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
e-lub [12.9K]
3 years ago
6

Pumice is a type of rock formed when gas bubbles are trapped inside of cooling lava. Pumice is most often formed when volcanoes

erupt violently. What type of rock is pumice?
A) extrusive igneous
B) intrusive igneous
Eliminate
C) contact metamorphic
D) foliated metamorphic
Chemistry
1 answer:
irinina [24]3 years ago
6 0
I think extrusive igneous
You might be interested in
Urea, CO(NH2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. What is th
Pachacha [2.7K]

Answer:

5.004kg

Explanation:

Combustion of carbon

C+O2=CO2

from the relationship of molar ratio

mass of carbon/molar mass of carbon=volume of CO2 produced\molar vol(22.4 dm3)

mass of carbon =1000kg

atomic mass of carbon =12

volume of CO2 produced=1000×22.4/12

volume of CO2 produced =1866.6dm3

from the combustion reaction equation provided

CO2 (g) + 2NH3 (g) ⟶ CO (NH2 )2 (s) + H2 O(l)

applying the same relationship of molar ratio

no of mole of CO2=no of mole of urea

therefore

vol of CO2\22.4=mass of urea/molar mass of urea

molar mass of urea=60.06g/mol

from the first calculation

vol of CO2=1866.6dm3

mass of urea=1866.6×60.06/22.4

mass of urea=5004.82kg

7 0
3 years ago
Read 2 more answers
What is the potential energy of a rock with a mass of 10 kg while sitting on a cliff that is 15 m high
KonstantinChe [14]
150 hhhhhjjhhjjhhhhhjjjj
7 0
3 years ago
A compound containing Na, C, and O is found to have 1.06 mol Na, 0.528 mol C, and 1.59 mol O. What is the empirical formula of t
Effectus [21]

Given :

Moles of Na : 1.06

Moles of C : 0.528

Moles of O : 1.59

To Find :

The empirical formula of the compound.

Solution :

Dividing moles of each atom with the smallest one i.e 0.528 .

So,

Na : 1.06/0.528 = 2.007 ≈ 2

C : 0.528/0.528 = 1

O : 1.59/0.528 = 3.011 ≈ 3

Rounding all them to nearest integer, we will get the number of each atom in the empirical formula.

So, empirical formula is Na_2CO_3 .

Hence, this is the required solution.

5 0
3 years ago
A 50.6 grams sample of magnesium hydroxide (Mg(OH)2) is reacted with 45.0 grams of hydrochloric acid (HCl). What is the theoreti
boyakko [2]
The answer is C, 58.6
7 0
3 years ago
Read 2 more answers
Roberto and his dad drove from town A to town B taking the long way, ate lunch and then came back using a
alina1380 [7]

Answer:c which is 70

Explanation:

i took the test and got it right

3 0
3 years ago
Read 2 more answers
Other questions:
  • Hector went to the grocery store by heading due north at 3 m/s, then turning east and continuing at
    7·1 answer
  • The nitrogen and hydrogen atoms that make up ammonia are held together by a
    12·1 answer
  • A mineral must be_______ rather than organic. Organic materials are formed from_______ things. Minerals must be made from materi
    9·1 answer
  • Which terms are associated with the Cenozoic era: Homo sapiens, mammoth, dinosaur, grass?
    14·1 answer
  • What atoms are found in the phosphate group?
    6·2 answers
  • At 1.4 atm of pressure a gas has a volume of 111 ML at what pressure will the gas have a volume of 85 ML.
    8·1 answer
  • What percentage of a substance remains after 7 half-lives have passed?
    7·1 answer
  • E
    12·2 answers
  • If 20.0g of water at 56.2℃ absorbs 195 J of heat, what is the final temperature? *
    5·1 answer
  • Which of the following examples is a molecule with a covalent bond? (Use the electronegativity values from the periodic table li
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!