Answer:
Mass = 64 g
Explanation:
Given data:
Mass of water produced = 36 g
Mass of oxygen needed = ?
Solution:
Chemical equation:
CH₄ + 2O₂ CO₂ + 2H₂O
Number of moles of water produced:
Number of moles = mass/molar mass
Number of moles = 36 g/ 18 g/mol
Number of moles = 2 mol
Now we will compare the moles of water and oxygen.
H₂O : O₂
2 : 2
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 2 mol × 32 g/mol
Mass = 64 g
Answer:
rust is a substance formed on iron coated when it reacts with water and its miosture.
two general method are--
1.after u make any object of iron wet make it dry fast.
2. coat its surface with paint or apply grease, oil or varnish.
3.also by Rusting of iron can be prevented by galvanization.
Normal forces occur at perpendicular angles to the surface between two objects.
Option B
<h3><u>Explanation:</u></h3>
The unit of force comes from its mathematical equation which says force is equal to the product of mass and acceleration. So, the unit of force becomes kg m/s². And this is the SI unit of force, which is also called newton. So 1 newton = 1 kgm/s².
Action at a distance forces are actually the non contact forces which can even work on a body even when the bodies aren't in contact with each other. The examples include gravitational force, magnetic and electric forces etc. So they don't need a physical contact between the two bodies.
But, normal forces are defined as the force that's acting directly on the axis of two bodies i.e perpendicularly to a surface or the part of a surface the body is resting. So, they have full impact on the touching surface.
At noon, Manny's Café had 12 banana muffins, 10 chocolate muffins, 6 blueberry muffins, and 7 vanilla muffins. What is the probability that the next muffin sold is a vanilla muffin? How likely is this event?
The probability that the next muffin sold is a vanilla muffin is
. It is
that this event occurs.
Answer:
option (D) NaOH is right answer
