Explanation:
The given data is as follows.
= ?, 
= 0.85 M
= 185 mL, 
= 35.7 mL
where, is concentration of acid
is the volume of acid
is the concentration of base
is the volume of base
According to the neutralization formula.
= 
Now, substituting the given values into the above formula as follows.
=
= 
= 0.164 M
Thus, we can conclude that concentration of acid is 0.164 M.
Answer:
The Earth rotates on its axis at a constant tilt.
Earths rotation on its axis at a constant tilt provides seasonal changes in the different part of the country. This resulted to the distribution of the heat of the sun from northern hemisphere and to southern hemisphere. Making areas with hot temperature may experience rainy season in a year. This will help production of crops or food supply and water supply available for living organism.
If the Earth's rotation is not tilted, then both the northern hemisphere and southern hemisphere will be covered with thick ice sheet. The equatorial region or near the equatorial region will experience tremendous warm temperature. Making our life on Earth not ideal for living.
Magnetic Field
Earth is protected by the magnetic from the dangerous radiation coming from the heat of the sun.
Water and oxygen
These two elements are essential for living organism in order to survive. The existence of waters proves that Earth temperature is conducive for living.
Answer: speed and velocity, but no acceleration
Explanation:
Velocity 
and acceleration 
are both vector quantities, and as vectors they have magnitude and direction. So, if one of this elements (or both) changes, this quantities also changes.
In the case of velocity, its magnitude is the speed and its direction is to the East.
In the case of acceleration, which is the variation of velocity in time, since is constabt and the direction is the same, the acceleration is zero.
Therefore:
<h3>
An object that is traveling east at a constant rate has <u>
speed and velocity, but no acceleration.</u></h3>
