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lyudmila [28]
3 years ago
7

The law of partial pressures was developed by ___________.

Chemistry
1 answer:
fomenos3 years ago
3 0

Answer:

John Dalton

Explanation:

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Which statement best describes a compound formed by an ionic bond?
olga2289 [7]

Answer is D

Explanation:

4 0
4 years ago
Read 2 more answers
How many moles of a gas are contained in 2.085 L at STP?
muminat
Answer /-

A.0.0931 mol

from ideal gas equation ,

We have ,

PV = nRT

Where P stands where pressure of gas.
We know that pressure of gas at STP = 1 atm

V stands for volume of gas , given Volume is 2.085 L

R stands for gas constant , R = 0.0821

And T stands for absolute temperature and measured in kelvin,T=273K

Now ,

PV = nRT

n = PV/RT

Refer attachment for working

4 0
2 years ago
Iron has a density of 7.86 g/cm3 (1 cm3=1 mL). Calculate the volume (in dL) of a piece of iron having a mass of 4.54 kg . Note t
lilavasa [31]
<span>The volume of iron is obtained from the density formula (density= mass/ volume) given the density and mass. In this case, 4,540 grams of iron and a density of 7.86 g/ml are given. The volume obtained from formula is 493.64 ml or 5.78 dL. </span>
8 0
3 years ago
Give the number of significant figures in this number: 7.8 x 10¹²
denis-greek [22]
The number is written in scientific notation.


The significant figures are the numbers known precisely plus 1 digit that is uncertain.


When the numbers are expressed in scientific notation all the digits before  10^n are significant.


So, 7 and 8 are significant figures and the answer is that the number of significant figures is 2.


Answer: 2
8 0
4 years ago
A catalyst is used to increase the reaction rate of a chemical reaction.
hichkok12 [17]
The answer would be C
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3 years ago
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