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2 years ago

NAME THESE COUMPANDS

Chemistry

1 answer:

alina1380 [7]2 years ago

8 0

Answer:

propane -1 2 3 - trioic acid

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Balance this equation: CH4 +2O2--------> ___ CO2 + ___ H2O

Lubov Fominskaja [6]

Answer:

b-1 CO2+ 2H2O

5 0

3 years ago

Consider the reaction. PCl5(g)↽−−⇀PCl3(g)+Cl2(g) K=0.042 The concentrations of the products at equilibrium are [PCl3]=0.18 M and

tatyana61 [14]

Answer: The equilibrium concentration of $PCl_5$ is 1.285 M.

Explanation:

The chemical equation for the decomposition of phosphorus pentachloride follows:

$PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)$

The expression for equilibrium constant is given as:

$K_c=\frac{[PCl_3][Cl_2]}{[PCl_5]}$

We are given:

$K_c=0.042$

$[PCl_3]=0.18M$

$[Cl_2]=0.30M$

The concentration of solid substances are taken to be 1. Thus, they do not appear in the equilibrium constant expression.

Putting values in above equation, we get:

$0.042=\frac{0.18\times 0.30}{[PCl_5]}$

$[PCl_5]=1.285$

Hence, the equilibrium concentration of $PCl_5$ is 1.285 M.

6 0

2 years ago

How would you prepare a 1 L solution of 3 M MgO?

oksano4ka [1.4K]

Answer: 175.35g

Explanation: A 3 M solution has 3 moles of solute per litre.

The mass of one mole of NaCl equals the MW of NaCl MW = 35.45 + 23 =58.45 g/mol

The mass of 3 moles is 58.45 g/mol ×3 mol=175.35 g NaCl or 200 g rounded to one sigfig.

8 0

3 years ago

The density of titanium metal is 4.51 g/cm3 at 25 ∘C What mass of titanium displaces 68.6 mL of water at 25 ∘C∘C?

goblinko [34]

Answer:

The mass of titanium displaces 68.6 mL of water is 309.4 g.

Explanation:

Given that:-

$\rho=4.51\ g/cm^3$

$V=68.6\ mL$

Also, 1 $cm^3$ = 1 mL

So, $V=68.6\ cm^3$

The expression for the calculation of density is shown below as:-

$\rho=\frac{m}{V}$

Using the above expression to calculate the mass as:-

$m={\rho}\times V$

Applying the values to calculate the mass as:-

$m=4.51\ g/cm^3\times 68.6\ cm^3=309.4\ g$

The mass of titanium displaces 68.6 mL of water is 309.4 g.

5 0

3 years ago

Which of the following statements about the relationship between science and technology is not true

Dafna11 [192]

Because they r the same

8 0

2 years ago