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fgiga [73]
3 years ago
5

Time zones were adopted to fix what problem

Chemistry
2 answers:
morpeh [17]3 years ago
8 0

Time Zones were adopted to fix the time. Without the time zone, you will never know what time it is

SCORPION-xisa [38]3 years ago
5 0

To know when the sun goes up and down

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Determine the ratio of moles of iron actually used to moles of new product actually formed. Does this molar ratio agree with the
KATRIN_1 [288]

The mole ratio of iron to copper is 1 : 1, thus, 1.31 g of iron is required to produce 1.5 g of copper.

<h3>What is the equation of the reaction between iron and copper(ii) sulfate?</h3>

The reaction between iron and copper(ii) sulfate is a redox displacement reactions in which copper is displaced from its salt by iron.

The equation of the reaction is given below:

CuSO_4 + Fe \rightarrow FeSO_4 + Cu

The mole ratio of both reactants and product is 1 : 1

  • moles = mass/molar mass

molar mass of copper sulfate = 160 g

molar mass of Cu = 64

molar mass of iron = 56 g

  • mole ratio of iron to copper = 1 : 1

moles of Cu in 1.5 g = 1.5/64 = 0.00234

mass of iron required = 0.00234 × 56 = 1.31 g of iron

Therefore, from the mole ratio of iron to copper, 1.31 g of iron is required to produce 1.5 g of copper.

Learn more about mole ratio at: brainly.com/question/19099163

8 0
2 years ago
Is SiCl4 ionic or covalent?​
Fittoniya [83]
Ionic because you have a positive metal and a negative metal
5 0
3 years ago
Determine the frequency of light with a wavelength of 4.257x10^-7cm
TEA [102]

Answer:

frequency of light is 70.47\times 10^{15} \ per\ second

Explanation:

Given

wavelength of light = 4.257\times 10^{-7}\ cm = 4.257\times 10^{-7} \times 10^{-2} \ m= 4.257\times 10^{-9}\ m

Speed of Light = 3\times 10^8 \ m/s

∴ Frequency of Light = \frac{\textrm{Speed of Light}}{\textrm{wavelength}}=\frac{3\times 10^8}{4.257\times 10^{-9}}= 70.47\times 10^{15} \ per\ second

7 0
3 years ago
Un recipiente cerrado, de 4,25 L, con tapa móvil, contiene H2S(g) a 740 Torr y 50,0°C. Se introduce en ese recipiente N2(g) a te
yulyashka [42]

Answer:

n_{N_2}=6.41mol

Explanation:

¡Hola!

En este caso, teniendo en cuenta la información dada por el problema, inferimos que primero se debe usar la ecuación del gas ideal con el fin de calcular las moles de gas que se encuentran al inicio del experimento:

PV=nRT\\\\n=\frac{RT}{PV} \\\\n=\frac{0.08206\frac{atm*L}{mol*K}*(50.0+273.15)K}{740/760atm*4.25L}\\\\n=6.41mol

Seguidamente, usamos la ley de Avogadro para calcular las moles finales, teniendo el cuenta que el volumen final es el doble del inicial (8.50 L):

n_2=\frac{6.41mol*8.50L}{4.25L}\\\\n_2=12.82mol

Quiere decir que las moles de N2(g) que se agregaron son:

n_{N_2}=12.81mol-6.41mol\\\\n_{N_2}=6.41mol

¡Saludos!

8 0
3 years ago
Find 4 items around you OR online if you like. They can be something as simple as table salt or a plastic fork, or as complex as
defon
Bebé, no lo sé, ¡pero buena suerte con la escuela! P
8 0
3 years ago
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