CHEMISTRY HIGH SCHOOL

PLS PLS SOMEONE HELP ME ANSWER THESE QUESTIONS PLEEEAAASSSE!!(press on the picture so you can see the questions better!)​
PLS PLS SOMEONE HELP ME ANSWER THESE QUESTIONS PLEEEAAASSSE!! (press - 1

Answers

Answer 1
Answer:

Answer:

1)conduction

2) convection

3) conduction

4) radiation

5) radiation

6) radiation

7) conduction

8) conduction

9) radiation

10) convection

Explanation:

not 100% sure

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When scientists use one of their five senses to gather information, they are A. making an observation. B. making an inference. C. predicting a relationship D. drawing a conclusion.
Which radioisotope emits alpha particles?(1) Fe-53 (3) Au-198(2) Sr-90 (4) Pu-239
When a mixture of iron powder and sulphur is heated it glows more brightly than that of iron filings and sulphur.Explain this observation
The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 3.50 g of butane?
The molar heat of vaporization of water is 40.7kJ/mol. How much heat must be absorbed to convert 50.0 grams of liquid water at 100oC to steam at 100oC?A) 1.46 X 10 kJ B) 1.13 X 102kJ C) 2.04 X 103kJ D) 3.66 X 104kJ

How to figure out if compounds are electrolytes

Answers

An electrolyte is a compound that dissolved into its ions when placed into a solvent such as water (the ions can carry an electric charge). An easy way to test whether something is an electrolyte is by placing the substance in Deionized water and testing if the resulting solution can carry a current. If the resulting solution can carry a current, the substance is an electrolyte. I hope this helps. Let me know if anything is unclear.

If the momentum of a car is reduced by half, assuming mass did not change, what must also have been reduced by half?

Answers

Answer:

Velocity is halved

Explanation:

Momentum is contingent on mass and velocity. The quantity of motion in a body is called the momentum of the body.

  Momentum  = mass x velocity

Now, if mass does not change and momentum is reduced by half, it suggests that the velocity was reduced by half.

Velocity is directly related to momentum.

Describe how to properly measure the volume of a liquid.

Answers

Use a graduated cylinder.
The best way to measure it usually is to use a beaker or graduated cylinder. 

At what temperature is a gas likely to have the lowest rate of diffusion?10
150
b
210
с
249
d
300

Answers

Answer:

150

Explanation:

A gas will have the lowest rate of diffusion the lowest temperature from a given set of temperature values.

Since 150 is the lowest value, then this represents the lowest rate of diffusion.

The rate of diffusion is related to the prevalent temperature. When gases diffuse, they move from regions of high concentration to the at of low concentration. They must have enough kinetic energy to move in order to diffuse.

The higher the temperature, the more the kinetic energy and higher rate of diffusion.

Answer:

15º

Explanation:

The rate of diffusion is lower when the temperature is lower. Since 15º is the lowest temperature of the answers, it has the lowest rate of diffusion.

Write formula for these compounds: a. Sodium iodide b. Tin (II) chloride c. Potassium Sulfide d. Calcium iodide

Answers

All these compounds are ionic compounds and the formula of the compounds are: Tin(II) chloride - SnCl₂, potassium sulphide- K₂S, calcium chloride - CaCl₂.

What is chemical formula?

The chemical formula of a compound make them easy to identify the elements of composition. The formula of a compound s given with the chemical symbols of elements.

The subscripts of atoms is the number of that elements in the compounds. For instance, tin(II) chloride is formed by losing two electrons from the metal tin -Sn to each two chlorine atoms and thus the formula is  SnCl₂.

Potassium sulphide is an ionic compound formed by losing one electrons from potassium to the sulphur atom. Sulphur needs two electrons to attain octet thus it binds with two K atoms and the formula is K₂S.

Calcium chloride is formed by the ionic bonding between calcium and chlorine atom. Calcium has the valency of two thus, it donates two electrons each to each chlorine atoms and hence the formula is  CaCl₂.

To find more on chemical formula, refer here:

brainly.com/question/29031056

#SPJ2
a. Sodium iodide: NaI
b. Tin (II) chloride: SnCl2
c. Potassium Sulfide: K2S
d. Calcium iodide: CaI2

In amino acid "valine", the terminal groups attach with what atom?

Answers