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3 years ago

The mass of an object is described in what??

1 answer:

6 0

The mass of an object is measured in either grams or kilograms. Mass is best described as the amount of matter, or "stuff," in a solid, and is different from weight (which is the force of gravity on an object). Since mass is used with solids, it will be measured in grams or kilograms (rather than in something like liters, which would be used with the volume of a liquid). To measure mass, you can use a balance, for example a triple balance beam.

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Radioactive manganese-52 decays with a half-life of 5.6 days. A chemist obtains a fresh sample of manganese-52 and measures its

LUCKY_DIMON [66]

Answer: 11.2 days

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.

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

$k=\frac{0.693}{5.6days}=0.124days^{-1}$

b) for completion of 75% of reaction

$t=\frac{2.303}{0.124}\log\frac{100}{100-75}$

$t=\frac{2.303}{0.124}\log\frac{100}{25}$

$t=11.2days$

The time for which she has to perform the experiment is 11.2 days

5 0

3 years ago

If you wanted to buy an aquarium with only benthos in it which of the following would you buy

Tju [1.3M]

Answer:

$"Organisms$ $in$ $this$ $tank$ $are$ $attached$ $to$ $the$ $bottom,$ $but$ $use$ $the$ $sun$ $to$ $make$ $food."$

Explanation:

"The principal food sources for the benthos are plankton and organic debris from land. In shallow water, larger algae are important, and, where light reaches the bottom, benthic photosynthesizing diatoms are also a significant food source."

6 0

3 years ago

elements combine in three general ways. in blank compounds, electrons are transferred from one element to the other, whereas in

hichkok12 [17]

Elements combine in three general ways. In ionic compounds, electrons are transferred from one element to the other, whereas in covalent compounds, electrons are shared between atoms. Third, in metallic bonding, electrons are shared between a large number of atoms in an electron sea.

Ionic compounds are compounds in which a free electron is transferred to another atom and a bond is formed. Ionic bonds occur in metal ions.

In liquid compounds, covalent bonds are formed. In covalent bonds, electrons are shared with each other,

The third type of bond is the metallic bond. In this type of bond, atoms are packed tightly and a free electron pool travels in between them.

To learn more ionic bonds, click here:

brainly.com/question/13526463

#SPJ4

6 0

1 year ago

The atomic mass of boron is 10.811. What is the mass number of the most

Sati [7]

Answer:

C.11

Explanation:

Boron-11 makes up around 80% of all natural Boron. And, typically, the quickest way to determine the most abundant isotope of an element is to just round the atomic mass to the nearest whole number.

7 0

3 years ago

Can someone please help me by answering this question??

NeX [460]

Answer: 12N IT IS JUST MATH

8 0

3 years ago