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pickupchik [31]
4 years ago
5

Which metal is liquid at room temperature a) lead b) copper c) mercury d) sodium

Chemistry
2 answers:
Ahat [919]4 years ago
5 0

Answer:

 THE ANSWER IS MERCURY

Liula [17]4 years ago
5 0

Answer:

mercury

Explanation:

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Three moles of oxygen gas is stored in a 2.5-liter container at 35°C. What is the pressure of this gas?
nadezda [96]

Answer:

The pressure of the gas is 30.3072 atm.

Explanation:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

  • P= ?
  • V= 2.5 L
  • n= 3 moles
  • R= 0.082 \frac{atm*L}{mol*K}
  • T= 35 C= 308 K (being 0 C= 273 K)

Replacing:

P* 2.5 L= 3 moles* 0.082 \frac{atm*L}{mol*K} *308 K

Solving:

P=\frac{ 3 moles* 0.082 \frac{atm*L}{mol*K} *308 K}{2.5 L}

P= 30.3072 atm

<u><em>The pressure of the gas is 30.3072 atm.</em></u>

4 0
3 years ago
Consider the diagram below.
Murljashka [212]

I think it’s B energy of the reactants

4 0
4 years ago
Read 2 more answers
Please want to know how to calculate molecular mass​
Fudgin [204]

Answer:

You multiply the elements atomic number by the number of atoms in the element in order to find its molecular mass.

Hope this helps!

3 0
3 years ago
Where are electrons found in the atom?
RoseWind [281]

In the electron shell

5 0
3 years ago
A compound is 86% carbon and 14% hydrogen by mass. What is the empirical formula for this compound?
andriy [413]
First, convert grams of the elements to moles. Then you divide by the smallest number of moles to get the lowest whole number ratio.
86g C×1 mol C/12g C = 7.2 mol C/7.2= 1
14 g H×1 mol H/1g H = 14 mol H/7.2= 2
So the empirical formula is C1H2
7 0
3 years ago
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