1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stella [2.4K]
3 years ago
8

What is the density of an unknown object that has a volume of 4cm. and a mass of 10g.

Chemistry
1 answer:
Dmitry [639]3 years ago
5 0
The density would be 2.5g/cm^3
You might be interested in
Someone plz help i need to do this assignment to pass the class
Natalija [7]

Answer:

1)0.2

2)0.72

3)0.01

Explanation:

Formula is 1)454÷2270

2)0.6×1.2

3)8÷800

8 0
2 years ago
A 3.0 g sample of a gas occupies a volume of 1.00L at 100C and 740 torr pressure. The molecular weight of the
SOVA2 [1]

Answer:

94.2 g/mol

Explanation:

Ideal Gases Law can useful to solve this

P . V = n . R . T

We need to make some conversions

740 Torr . 1 atm/ 760 Torr = 0.974 atm

100°C + 273 = 373K

Let's replace the values

0.974 atm . 1 L = n . 0.082 L.atm/ mol.K . 373K

n will determine the number of moles

(0.974 atm . 1 L) / (0.082 L.atm/ mol.K . 373K)

n = 0.032 moles

This amount is the weigh for 3 g of gas. How many grams does 1 mol weighs?

Molecular weight → g/mol → 3 g/0.032 moles = 94.2 g/mol

3 0
3 years ago
Can someone help me please
lesantik [10]
It is an endothermic reaction because the products hAve more heat than the reactions so it was a gain of heat which makes the enthalpy Change positive !
4 0
3 years ago
If you have 85g of sulfur dioxide at STP, how many moles do you have?
Step2247 [10]

Answer: 1.32

Explanation:

Given

85 gm of sulfur dioxide is present at STP

The molar mass of sulfur dioxide is 32+2\times 16=64\ g/mol

The number of moles of sulfur dioxide is

\Rightarrow n=\dfrac{85}{64}\\\\\Rightarrow n=1.32\ \text{mol}

3 0
3 years ago
Please use the below balanced equation to answer this question.    2H2(g)  +  O2(g)  ->   2H2O(l) How many grams of water wil
Blizzard [7]
At STP (standard temperature and pressure conditions), 1 mol of any gas occupies 22.4 L 
This rule is applied to O₂
22.4 L volume occupied by 1 mol
Therefore 83.4 L occupied by - 1/ 22.4 x 83.4 = 3.72 mol
stoichiometry of O₂ to H₂O is 1:2
then the number of moles of water produced - 3.72 mol x 2= 7.44 mol
mass of water produced - 7.44 mol x 18.01 g/mol = 134.1 g
correct answer is D

4 0
3 years ago
Other questions:
  • 2. What is critical mass?
    15·1 answer
  • What motivated arrhenius to calculate how changes in carbon dioxide might affect the climate?
    8·1 answer
  • how many moles of carbon monoxide can be produced from 8 moles of carbon if carbon is the limiting reagent?
    12·1 answer
  • Define ductile.........?​
    8·2 answers
  • Where are most organisms that live in the ocean found ? why ?
    5·1 answer
  • Mr. Thorton, the science teacher, was explaining the difference between kinetic and potential energy. He compared the difference
    5·2 answers
  • How many moles of C6H12O2 are needed to get 12 moles of CO2
    12·1 answer
  • Draw the structures of the starting materials needed to make 2-methylhept-3-yne in the spaces provided. The starting materials m
    14·1 answer
  • Distinguish between a carbohydrate and a protein
    12·1 answer
  • The diagrams show the arrangements of carbon atoms in diamond and in graphite. Compare a use of diamond with a use of graphite,
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!