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gladu [14]
3 years ago
7

you are studying an element that is a gas at room temperature. Is it most likely a metal, nonmetal, or metalloid?

Chemistry
2 answers:
konstantin123 [22]3 years ago
8 0
Nonmetal, for example, the Noble Gases, or Hydrogen.
Grace [21]3 years ago
3 0
It is 100% Nonmetal, why? Because gas is not metallic (so that crosses out metals and metalloids), and can't conduct, in any way.
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Why must chemical equations be balanced?
Elina [12.6K]

Answer:

to validate the law of conservation of mass as total no. of reactants must be equal to the total no. of products

5 0
3 years ago
If you were asked to convert 25 cg to the unit hg, which of the following would be the first fraction used in the conversion? on
zhannawk [14.2K]
We are asked to convert 25 cg to units of hg.

1 cg = 1 centigram = 10⁻² g
1 hg = 1 hectogram = 10² g

The options given are:

a) 1 hg/ 10² g
b) 10² cg/ 1 hg
c) 10² hg/ 1 cg
d) 10⁻² g/ 1 cg

To convert 25 cg to 1 hg, we could convert the 25 cg to grams first, then grams to hg.

25 cg · 10⁻² g/ 1cg = 0.25 g

Here we have converted our number from cg to grams. We can use another conversion of grams to hg to complete the conversion.

0.25 g · 1 hg/ 10² g = 0.0025 hg

Therefore, the first conversion we used was d) 10⁻² g/ 1 cg.
4 0
3 years ago
__ Cu + ___ HNO₃ → ___ _Cu(NO₃)₂ + ___ NO₂ + ___ H₂O
ivolga24 [154]

Answer:

Cu + 4HNO3 --->   Cu(NO3)2 + 2NO2 + 2H2O.

Explanation:

Balancing:

Cu + 4HNO3 --->   Cu(NO3)2 + 2 NO2 + 2H2O.

3 0
3 years ago
Read 2 more answers
Please please please help please
denpristay [2]
Hydrogen and oxygen! Happy holidays btw
3 0
3 years ago
How do chemical and nuclear reactions differ in(c) Effect on rate of higher reactant concentration?
DochEvi [55]

Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei.

<h3>What affects the rate of nuclear reactions?</h3>

Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.

<h3>What is the main difference between chemical reactions and nuclear reactions?</h3>

Chemical reaction normally occurs outside the nucleus. Nuclear reaction happens only inside the nucleus. When chemical reactions occur elements hold their identity and the nuclei of atoms also remains unchanged. During nuclear reactions, the nuclei of atoms changes completely and new elements are formed.

Learn more about chemical reaction here:

<h3>brainly.com/question/11231920</h3><h3 /><h3>#SPJ4</h3>

7 0
1 year ago
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