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3 years ago

Is Fe + S a mixture, compound, or element?

Chemistry

1 answer:

melomori [17]3 years ago

8 0

Answer:Mixture

Explanation:Doesn’t specify the proportions of the solution so it can’t be a compound, and iron and sulfur are two separate elements.

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Help this is my test

miss Akunina [59]

Answer:

the answer is v and z. you can see the pic

7 0

3 years ago

Read 2 more answers

The gas law for an ideal gas at absolute temperature T (in kelvins), pressure P (in atmospheres), and volume V (in liters) is PV

allsm [11]

Answer:

The rate of change of the temperature is 0.0365 Kelvin per minute.

Explanation:

Step 1: Given data

ideal gas law: P*V = n*R*T

with P= pressure of the gas ( in atm) = 9.0 atm

with V= volume of the gass (in L) =12L

with n = number of moles = 10 moles

R = gas constant = 0.0821 L*atm* K^−1*mo^−1

T = temperature = TO BE DETERMINED

The volume decreases with a rate of 0.17L/min = dV/dT = -0.17

The pressure increases at a rate of 0.13atm/min = dP/dT

Step 2: The ideal gas law

P * [dV/dT] + V * [dP/dT] = nR * dT/dt

9 atm * (-0.17L/min) + 12L * 0.13atm/min = 10 moles * 0.0821 L*atm* K^−1*mo^−1 *dT/dt

0.03 = 0.821 * dT/dt

dT/dt = 0.03/0.821

dT/dt = 0.0365

Since the gas constant is expressed in Kelvin and not in °C, this means that the rate of chagnge of the temperature is 0.0365 Kelvin per 1 minute.

7 0

3 years ago

Calculate the Density of the substances below to determine if they will float or sink in water.

Reil [10]

Explanation:

If the density of the object is more than that of water, it will sink. Otherwise it will float. The density of water is 1 g/mL.

Substance 1,

Mass, m = 450 g, Volume, V = 90 mL

Density = mass/volume

So,

$d_1=\dfrac{450}{90}\\\\=5\ g/mL$

It will sink.

Substance 2,

Mass, m = 35 g, Volume, V = 70 mL

Density = mass/volume

So,

$d_2=\dfrac{35}{70}\\\\=0.5\ g/mL$

It will float.

Substance 3,

Mass, m = 24 g, Volume, V = 12 mL

Density = mass/volume

So,

$d_3=\dfrac{24}{12}\\\\=2\ g/mL$

It will sink.

7 0

3 years ago

Which of the following is NOT a property of an acid?

MrMuchimi

the correct answer is feels slippery

5 0

3 years ago

Calculate the molarity of a solution containing 5.6 mol of sodium hydroxide dissolved in 2.1 L of water

yKpoI14uk [10]

2.0 MOL is the correct answer I believe

5 0

3 years ago