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frutty [35]
3 years ago
6

Chemical reactions can be detected by changes in____. select all that apply. a)temperature.

Chemistry
1 answer:
Elenna [48]3 years ago
4 0
It would be a, b, and d
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Which is it that causes thunderstorms the stratosphere or the troposphere.
Nastasia [14]

Answer:

Stratosphere

Explanation:

Small storms would be residing in the troposphere but stronger thunderstorms and hurricanes reside in the stratosphere.

5 0
3 years ago
11. 2073 Set D Q.No. 1 Ammonia molecule has got trigonal
Nikolay [14]

Answer:

See explanation

Explanation:

I know that we usually associate the sp3 hybridization to the tetrahedral shape. This is common in molecules such as CH4. So it may sound somewhat strange that NH3 molecule has an sp3 hybridized nitrogen atom and a trigonal pyramidal geometry.

Let us recall that the central nitrogen atom in NH3 has a lone pair of electrons. These lone pairs causes more repulsion than bond pairs. As a result of the presence of this lone pair, the bond angle in the NH3 molecule is distorted away from the expected 109.7 degrees in tetrahedral geometry and the bonding groups are now arranged in a trigonal pyramidal geometry(with bond angle less than 109.7 degrees) to minimize electron pair repulsions.

5 0
3 years ago
Two pipes with 1 meter diameters join to become one pipe with 2 meter diameter. Water was flowing in first pipe at 500 kg/s and
zloy xaker [14]

Answer:

The mass flow rate at the exit of the 2 meter diameter pipe is 1442 kg/s

Explanation:

If the oil is flowing in the 1m diameter pipe at 0.8 m/s, we can calculate the flow as

Q=\bar{v}*A=\bar{v}*(\pi/4*D^{2} )=0.8m/s*0.785m^{2} =0.628m^{3}/s

The mass flow is

M=\rho*Q=1500 kg/m3*0.628m3/s=942kg/s

The mass flow rate at the exit of the 2 meter diameter pipe is

M=M_w+M_o=500 kg/s+942kg/s=1442kg/s

3 0
3 years ago
Why are scientific models important in the study of science?
telo118 [61]

Answer:

In science, amodel is a representation of an idea, an object or even a process or a system that is used to describe and explain phenomena that cannot be experienced directly. Models are central to what scientists do, both in their research as well as when communicating their explanations.

Explanation:

7 0
3 years ago
If an object loses mass, what will happen to its weight?
NeX [460]
Weight will decrease because of the amount of gravitational pull being less
8 0
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