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3 years ago

8

How many grams of barium sulfate are produced if 125 mL of .050 M sodium sulfate are reacted with excess barium nitrate in the f

ollowing reaction?
Ba(NO3)2 + Na2SO4 = BaSO4 + NaNO3

1 answer:

katrin [286]3 years ago

8 0

Answer:

2.79g

Explanation:

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KOH (aq) + HNO(little3) (aq) = KNO(little 3) (aq) + H20 (1)

Yuki888 [10]

The reaction already balanced

<h3>Further explanation </h3>

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:

• 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.

• 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product

• 3. Select the coefficient of the substance with the most complex chemical formula equal to 1

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:

Balancing C, H and the last O

Reaction

KOH (aq) + HNO₃ (aq) ⇒ KNO₃ (aq) + H₂0 (l)

give coefficient

aKOH (aq) + bHNO₃ (aq) ⇒ KNO₃ (aq) + cH₂0 (l)

K : left = a, right = 1⇒a=1

N : left = b, right =1, b=1

H: left = a, right a+b=2c⇒1+1=2c⇒2=2c⇒c=1

KOH (aq) + HNO₃ (aq) ⇒ KNO₃ (aq) + H₂0 (l)⇒ already balanced

5 0

3 years ago

In the force equation, which two variables have a direct relationship? Which two have an indirect/inverse relationship?

zhuklara [117]

Answer:

if the dependent and independent variable go up its direct but if one of them goes up and another goes down its indirect

Explanation:

for example the more mass an object has the less speed it has that's indirect but the less salt you add to water the less time you have to wait for it to boil

i hope this was useful

4 0

2 years ago

iron is made by a reduction of iron oxide with carbon monoxide. Fe2O3+3CO-2Fe+3CO2. Calculate the mass of iron that can be forme

lyudmila [28]

Answer:

Mass = 88.12 g

Explanation:

Given data:

Mass of iron oxide = 126 g

Mass of iron formed = ?

Solution:

Chemical equation:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Number of moles of iron oxide:

Number of moles = mass/molar mass

Number of moles = 126 g/ 159.69 g/mol

Number of moles = 0.789 mol

Now we will compare the moles of iron with iron oxide.

Fe₂O₃ : Fe

1 : 2

0.789 : 2/1×0.789 = 1.578 mol

Mass of iron:

Mass = number of moles ×molar mass

Mass = 1.578 mol × 55.84 g/mol

Mass = 88.12 g

4 0

2 years ago

Explain how energy is conserved between this reaction and the and surrounding environment C3H8+4O2->3CO2+4H2O+ heat (-2218.6)

alukav5142 [94]

Answer:

The heat of formation = Heat of formation of the products - Heat of formation of the reactants

= -2323 + 104 = -2219 ≈ -2218.6 kJ/mol.

Explanation:

The law of conservation of energy states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same

The heat of formation of C₃H₈ is 3C + 4 H₂ → C₃H₈ $\Delta H^{\circ}_f$ -104 kJ/mol

The heat of formation of O₂ is O₂ (g) → O₂ (g) $\Delta H^{\circ}_f$ 0 kJ/mol

The heat of formation of H₂O is H₂(g) + 1/2 O₂→ H₂O (g) $\Delta H^{\circ}_f$ -286kJ/mol

The heat of formation of CO₂ is C (s) + O₂ (g) → CO₂ (g) $\Delta H^{\circ}_f$ -393 kJ/mol

Therefore, in the given reaction we have;

C₃H₈ + 4 O₂ → 3 CO₂ + 4 H₂O

The heat of formation = Heat of formation of the products - Heat of formation of the reactants

The heat of formation = 3 × (-393) + 4 × (-286) - (-104) = -2219 ≈ -2218.6 kJ/mol.

5 0

3 years ago

Nitrogen will ____ valence electrons when forming an ionic bond.

natita [175]

Nitrogen should be gaining 3 valence electrons.

6 0

2 years ago