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alexandr402 [8]
3 years ago
10

Which group is in the leftmost column on the periodic table?

Chemistry
1 answer:
Gelneren [198K]3 years ago
8 0
Answer: alkali metals
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How can a chemical reaction be sped up?Select from the drop-down menu to correctly complete the statement.
lara31 [8.8K]

Answer: Catalyst

Explanation: it speeds it up lol but basically the catalyst helps speed up the chemical reaction by reducing the activation energy or changing the reaction machenism/

8 0
3 years ago
Determine the number of moles of air present in 1.35 L at 760 torr and 17.0 C. Which equation should you use?
Vanyuwa [196]

C. N = PV/RT is the anwser to your question

4 0
3 years ago
Read 2 more answers
What volume is occupied by 3.760 g of oxygen gas at a pressure of 88.4
Lorico [155]

Answer:

3.2 L

Explanation:

Given data:

Mass of oxygen = 3.760 g

Pressure of gas = 88.4 Kpa (88.4×1000 = 88400 Nm⁻²)

Temperature = 19°C (19+273.15 = 292.15 K)

R = 8.314 Nm K⁻¹ mol⁻¹

Volume occupied = ?

Solution:

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 3.760 g/ 32 g/mol

Number of moles = 0.12 mol

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant

T = temperature in kelvin

V = nRT/P

V = 0.12 mol ×  8.314 Nm K⁻¹ mol⁻¹ × 292.15 K /88400 Nm⁻²

V = 291.472 Nm /88400 Nm⁻²

V = 0.0032 m³

m³ to L:

V = 0.0032×1000 = 3.2 L

4 0
3 years ago
What types of intermolecular forces are collectively named van der waals forces after johannes van der waals, who developed the
gladu [14]
Dispersion forces or London dispersion forces are collectively referred to as Van der Waals forces. These forces are temporary and arise from the relative position of electrons in one atom to another. If the electrons become distributed in an asymmetrical manner, the negative charge is concentrated at one end of the particle and a positive charge is concentrated at the other. These forces are also called induced dipole-induced dipole attraction.
6 0
3 years ago
When a hydrocarbon fuel is burned, almost all of the carbon in the fuel burns completely to form CO2 (carbon dioxide), which is
Monica [59]

Answer:

1.239 * 10^8 Kg

Explanation:

Since all the electricity consumed comes from natural gas;

amount of electricity consumed = 700 * 300,000 = 2.1 * 10^8 kWh

So, amount of CO2 consumed is given by;

amount of electricity consumed * amount of CO2 per kWh

Hence,

Amount of CO2 = 2.1 * 10^8 kWh * 0.59 = 1.239 * 10^8 Kg

8 0
3 years ago
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