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3 years ago

Balance the chemical equation FeS2+O2——>Fe2O3+SO2

Chemistry

1 answer:

Vikki [24]3 years ago

6 0

Answer:

that is the answer

Explanation:

the atoms in each side of the equation must be equal.

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Salt is poured from a container at 10 cm³ s-¹ and it formed a conical pile whose height at any time is 1/5 the radius of the abo

Romashka-Z-Leto [24]

Answer:

$\displaystyle \frac{dh}{dt} = \frac{1}{10 \pi}$

Explanation:

Volume of a cone:

$\displaystyle V=\frac{1}{3} \pi r^2 h$

We have $\displaystyle \frac{dV}{dt} = \frac{10 \ cm^3}{sec}$ and we want to find $\displaystyle \frac{dh}{dt} \Biggr | _{h\ =\ 6}= \ ?$ when the height is 2 cm.

We can see in our equation for the volume of a cone that we have three variables: V, r, and h.

Since we only have dV/dt and dh/dt, we can rewrite the equation in terms of h only.

We are given that the height of the cone is 1/5 the radius at any given time, 1/5r, so we can write this as r = 5h.

Plug this value for r into the volume formula:

$\displaystyle V =\frac{1}{3} \pi (5h)^2 h$
$\displaystyle V =\frac{1}{3} \pi \ 25h^3$

Differentiate this equation with respect to time t.

$\displaystyle \frac{dV}{dt} =\frac{25}{3} \pi \ 3h^2 \ \frac{dh}{dt}$
$\displaystyle \frac{dV}{dt} =25 \pi h^2 \ \frac{dh}{dt}$

Plug known values into the equation and solve for dh/dt.

$\displaystyle 10 = 25 \pi (2)^2 \ \frac{dh}{dt}$
$\displaystyle 10 = 100 \pi \ \frac{dh}{dt}$

Divide both sides by 100π to solve for dh/dt.

$\displaystyle \frac{10}{100 \pi} = \frac{dh}{dt}$
$\displaystyle \frac{dh}{dt} = \frac{1}{10 \pi}$

The height of the cone is increasing at a rate of 1/10π cm per second.

7 0

3 years ago

Which substance is a mixture? table salt gasoline aluminum carbon dioxide

otez555 [7]

Answer: gasoline

Explanation: Gasoline is a mixture of many different hydrocarbons: alkanes (paraffins), cycloalkanes and alkenes (olefins). Salt and carbon dioxide are chemical compounds, aluminium (Al) is an chemical element.

8 0

3 years ago

Read 2 more answers

How does the strength of a liquid’s intermolecular forces affect its viscosity

igor_vitrenko [27]

Answer:

Viscosity increases with stronger intermolecular forces

Step-by-step explanation:

Viscosity is the resistance of a liquid to flow.

A liquid can flow easily only if the molecules can move past each other with little resistance.

If there are strong intermolecular attractive forces among molecules, it is more difficult for them to move past each other.

For example, the molecules in molasses have strong attractive forces, so it is quite viscous.

8 0

4 years ago

What is the basic form for the names of ionic compounds containing a metal that forms more than one type of ion?

professor190 [17]

Answer:

Metal (appropriate charge on metal) nonmetal-ide

Explanation:

1) Write the name of transition metal as shown on the Periodic Table.

2) Write the name and charge for the non-metal.

Use the total charge on the non-metal (or polyatomic ion) find the charge on the transition metal.

3) After the name for the metal, write its charge as a Roman Numeral in parentheses. Example: Iron (II) chloride.

8 0

3 years ago

How is mass different from volume?

marissa [1.9K]

Answer:

mass is the amount of substance contained in matter while volume is the space occupied by matter

in other words , mass talks about how heavy a body is while volume deals with the space covered by a 3- dimensional body. note : A 2- dimensional body can't occupy volume

3 0

3 years ago