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3 years ago

What is the density of a 10 kg mass that occupies 5 liters? ( pls need help)

Chemistry

1 answer:

bulgar [2K]3 years ago

7 0

Answer: d=2000 g/L

Explanation:

Density is mass/volume. The units are g/L. Since we are given mass and volume, we can divide them to find density. First, we need to convert kg to g.

$10kg*\frac{1000g}{1kg} =10000 g$

Now that we have grams, we can divide to get density.

$d=\frac{10000g}{5 L}$

d=2000g/L

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The volume of a gas at 2.0 atm is 3.0 L. What is the volume of the gas at 1.5 atm at the same temperature?

Andru [333]

Answer: The final volume of the gas comes out to be 4 L.

Explanation:

To calculate the volume with changing pressure, we use the equation given by Boyle's law.

This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

Mathematically,

$P\propto \frac{1}{V}$ (At constant temperature and number of moles)

The equation given by this law is:

$P_1V_1=P_2V_2$

where,

$P_1\text{ and }V_1$ are initial pressure and volume.

$P_2\text{ and }V_2$ are final pressure and volume.

We are given:

$P_1=2.0atm\\V_1=3L\\P_2=1.5atm\\V_2=?L$

Putting values in above equation, we get:

$2atm\times 3L=1.5atm\times V_2\\\\V_2=4L$

Hence, the final volume of the gas will be 4 L.

4 0

3 years ago

Read 2 more answers

Balance this chemical equation.

Vadim26 [7]

Answer:

Explanation:

Reaction Given

NaHCO₃ (s) + HC₂H₃O₂ (aq) -------> CO₂ (g) + H₂O (l) + NaC₂H₃O₂ (aq)

Balance Equation = ?

Solution:

Balance Chemical Equation:

A balanced chemical equation is that in which the number of the reactant atoms equal to the number of the product atom.

For example if the carbon at the reactant side is 3, the number of carbon must be 3 on the product side.

Check the chemical equation and count the number of atoms at the reactant side and product side.

If the number of atoms of the reactants equal to the number of atoms of products then the reaction is balanced but if not equal then reaction is not balanced

Balancing is an trial and error process to get a balance reaction.

First we count the number of atoms of reactant and product

Number of atoms of Reactant:

Na = 1

O = 5

H = 5

C = 3

Number of atoms of Product:

Na = 1

O = 5

H = 5

C = 3

So this a balance equation as the atoms of the reactant atom equal to the number of the product atoms.

Na atom is 1 on both reactant and product side

Oxygen atoms are 5 on reactant and 5 on product side

hydrogen atoms are 5 on reactant and 5 on product side

Carbon atoms are 3 on reactant and 3 on product side

So all the compounds in the reaction have 1 as its coefficient in the blanks

1 NaHCO₃ (s) + 1 HC₂H₃O₂ (aq) -----> 1 CO₂ (g) + 1 H₂O (l) + 1 NaC₂H₃O₂ (aq)

7 0

3 years ago

In which shell duplet rule is applied, why?

Natasha2012 [34]

Answer:

In first shell duplet rule is applied because first shell contains maximum 2 electrons

Explanation:

5 0

3 years ago

The energy gap between the valence band and the conduction band in the widely-used semiconductor gallium arsenide (GaAs) is Δ =

stira [4]

Answer:

$n_e = 8.139 *10^6$

Explanation:

Given that;

The energy gap between the valence band and the conduction band in the widely-used semiconductor gallium arsenide (GaAs) is Δ = 1.424 eV.

So; that implies that:

$\delta \ E = 1.424 \ eV$

Suppose that we consider a small piece of GaAs with 1020 available electrons, -- This is taking about the numbers of electrons used which is :

$n_i = 10^{20} \ electrons$

Temperature is given as:

$T = 274.15 \ K$

Number of electrons can be calculated by using the formula;

$n_e = n_i*e^-^{\frac{\delta E }{2 K_B*T}}$

$n_e = 10^{20}*e^-^{\frac{1.424}{2*8.617*10^{-5}*274.15}}$

$n_e = 8.139 *10^6$

8 0

2 years ago

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SpyIntel [72]

Answer:

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Explanation:

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8 0

2 years ago