3 years ago

Velocity may be expressed in which I f the following units?

1 answer:

3 0

velocity is speed and direction so it should be expressed in mph f/s (feet per second) with a direction like North, right, left,

ex) 5mph south

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PLEASE HELP! How does one determine how much of a molecule is produced in a reaction?

kozerog [31]

I believe the answer is C !

7 0

3 years ago

4. A salvage operator recovered coins believed to be gold. A sample weighed 385.000g and has a volume of 20.0mL. Were the coins

aleksley [76]

Answer:

Gold

Explanation:

We are given that

Mass of sample ,m=385 g

Volume ,V=20mL

We have to find the coin is gold or yellow brass.

We know that

Density= $\frac{Mass}{volume}$

Using the formula

$Density=\frac{385}{20}g/mL$

$Density=19.25g/mL$

$Density\approx 19.3g/mL$

Density of coin=19.3g/mL

Density of gold=19.3g/mL

Hence, the coin is gold.

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3 years ago

What is the difference between an imprint and an impression?

liubo4ka [24]

Answer:

As nouns the difference between impression and imprint

is that impression is the indentation or depression made by the pressure of one object on or into another while imprint is an impression; the mark left behind by printing something.

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3 years ago

Matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as...

Lilit [14]

It's called a compound because different elements are held together by a chemical bond.

4 0

3 years ago

Why is it important to control the reaction rate of the chemical process

xxTIMURxx [149]

$Mg+2HCl=MgCl_2+H_{2(g)}$

The reaction creates dihydrogen, hence if it's uncontrolled it could lead to potentially dangerous amounts of gas being released at once.

8 0

3 years ago