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2 years ago

Decide which element probably has a boiling point most and least similar to the boiling point of potassium.

Chemistry

1 answer:

larisa86 [58]2 years ago

4 0

Explanation:

The boiling point of Potassium is most similar to the element sodium , since , both the elements belong to the same group i.e. , the group one , Hence , the most of the physical chemical properties are same , irrespective of some exceptions .

Hence , the Boiling point of Potassium and sodium are the same .

The boiling point of Potassium is least similar to the element helium , since , both the elements belong to different groups , Since , Helium has a negative boiling point and is one of the most stable element , being a noble gas .

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An object's velocity can be described by its acceleration and direction. True False

coldgirl [10]

Answer:

False

Explanation:

An object's velocity can be described by it's direction. Because velocity is a vector. Besides velocity and acceleration are different units they can't be described by each other.

7 0

2 years ago

I need someone to answer these.

SCORPION-xisa [38]

Answer:

The identity of an atom is determined my the number of protons. This is the atomic number.

The particle(s) found inside the nucleus are called protons and neutrons. Their combined mass is referred to as the mass number.

Isotopes have the same number of protons, but different number of neutrons.

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3 years ago

Does Monocercomonoides still meet the definition of a eukaryote? Why or why not?

KengaRu [80]

Answer:

Yes

Explanation:

They are a unique type of eukaryote because they lack an important organelle: mitochondria. Mitochondria are essential for producing cellular energy in most eukaryotic cells. However, due to its habitat, it is able to acquire energy from a process called sulfur mobilization.

They are significant because they challenge the idea that eukaryotes need mitochondria to be classified as eukaryotic. However, they have other membrane-bound organelles such as a nucleus and Golgi apparatus, meaning they remain eukaryotic.

Research suggest they lost their mitochondria over time, rather than never having had them throughout their ancestry.

Because of all these reasons, they still meet the definition of a eukaryote.

6 0

3 years ago

A vehicle goes from 5 m/s to 50 m/s in seconds. What is it’s acceleration?

VLD [36.1K]

Answer:

the acceleration i think is 10

Explanation:

5x10=50

7 0

3 years ago

) How many moles are there in 2.00 x 10^19 molecules of calcium phosphate?

Tamiku [17]

Answer:

$\huge 3.322 \times {10}^{ - 5} \: \: moles \\$

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{2.00 \times {10}^{19} }{6.02 \times {10}^{23} } \\ \\ = 3.322 \times {10}^{ - 5} \: \: moles$

Hope this helps you

4 0

2 years ago