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solong [7]
4 years ago
12

Why leaves often contain starch

Chemistry
1 answer:
Anastasy [175]4 years ago
7 0

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How many significant figures are in 5.40
kotykmax [81]
There are 3 significant figures in this value, all values before and after the decimal point are significant. As there is a decimal point, the zeros trailing are also significant.
4 0
3 years ago
Lewis structure for nitrogen triiodide, NI(3)
Rasek [7]

Answer:

Lewis structure for nitrogen triiodide,NI_3 is given in the attachment.

Explanation:

Given:

The given compound is Nitrogen triiodide. In which 1 atom of Nitrogen combines with 3 atoms of Iodine. Both Nitrogen and Iodine are non-metals,So they form covalent bond by sharing of electrons.

The electron configuration of Nitrogen and Iodine is given below;

N(7) = 1s^2,2s^22p^3\\I(53) = 1s^2,2s^22p^6,3s^23p^63d^{10},4s^24p^64d^{10},5s^25p^5

There are 5 electrons in valance shell of Nitrogen atom and 7 electrons in valance shell of Iodine atom.

So, 3 atom of Iodine shares 1 electron with 1 electrons of Nitrogen.

The Lewis dot Structure is in the attachment.

3 0
3 years ago
Which of the following pair has a larger size? a)K or K- b)Br or Br- c)O2- or F- d) Li or Na​
Anna11 [10]

Answer:

jabvVbbnndbznnsnsksloplshebxbsnejxjevdjdjwjsjxbsjwpzbrjsjdndn

Explanation:

zusbejdnd.d

shsjsksosbejzjdhdbdjedhd

dudbskwjxbdbdjsijednjzhenejd3jdbvfbsj

susjdjksuwhwudnjwibdghejdooejejdhdbbsndjl2lekkw

7 0
3 years ago
3. A light bulb containing argon gas is switched on,
Readme [11.4K]

Answer:

The assumption is quite reasonable.........

A lightbulb contains Ar gas at a temperature of 295K and at a pressure of 75kPa. The light bulb is switched on, and after 30 minutes its temperature is 418 K. What is a numerical setup for calculating the pressure of the gas inside the light bulb at 418K?

Explanation:

P

1

T

1

=

P

2

T

2

given constant

n

, and constant

V

, conditions that certainly obtain with a fixed volume light bulb.

And so

P

2

=

P

1

T

1

×

T

2

=

75

⋅

k

P

a

295

⋅

K

×

418

⋅

K

≅

100

⋅

k

P

a

.

Had the light bulb been sealed at normal pressure during its manufacture, what do you think might occur when it is operated?

5 0
3 years ago
Find the volume (in mL) of a substance that has a mass of 11.6 g and a density of 0.81 g/mL. Give your answer with two decimals.
ch4aika [34]

Answer:

14.83mL

Explanation:

11.6/0.81=14.3

7 0
3 years ago
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