CHEMISTRY MIDDLE SCHOOL

What units does a triple beam balance measure?!

Answers

Answer 1
Answer:

A triple beam balance measures the mass of an object in grams.

Usually the reading scale markings are

Beam A: 0 g to 500 g in 100 g increments

Beam B: 0 g to 100 g in 10 g increments

Beam C: 0 g to 10 g with 1 g major divisions and 0.1 g minor divisions

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What is mostly commonly found element in the Earth's crust??​

Answers

Answer:

The most commonly found element in the earth's crust is Oxygen.

Explanation:

The atomic umber of Oxygen is 8.The electronic configuration of oxygen is 2,6.It belongs to the chalcogen family in the periodic table.It is a strong oxidizing agent and highly reactive non-metal.The amount of oxygen present in the earth's crust is 46.6%.The oxygen exists in two forms ,they are O_{2(oxygen) and O_(3)(ozone).The major compound of it exists in the form of silicate minerals where it combines with other minerals.It also exists i the compound as carbonates and phosphates. Oxygen with acetylene is used to cut and weld the metals.In the medical field,Oxygen is used to ease the respiratory disease and it is also used to manufacture the the explosives.

Answer:

water/h20

Explanation:

the earth is mostly contained of water

Which cell structure most resembles the human nervous system?endomembrane system

Golgi apparatus

nucleus

rough ER

Answers

The endomembrane system is the cell structure that most resembles the human nervous system. The reason for that is because it consists of a group of cell membranes and organelles that are interconnected in order to accomplish their function, similarly to those in the nervous system.
endomembrane system is the outside so this is it

You have 17 grams of water and you increase the temperature by 15 degrees Celsius how many joules did this take?a. 255
b. 1067
c. 1.13
d. 63

Answers

Answer: the correct answer is option(d).

Explanation:

Energy required ,Q= ?

Mass of water , m = 17 grams

Temperature difference or\Delta T = 15 °C

Specific heat value of water = 4.186 J/g °C

Q=mc\Delta T=17* 4.186 J/g^oC* 15^oC=1,067.43 J\approx 1,067 J

From the given value the , nearest value to to our calculated answer is 1067 J that option (b).

Hence, the correct answer is option (d).

Consider the equation: 2NO2(g) N2O4(g). Using ONLY the information given by the equation which of the following changes would increase the molar concentration at equilibrium of the product N2O4(g)?increase the pressure
increase the temperature
decrease the concentration of NO2(g)
decrease the temperature
decrease the pressure

Answers

I believe the correct answer is the first option. To increase the molar concentration of the product N2O4, you should increase the pressure of the system. You cannot determine the effect of changing the temperature since we cannot tell whether it is an endothermic or an exothermic reaction. Also, decreasing the number of NO2 would not increase the product rather it would shift the equilibrium to the left forming more reactants. The only parameter we can change would be the pressure. And, since NO2 takes up more space than the product increasing the pressure would allow the reactant to collide more forming the product.

The answers A. increase the pressure

Explanation:

Which describes the molecular behavior of a solid? I THINK IT'S A, BUT IM NOT SUREA. Molecules vibrate around a fixed point.
B. Molecules are too far apart to affect each other.
C. Molecules have the greatest energy of motion.
D. Molecules are rigid and do not move.

Answers

I also think it is A
Molecules in a solid should not be able to move. Otherwise it wouldn't be a solid! So the answer is D.

Hope this helps :) ~

What are abiotic factors of the enviroment lynx

Answers

Abiotic is non-living factors. Such as rocks, soil, and ph.

Answer:

an abiotic factor for a lynx environment would be a water, rocks, and oxygen

Explanation:

abiotic factors are things that are not alive.

hope this helps
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