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3 years ago

True or false: Halogens are very stable because they have a full outer shell of 8

Chemistry

1 answer:

STALIN [3.7K]3 years ago

8 0

Answer:

True

Explanation:

Halogens are very stable because they have a full outer shell of 8

true or false?

Brainiest plz and hope this answer helped let me know if you need any more help I am glad to help!

It's true!

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Need help with question 1 & 2

zhannawk [14.2K]

For question 1:

A. Carbon, hydrogen, oxygen

Calcium, carbon, oxygen

Carbon, hydrogen

Carbon, hydrogen, oxygen

Silicon, oxygen

B. Carbon: 12, hydrogen: 22, oxygen: 11

Calcium: 1, Carbon: 1, oxygen: 3

Carbon:1, Hydrogen: 4

Carbon: 3, hydrogen: 8, Oxygen: 1

Silicon: 1 oxygen: 2

C. Table sugar: 45

Marble: 5

Natural gas: 5

Rubbing alcohol: 12

Glass: 3

For question 2: N2O

6 0

3 years ago

Tienen capacidad de fijar enerjgia luminosa utilizando agua y co2 para transformarlo en carbohidratos

Cloud [144]

Answer:

las plantas

Explanation:

Las plantas son los seres vivos capaces de transformar energía luminosa utilizando agua y dióxido de carbono (CO₂) en energía química en forma de moléculas llamadas carbohidratos. El proceso a través del cual realizan esto se denomina fotosíntesis, y para ello requieren un pigmento de color verde denominado clorofila, el cual es necesario para captar la energía luminosa proveniente del Sol.

7 0

3 years ago

For each example, identify if the food contains mostly saturated or unsaturated fatty acids.

dedylja [7]

Answer:

1. Vegetable oil, which is a liquid at room temperature, is used in making cake batter. Unsaturated

2. Chocolate, which is solid at room temperature, is derived from a seed. Saturated

3. Butter, which is a solid at room temperature, is often used in cooking. Saturated

4. The oil inside flaxseed oil pills is liquid at room temperature. Unsaturated

Explanation:

Saturated fats are those kinds of fat that do not have a double bond between their carbon atoms when represented structurally. At room temperature, they tend to assume the solid-state, and they are mostly obtained from animal sources. Unsaturated fats do have a minimum of one double bond between their carbon atoms and tend to assume the liquid phase. They are mostly obtained from plant sources.

1. Vegetable oil is obtained from a plant source and is, therefore, unsaturated fat.

2. Chocolate even though it comes from cocoa is solid at room temperature and is mostly comprised of saturated fat.

3. Butter a solid at room temperature is mostly made up of saturated fat and is sourced from animals.

4. Flaxseed oil obtained from a plant source is mostly unsaturated fat.

3 0

3 years ago

20cm³ of methane gas was burnt in 20cm³ of oxygen. write a balanced chemical equation for the reaction and determine which of th

solniwko [45]

Answer:

CH4 +O2 => CO2 + 2 H2O

None were in excess

Explanation:

Equation for the reaction is,

CH4 + O2 =>CO2 +2 H2O

No of moles of CH4 = (20 /1000)/24 =0.02 /24 = 0.00083

No of moles of O2 =20 /24000 = 0.0083

CH4 : O2 = 1:1

THEREFORE

None of the gases were in excess.

7 0

4 years ago

Calculate the molarity of a solution consisting of 65.5 g of K2S0 4 in 5.00 L of solution.

tia_tia [17]

Answer:

Molarity is 0.075 M. 

Explanation:

Moles:

${ \tt{ = \frac{65.5}{RFM} }}$

RFM of potassium sulphate :

${ \tt{ = (39 \times 2) + 32 + (16 \times 4)}} \\ = 174 \: g$

substitute:

${ \tt{moles = \frac{65.5}{174} = 0.376 \: moles}}$

In volume of 5.00 l:

${ \tt{5.00 \: l = 0.376 \: moles}} \\ { \tt{1 \: l = ( \frac{0.376}{5.00} ) \: moles}} \\ { \tt{molarity = 0.075 \: mol \: l {}^{ - 1} }}$

8 0

3 years ago