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anyanavicka [17]
4 years ago
11

Which is the correct electron dot diagram for krypton (Kr)?

Chemistry
1 answer:
SCORPION-xisa [38]4 years ago
4 0
Krypton is in group 18, and so it has 8 valence electrons. B is the answer
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Which list contains only animal phyla? mosses, annelids, conifers, chordates mosses, ferns, conifers, flowering plants cnidarian
vivado [14]

Answer:

cnidarians, mollusks, annelids, arthropods,

Explanation:

Living organisms have been grouped using a system of classification that runs from Kingdom to Species. One of those kingdoms is KINGDOM ANIMALIA, which consists of animal species i.e. organisms that are strictly heterotrophic and eukaryotic.

The next taxa after kingdom is PHYLA. According to this question, the phyla which consists of only animals are cnidarians, mollusks, annelids, arthropods. Other options contain ferns, mosses, and flowering plants which belong to Kingdom Plantae.

4 0
3 years ago
Read 2 more answers
If a plane travels at a speed of 600 km/h, how long<br> would it take to travel a distance of 300 km
iogann1982 [59]

Answer:

30 minutes

Explanation:

If the plane is going 600 km/h

divide the length and time and it would be half of that, so 300 km would take 30 mins.

4 0
4 years ago
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Two substances A and B react with each other in such a way that one-half of A remains after 25 min and one-fourth of A remains a
juin [17]

Answer:

a. first-order in both A and B.

Explanation:

In order to determine the kinetics of reaction let us consider the given data

a) Doubling the concentration of B while keeping the concentration of A fixed doubles the rate of the reaction. : it means the reaction is first order reaction with respect to reactant B.

b) The half life is the time required to complete the reaction by half way.

As with time one half of A remains and after equal time one fourth of A remains it means again the order of reaction is first with respect to A also.

There is no effect on the half life if we are decreasing the initial concentration of A also.

3 0
4 years ago
at constant atmospheric pressure, the temperature of a gas that occupies the volume of 5.30 L is 298 K. what is the temperature
harkovskaia [24]

Answer:

The new temperature of the gas is 427K

Explanation:

In this case we use Charles's Law according to which the volume and temperature of a certain amount of gas are related, keeping the pressure constant.

V1 / T1 = V2 / T2

5,30L/298K=7,60L/T2

T2=7,60L/(5,30L/298K)=427,32K

8 0
3 years ago
Billy drives a water balloon from the roof of his house since the balloon began with an original Velocity of zero how far above
Artyom0805 [142]
3.7 I thank is the answer
6 0
3 years ago
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