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3 years ago

Urgent plzz help meeee thx I HAVE EXAMEEE

Chemistry

1 answer:

USPshnik [31]3 years ago

6 0

Answer: $2Ag^{+}(aq)+CO_3^{2-}(aq)\rightarrow Ag_2CO_3(s)$

Explanation:

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The given chemical equation is:

$2AgF(aq)+Na_2CO_3(aq)\rightarrow Ag_2CO_3(s)+2NaF(aq)$

The complete ionic equation is;

$2Ag^{+}(aq)+2F^-(aq)+2Na^+(aq)+CO_3^{2-}(aq)\rightarrow Ag_2CO_3(s)+2Na^+(aq)+2F^-(aq)$

The ions which are present on both the sides of the equation are $Na^+$ and $F^-$ and are not involved in net ionic equation.

Hence, the net ionic equation is :

$2Ag^{+}(aq)+CO_3^{2-}(aq)\rightarrow Ag_2CO_3(s)$

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You start with 1 L of CO2 at standard temperature and pressure in a closed container. If you raise the temperature of the gas, t

pychu [463]

Answer:

Increase

Explanation:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

If the initial temperature and pressure is standard,

Pressure = 1 atm

Temperature = 273.15 K

then we increase the temperature to 400.0 K, The pressure will be,

1 atm / 273.15 K = P₂/400.0K

P₂ = 1 atm × 400.0 K / 273.15 K

P₂ = 400.0 atm. K /273.15 K

P₂ = 1.46 atm

Pressure is also increase from 1 atm to 1.46 atm.

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3 years ago

How would you find the atomic number, atomic mass, protons, neutrons and electrons for ions and isotopes? Is it similar?

cricket20 [7]

Atomic number = number of protons

atomic mass = atomic number + number of neutrons

protons = electrons after ion effect

neutrons = atomic mass - atomic number

electrons = number of proton plus charge for -ve ion OR minus for +ve ion

They are different, representing different properties...

7 0

3 years ago

A rectangular block of copper metal weighs 1896 g. The dimensions of the block are 8.4 cm by 5.5 cm by 4.6 cm. From this data, w

Fed [463]

Answer:

Density = 8.92 g/cm³

Explanation:

Density shows the relation of the mass and volume of a determined object. We have this deffinition:

Density = mass / volume

First of all, we calcualte the volume of the block of copper metal, with the data given:

8.4 cm . 5.5 cm . 4.6 cm = 212.52 cm³

Now we replace at the density formula:

Density = 1896 g /212.52 cm³ = 8.92 g/cm³

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3 years ago

If air has a dry-bulb temperature of 2°C

Allisa [31]

Answer:

The relative humidity is 36%.

Explanation:

Relative humidity is the measure of ratio of actual vapor density to saturated vapor density in a given system. So there are different ways to measure the relative humidity in the atmosphere. One of the common ways is to measure using Psychrometer. In this instrument, two different thermometers are used as measuring device. One of the thermometer measures the humidity in dry air and another in wet air. So the difference of the temperature of dry and wet air bulb will be related to determine the relative humidity percentage. The formula to determine the relative humidity using this method is as below.

$Relative humidity=\frac{(e_{w}-[N*(1+0.00115*T_{w}*(T_{d}-T_{w}))])*100}{e_{d} }$

Also,

$e_{d}=6.112*e^{[\frac{(17.502*T_{d} )}{(240.97+T_{d} )}]}$

And,

$e_{w}=6.112*e^{[\frac{(17.502*T_{w} )}{(240.97+T_{w} )}]}$

Here e =2.718, $T_{d}$ and $T_{w}$ are the temperature at dry bulb and wet bulb temperatures, respectively.

So, the relative humidity after substituting the values of Td = 2 C and Tw = -2 C is 36%.

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3 years ago

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seraphim [82]

Answer:

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3 years ago

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