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zhuklara [117]
3 years ago
5

There is a boy i like. i don't think he like me what do i do

Chemistry
1 answer:
SCORPION-xisa [38]3 years ago
7 0

Answer:

tell em

Explanation:

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How do ionic compounds and molecular compounds behave<br> differently in solution?
Lelu [443]

Answer : Molecular compounds dissolve in water by means of dipole-dipole attractions and hydrogen bond attractions. These attractions between the molecular compound and water don't form ions when a molecular compound dissolves.

Explanation: I hoped that helped,

6 0
3 years ago
Radioactive gold-198 is used in the diagnosis of liver problems. The half-life of this isotope is 2.7 days. If you begin with a
monitta

Answer: 6.1 mg

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{2.7days}=0.26days^{-1}

b) sample remains after 1.4 days

1.4=\frac{2.303}{0.26}\log\frac{8.6}{a-x}

0.16=\log\frac{8.6}{a-x}

\frac{8.6}{a-x}=1.4

(a-x)=6.1mg

The sample remains after 1.4 days is 6.1 mg

6 0
4 years ago
PLEASE ANSWER!! I NEED HELP :)
zzz [600]

Answer:

This process is known as doping. It can be done by adding either of two types of impurity to the crystal. (A) By adding electron rich impurities i.e., group 15 elements to the silicon and germanium of group 14 elements.

8 0
3 years ago
State how many mole ratios can be written for a chemical reaction involving three substances?
valentina_108 [34]
Three mole ratios can be written for a chemical reaction involving three substances 
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