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kifflom [539]
3 years ago
6

Which of the following is the balanced equation for the

Chemistry
1 answer:
NNADVOKAT [17]3 years ago
6 0
A.) is the answer =)
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Cuantos gramos de nitrato de potasio (KNO3) son necesarias para preparar 800ml de solucion al 12 % m/v
maxonik [38]

Answer:

96 g

Explanation:

Tomando en cuenta que estamos hablando de una solución de Nitrato de potasio cuya concentración es 12% m/V, debemos entonces usar la expresión de %m/V:

%m/V = msto / Vsol * 100   (1)

De esta expresión, debemos despejar la masa de soluto (msto) que es precisamente el valor que estamos buscando. Al hacer el despeje tenemos:

msto = %m/V * Vsol / 100    (2)

Ahora solo nos queda sustituir los valores dados y resolver:

msto = 12 * 800 / 100

<h2>msto = 96 g de KNO₃</h2>

Espero te sirva.

3 0
3 years ago
Q3. A student added water to calcium oxide to make calcium hydroxide
galina1969 [7]

26.4 kg of calcium hydroxide (Ca(OH)₂)

Explanation:

We have the following chemical reaction:

CaO + H₂O → Ca(OH)₂

molecular weight of Ca(OH)₂ = atomic mass of Ca × number of Ca atoms + atomic mass of O × number of O atoms + atomic mass of H × number of H atoms

molecular weight of Ca(OH)₂ = 40 × 1 + 16 × 2 + 1 × 2 = 74 g/mole

molecular weight of CaO = atomic mass of Ca × number of Ca atoms + atomic mass of O × number of O atoms

molecular weight of CaO = 40 + 16 = 56 g/mole

number of moles = mass / molecular weight

number of moles of CaO = 20 / 56 = 0.357 kmoles

Taking in account the chemical reaction we devise the following reasoning:

if        1 kmole of CaO produces 1 kmole of Ca(OH)₂

then   0.357  kmoles of CaO produces X kmoles of Ca(OH)₂

X = (0.357 × 1) / 1 = 0.357 kmoles of Ca(OH)₂

mass = number of moles × molecular weight

mass of Ca(OH)₂ = 0.357 × 74 = 26.4 kg

Learn more about:

number of moles

brainly.com/question/10165629

brainly.com/question/9081560

#learnwithBrainly

6 0
3 years ago
What is the reflected ray
nasty-shy [4]

Answer:

An incident ray is a ray of light that strikes a surface.

8 0
3 years ago
A measure of kinetic energy of particle motion within a substance is_____.
ratelena [41]

Answer: Option (c) is the kinetic energy.

Explanation:

The kinetic energy present within the particles of a substance is known as thermal energy. Measure of average kinetic energy of particles of a substance is known as temperature.

Whereas heat defined as the transfer of thermal energy from a hot object to a cold object.

Enthalpy is defined as the heat gained or lost by a substance in a chemical reaction.

Thermodynamics is the study of relation between heat and work with chemical or physical changes.

Thus, we can conclude that a measure of kinetic energy of particle motion within a substance is temperature.

4 0
3 years ago
Read 2 more answers
Someone pls answer these questions ASAP thank you:)
babunello [35]

Answer: I kin tommyinnit

Red foxes is the top one

White spruces and willows are the producers

the bottom one is Lynx and hawk.

8 0
3 years ago
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