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3 years ago

Hey guys! How is the answer C? I need steps plz

Chemistry

1 answer:

oksian1 [2.3K]3 years ago

5 0

So basically the answer is c bc if your dividing then multiplying you’d boils get your answer

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What mass of methane (CH4) gas occupies a volume of 0,462 L at 1atm and 273K

LiRa [457]

Explanation:

Since methane gas is at 1 atm and 273 K, it is at standard temperature and pressure(STP).

One mole of every gas occupies 22.4 dm^3 at STP, and vice versa. So,

22.4 dm^3 at STP of CH4=1 mol=12+4(1)=16 g

0.462 L(0.462 dm^3) at STP of CH4

=(16 g×0.462 dm^3)/22.4 dm^3

=0.33 g

6 0

3 years ago

The formula for calcium oxide is CaO. What are the formulas for magnesium oxide and strontium oxide?

Hunter-Best [27]

Answer:

Formula of magnesium oxide is MgO and formula of strontium oxide is SrO

Explanation:

Ca, Mg and Sr are same group bivalent metals.

Oxygen is a bivalent element

In general, formula of a compound made of a cation $M^{x+}$ and an anion $A^{y-}$ is $M_{y}A_{x}$ for $x\neq y$

When x = y, formula of the compound becomes MA

As both these metals and oxygen are bivalent therefore formula of magnesium oxide is MgO and formula of strontium oxide is SrO.

8 0

3 years ago

Read 2 more answers

write down the name and molecular formula of the compound which gives hydrogen ion and chloride ion in the solution state.

podryga [215]

Answer:

Hydochloric acid

HCl

Explanation:

The name of the compound that gives hydrogen ion and chloride ions in the solution state is Hydrochloric acid.

Hydrochloric acid is made up of one atom of hydrogen and 1 atom of chlorine. We can also say, it is made up of 1 mole of hydrogen and 1 mole of chlorine.

The formula of this compound is HCl;

In solution:

HCl $_{aq}$ → H⁺ + Cl⁻

8 0

2 years ago

Assume that an oil slick consists of a single layer of molecules and that each molecule occupies a cube 0.488 nm on a side. dete

IgorC [24]

<span>Since the oil slick consists of a single layer, then the thickness of the oil slick is 0.488 nm. When we multiply the thickness of the oil slick by the area A, then we should get the volume of the oil slick 0.708 m^3. We can set up an equation to find the area A. (A)(0.488 nm) = 0.708 m^3 A = 0.708 m^3 / 0.488 nm A = 0.708 m^3 / 0.488 X 10^{-9} m A = (0.708 / 0.488) X 10^9 m^2 A = 1.45 X 10^9 m^2 The area of the oil slick is 1.45 X 10^9 m^2</span>

5 0

3 years ago

2(x+2) -4(2x-3)=4(2x-1)

rodikova [14]

Answer:

x = 10/7

Explanation:

2(x + 2) - 4(2x - 3) = 4(2x - 1),

2x + 4 - 8x + 12 = 8x - 4,

-6x + 16 = 8x - 4,

20 = 14x,

x = 20/14 or 10/7

8 0

2 years ago