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4 years ago

Can someone help me!

Chemistry

2 answers:

Art [367]4 years ago

5 0

Answer:

Explanation:

anzhelika [568]4 years ago

5 0

Answer:

A: joules are the si units for specific heat capacity

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who else has parents that don't want them and mentally abuses them? It's ok I got them to they act all innocent in public but wh

Ulleksa [173]

Answer: oh my gosh, yes I relate with this so much. Don’t worry, you are not alone and you will get through this.

Explanation:

8 0

3 years ago

Read 2 more answers

Se combustionan 2 g de magnesio en Aire, obteniéndose 3,28 g de óxido de magnesio (MgO)¿Qué masa de oxígeno se consumen en la re

konstantin123 [22]

Answer:

1.30 g

Explanation:

La reacción que toma lugar es:

2Mg + O₂ → 2MgO

Primero convertimos 3.28 g de MgO en moles, usando su masa molar:

3.28 g ÷ 40.3 g/mol = 0.081 mol MgO

Después convertimos 0.081 moles de MgO en moles de O₂, usando los coeficientes estequiométricos:

0.081 mol MgO * $\frac{1molO_2}{2molMgO}$ = 0.0407 mol O₂

Finalmente convertimos 0.0407 moles de O₂ en gramos:

0.0407 mol O₂ * 32 g/mol = 1.30 g

5 0

3 years ago

A 10.0 mL sample of 0.75 M CH3CH2COOH(aq) is titrated with 0.30 M NaOH(aq) (adding NaOH to CH3CH2COOH). Determine which region o

Llana [10]

Answer:

5.75

Explanation:

Weak acid and strong base,

Make it a two part problem

The first will be Partial neutralization of the weak acid, while the second is the equilibrium and final pH

1.Parameters

HC2H3O2 =10mL x 0.75M = 7.5 mmol

NaOH =22mL x 0.30M = 6.6 mmol

R HC2H3O2 + OH- --> C2H3O2- + H2O

I 7.5 mmol 6.6 mmol 0 mmol ignore

C -6.6 mmol -6.6 mmol +6.6 mmol

E 0.9 mmol 0.0 mmol 6.6 mmol

2.) HC2H3O2 --> H+ + C2H3O2-

Initial concentrations

[HC2H3O2]: 0.9 mmol / 32mL = 0.0281M

[H+]:

[C2H3O2-]: 6.6 mmol x 32mL = 0.206M

Concentrations at equilibrium

[HC2H3O2]: 0.0281M - x

[H+]: [C2H3O2-]: 0.206M + x

If x is small and can be ignored except [H+]

Substitute and solve

1.3 x 10-5 = (x)(0.206)

(0.0281)

X= 1.77 x 10-6M => pH = 5.75

3 0

3 years ago

Determine how many formula units are in 2.35 moles of lithium phosphite?

Stells [14]

Answer:

Determine how many formula units are in 2.35 moles of lithium phosphite?

Explanation:

After reading the sources provided write a 250 word summary on the contributions of West Virginians to the war effort.What are the dimensions of the product? 2 6 4 1 -3 0 x -3 -2 -8 2 3 5 1 x 2 2 x 2 3 x 2 3 x 3Can somebody help me with this pleaseDetermine how many formula units are in 2.35 moles of lithium phosphite?Can someone help? It's due todayWhat main idea links all three of the article excerpts contained in th passage together? A) Taxation rates should be applied equally and fairly to all people. B A little bit of kindness goes a long way in trying to change the world. C) No one deserves to be lonely, and everyone deserves to be loved. D African-Americans had to fight long and hard to receive equal rights in America.Can somebody help me with this pleaseCan somebody help me with this pleaseAfter reading the sources provided write a 250 word summary on the contributions of West Virginians to the war effort.

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3 years ago

PLEASE HELP PLEASE ASAP

LUCKY_DIMON [66]

air pollution would cause trees to die and animals to die . It would coaus most harm by killing everything on land and in the sea beacuse the animals that die might wash away in the ocean killing other animals slowly but surely. and it doesnt help there is soil erosion sooner rather that later it will turn into nothing.

Explanation:

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3 years ago