, with a rate that is observed to slow down as the reaction proceeds, has a half-life that does not depe
    8·1 answer
  • Copper can be shaped into wires because it is
    9·1 answer
  • A The birthrate is higher than the death rate.
    5·1 answer
  • Hey!!! Chemistry Question about MOLES... Please help...
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!