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3 years ago

9

HELPPPP DOES ANYONE KNOW 34 35 36 37

1 answer:

Salsk061 [2.6K]3 years ago

6 0

Answer:

34- Solid

35-Metals form metallic bonds releasing one or more valence electrons to form a common electron reservoir which contains free mobile elactrons who will conduct electricity well.

36 When the cation is formed electrons are removed and the effective positive neuclear charge increases and it makes the remaining electrons accumulate around the neucleous making the cationic radius smaller than that of the atom

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4. Evaluate the information contained in this calculation and complete the

Neporo4naja [7]

Since you did not give a calculation, I will just give an example. Suppose that you are to burn 5 kg of methane (CH4) from 0 to 10°C. The specific heat capacity of methane is 4.475 kJ/kg-K.

H = mCpT

H = (5kg)( 4.475 kJ/kg-K)(10-0)

H = 223.75 kJ

Because the enthalpy is positive in value, methane takes in heat.

7 0

4 years ago

A mixture of He, Ne, and Ar gases at a particular temperature has partial pressures of 0.75 atm He, 0.30 atm Ne, and 0.62 atm Ar

inessss [21]

Answer:

The order of mole fraction in increasing order will be:

$\chi_{Ne}$

Explanation:

Relation between mole fraction and partial pressure of the component is given as:

$p_i=P\times \chi_i$

Where :P = Total pressure of the mixture

$p_i$ = partial pressure of the i component

$\chi_i$ = Mole fraction of the i component

We have :

Partial pressure of the helium gas , $p_{He}$ = 0.75 atm

Partial pressure of the neon gas, $p_{Ne}$ = 0.30 atm

Partial pressure of the argon gas , $p_{Ar}$ = 0.62 atm

As we can see that from the above equation, that partial pressure and mole fraction are directly linked to each other.

$p_i\propto \chi_i$

So, the gas with higher value of partial; pressure will have higher value of mole fraction in the mixture.

So, the order of partial pressure from lowest to highest is:

$p{Ne}$

And hence the order of mole fraction will also be same :

$\chi_{Ne}$

5 0

4 years ago

Five drops of 1.0M NaOH increase the pH of a solution from 3.0 to 4.6. Five additional drops of 1.0M NaOH increase the pH to 4.7

Andrej [43]

The solution is buffered with a weak acid and it's conjugate base. Since NaOH is a base, you can use a weak acid as it's buffer.

5 0

3 years ago

Which element has the largest atomic radius?<br> As<br> N<br> P<br> Sb

SVEN [57.7K]

The element with the largest radius is Sb

3 0

4 years ago

Read 2 more answers

Radioactive isotope X has a half-life of 500,000 years. This isotope may be found in some types of volcanic rocks. A particular

lianna [129]

Answer: The footprints were made $2.99\times 10^6years$ years long ago.

Explanation:

Radioactive decay follows first order kinetics.

Half-life of isotope X= 500,000 years

$\lambda =\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{500000}=0.00000139year^{-1}$

The equation for first order kinetics is :

$N=N_o\times e^{-\lambda t}$

N = amount left after time t = 0.125 mg

$N_0$ = initial amount = 8.00 mg

$\lambda$ = rate constant

t= time

Putting the values we get:

$0.125=8.00\times e^{- 0.00000139years^{-1}\times t}$

$0.0156=e^{- 0.00000139years^{-1}\times t}$

$t=2.99\times 10^6years$

The footprints were made $2.99\times 10^6years$ years long ago.

4 0

3 years ago