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saw5 [17]
3 years ago
8

Help please asap will mark brainliest!! My time is running out.

Chemistry
2 answers:
Veronika [31]3 years ago
5 0

Answer:

its 16.7 L plz give brainliet

sukhopar [10]3 years ago
4 0

Answer:

I dont know sorry.

Explanation:

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What is the difference between a transition metal and an f-element?
gtnhenbr [62]

Answer:  The transition elements are in the d-block, and in the d-orbital have valence electrons. They can form several states of oxidation and contain different ions. Inner transition elements are in the f-block, and in the f-orbital have valence electrons.

Explanation:

6 0
3 years ago
Studies reveal that during colder glacial periods, co2 levels ____ during warmer interglacial periods.
katovenus [111]
Studies reveal that during colder glacial periods, carbon dioxide levels were lower than during warmer interglacial periods. Glacial periods are intervals of time within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. 
8 0
3 years ago
Sydney was organizing a box of resistors by resistance range. She knows that there are several factors that go into determining
kati45 [8]

The resistance of the wire is dependent on temperature, diameter and nature of the material.

<h3>What is resistance?</h3>

The term resistance refers to the opposition offered to the flow of current in a circuit. The resistance is obtained form Ohm's law which states that;

V = IR

Where;

V = voltage

I = current

R = resistance

Hence, the resistance is dependent on;

  • temperature
  • diameter
  • material

Learn more about resistance: brainly.com/question/15067823

7 0
2 years ago
Which of the following has the highest ionization energy? Rubidium Zirconium Niobium
____ [38]

Niobium has Highest ionization energy.

<u>Explanation:</u>

The next ionization energy removes an electron from the same electron shell, which increases "ionization energy" due to "increased net charge"of the ion from which the electron is being removed.

Let's compare each of the metals first ionization energies,

Rubidium has its first ionization energy as 403 kJ / mol.

Zirconium has its first ionization energy as 660 KJ / mol.

Niobium has its first ionization energy as 664 KJ / mol.

From the given data above, we can infer that Rubidium has the least Ionization energy whereas Niobium has the highest Ionization energy. We can give the increasing order of the given elements as follows-  

Rubidium < Zirconium < Niobium

8 0
3 years ago
The standard molar enthalpy of formation of NH3(g) is -45.9 kJ/mol. What is the enthalpy change if 9.51 g N2(g) and 1.96 g H2(g)
Vladimir [108]

Answer:

\Delta H=-29.7kJ

Explanation:

Hello!

In this case, since the undergoing chemical reaction is:

N_2+3H_2\rightarrow 2NH_3

We first need to identify the limiting reactant given the masses of nitrogen and hydrogen:

n_{NH_3}^{by\ H_2}=1.96gH_2*\frac{1molH_2}{2.02gH_2}*\frac{2molNH_3}{3molH_2}=0.647molNH_3\\\\  n_{NH_3}^{by\ N_2}=9.51gN_2*\frac{1molN_2}{28.02gN_2}*\frac{2molNH_3}{1molN_2}=0.679molNH_3

It means that only 0.647 moles of ammonia are yielded, so the resulting enthalpy change is:

\Delta H=0.647molNH_3*\frac{-45.9kJ}{1molNH_3}\\\\ \Delta H=-29.7kJ

Best regards!

3 0
3 years ago
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