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4 years ago

Dr. Maxwell performed several experiments which seem to indicate that eating chocolate is always bad for your health. How should

Chemistry

2 answers:

Troyanec [42]4 years ago

7 0

Answer:

Explanation:

svetoff [14.1K]4 years ago

3 0

D. They should try to reproduce Dr. Maxwell's research to verify his results

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Can someone please help me:( please dont scroll <br><br> create 2 quantitative observations

shusha [124]

Answer:

a quantitative observation implies that the subject can be measured by quantity, aka amount or in numbers.

Ex 1: adding one gram of salt to one gram of sugar makes two grams of seasoning. in this example, there are individual quantities (1 gram of each) and total quantity (2 grams). this only changes if the substances have a chemical reaction, such as one of them destroying the other, then the weight would change.

Ex 2: a more simple example is the weight of something. putting the substance on a scale (one specifically for whatever you are measuring, whether it be liquid or solid) is the best way to determine its quantity.

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2 years ago

2.4 moles of a gas in a balloon has a pressure of 4.0 atm at 373K. What is the volume of the gas?

leva [86]

Answer:

To find the volume of the gas. So if you have the amount of gas in moles. So the first step is to multiply the amount of moles that is 2.4 with liters to find the answer.

Explanation:

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3 years ago

Which force saves the atom by emitting particles from the nucleus?

vovangra [49]

Answer:

nuclear force

I hope this helps :)

Explanation:

6 0

3 years ago

Read 2 more answers

A sample of matter was given the following description: The sample of the pure substance is blue in color with an octahedral sha

Alexeev081 [22]

Answer:

A crystalline solid

Explanation:

Most solids form with a regular arrangement of their particles because the overall attractive interactions between particles are maximized, and the total intermolecular energy is minimized, when the particles pack in the most efficient manner. The regular arrangement at an atomic level is often reflected at a macroscopic level. Liquids dont use to have this kind of arrangements or shapes.

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3 years ago

Three isotopes of oxygen are oxygen-16 oxygen-17 and oxygen-18. Write the symbol for each, including the atomic number and mass

Karo-lina-s [1.5K]

The symbol of an isotope is:
$^A _Z X$
A - the mass number
Z - the atomic number
X - the symbol of an element

The symbol of oxygen is O.

The atomic number is the same for all isotopes of one element. For oxygen it's 8, because every atom of oxygen has 8 protons in its nucleus.

The mass number is the number of nucleons (protons + neutrons) in the nucleus of an atom, and it's given in the name of an isotope. Oxygen-16 has the mass number 16, oxygen-17 has the mass number 17, oxygen-18 has the mass number 18.

Oxygen-16: $^{16} _8 O$

Oxygen-17: $^{17} _8 O$

Oxygen-18: $^{18} _8 O$

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3 years ago