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Black_prince [1.1K]
3 years ago
11

Which statement best describes the nature of science? Science discoveries using the latest technology are the most valuable. Sci

entific theories and laws are based on beliefs and popular opinion. Scientific ideas change over time as new information is discovered. Science is superior to other fields such as art, philosophy, and music.
Chemistry
2 answers:
noname [10]3 years ago
7 0
Scientific ideas change over time as new information is discovered
Nadusha1986 [10]3 years ago
4 0
Scientific ideas change over time as new information is discovered.
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Decide whether each molecule is stable or not. decide whether each molecule would be diamagnetic or paramagnetic. calculate each
astra-53 [7]
Incomplete question?
5 0
3 years ago
A solid was found to be highly soluble in water. Treating separate portions of a solution of this solid with aqueous solutions o
chubhunter [2.5K]

Answer:

c. Li_2CO_3

Explanation:

Hello,

Due to the fact that an odorless gas was released, the chemical reaction between lithium carbonate and a random acid (for instance hydrochloric acid) turns out into:

Li_2CO_3(s)+2HCl(aq)-->2LiCl(aq)+CO_2(g)+H_2O(l)

It is known that carbonic acid is unstable and it quickly decomposes into water and carbon dioxide which is an odorless gas. In spite of the fact that the PbSO_3 releases SO_2 it isn't the solid since that gas is odorous.

Best regards.

3 0
3 years ago
We drop a cube of ice into a glass of water. The mass of the cube of ice is 33.1 g and its initial temperature is −10.2∘C. The m
Nastasia [14]

Answer: The final temperature (T) will be;

16.23°c

Explanation: To find the final temperature of any mixture of substance with an initial temperature use the formula;

M1c(T-T1) + M2c(T-T2)=0

c is the specific heat capacity of the two different substance, but because ice and water are the same, we assume c to be 1

T= final temperature of the mixture

T1= initial temperature of the ice= -10.2°c

T2= initial temperature of the water= 19.7°c

M1= mass of ice= 33.1g

M2= mass of water= 251g

Using the formula above

33.1(T-(-10.2)) + 251(T-19.7)=0

Solving out the bracket

33.1T + 337.62 + 251T - 4944.7 = 0

Collecting like terms to both side of the equation and solving

33.1T + 251T = 4944.7 - 33.62

284.1T = 4607.08

T = 4607.08÷284.1 = 16.23°c

6 0
3 years ago
Which of the following radiations consists of a helium nucleus emitted by some radioactive substances? Alpha radiation Beta radi
erica [24]

Answer: Alpha radiation

Explanation: Alpha decay : When a larger radioactive nuclei decays into smaller nuclei by releasing alpha radiation, the mass number and atomic number is reduced by 4 and 2 units respectively.

_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}Y+_2^4\textrm{He}


Beta decay : When a larger radioactive nuclei decays into smaller nuclei by releasing beta radiation, the atomic number is increased by 1 unit.


_Z^A\textrm{X}\rightarrow _{Z+1}^{A}Y+_{-1}^0e


Gamma decay : When a larger radioactive nuclei decays into smaller nuclei by releasing gamma radiation, the mass number remains same.

_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma

5 0
3 years ago
Which type of bond is formed by two atoms that equally share one pair of electrons? (1 point) ionic covalent metallic un?
GenaCL600 [577]
It's B Covalent.Now I'll add more words since the thing says I need to write at least 20 characters.

 
4 0
3 years ago
Read 2 more answers
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