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Furkat [3]
3 years ago
10

A chemical change occurs whenever

Chemistry
1 answer:
Talja [164]3 years ago
8 0

Answer:

C.

Explanation:

A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.

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If you purchased 0.610 μCi of sulfur-35, how many disintegrations per second does the sample undergo when it is brand new?Expres
ASHA 777 [7]

Answer:

the sample undergo 1.67 \times 10^5  disintegrations per second.

Explanation:

Given:

The amount of sulphur purchased is 0.671 μCi

To find:

disintegrations per second = ?

Solution:

Some of the conversions are

1 Ci = 3.8 \times 10^{10} Bq

1 rad = 0.01 Gy

1Gy = 1 j/kg tissue

1 rem = 0.01 Sv

1Sv = 1 j/Kg

Using these conversions,

The decay rate of this sample is calculated as

0.671 \mu C i \times \frac{1 \mu C i}{10^{6}} \mu C i \times \frac{0.671 \times 10^{10}}{1 \mu C i}

= 1.67 \times 10^5 disintegrations per second

7 0
4 years ago
The exponents in the rate law of an elementary step are always equal to the coefficients of each species in the balanced reactio
Naya [18.7K]

Answer:

True

Explanation:

True. Since in an elementary step , the reaction procedes by collision of the atoms of reactants involved and since the rate of collision is proportional to the concentration of each atom that participates in the elementary step , the exponents in the rate law of the elementary step always coincides with the coefficients that correspond to that reaction ( regardless if is unimolecular, bimolecular or trimolecular).

7 0
3 years ago
Which of the following is least likely to dissolve in the polar solvent water?
s2008m [1.1K]
<span>Like dissolves like and unlike repels like. This applies to the polarity of the solutions. Polar dissolves polar and non-polar does not mix with polar solutions. In this case, the polar substance that can mix with water. Sugar and salt can be dissolved through agitation. Oil which is nonpolar is immiscible in water. Hence answer is D. </span>
6 0
3 years ago
with the help of balanced chemical equation explain what happens when zinc is put in dilute hydrochloric acid
blagie [28]
They react to form salt  ZnCl + hydrogen gas

3 0
3 years ago
Each nucleus of a cell contains:
Jobisdone [24]

Hi there!

<u>Answer</u>:

Genes and chromosomes

Explanation:

All cells contain Genetic information (or Dna) which is organised into structures called chromosomes.

Chlorophyll are basically green pigments in Chloroplasts and both are <u>only</u><u> </u><u> </u><u> </u><u> </u>found in plant cells and not all cells

5 0
3 years ago
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