CHEMISTRY HIGH SCHOOL

What effect does attendance have on students grade in science class?
Hypothesis:

Answers

Answer 1
Answer:

Answer the more absents the lower a grade

Explanation:if you’re not attending you don’t learn

Related Questions

If you were asked to describe metals and magnetism you could say. A. non–paired electrons spin in opposite directions in all metals, creating a magnetic field. B. metals are magnets because they have more electrons than non–magnetic materials. C. metals can become magnetic if they have many spinning electrons that create magnetic fields. D. the electrons in some metals pair up to create a magnetic field.
36 Which compound has the highest percent com­position by mass of strontium?(1) SrC12 (2) SrI2 (3) SrO (4) SrS
Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI.
What other forms of radiation may come from the stars?
Hydrogen bonding occurs in molecules when a _____________. (1 point)hydrogen atom forms a covalent bond with one other atom. hydrogen atom forms covalent bonds with more than one atom. hydrogen atom of a polarized molecule bonds with an electronegative atom hydrogen atoms form an ionic bond with one other atom

Which of the following explains why hot liquids have a greater average energy of motion than cold liquids? *Hot liquids have more electrons
Cold liquids have more electrons.
Particles in hot liquids move faster than particles in cold liquids
Particles in cold liquids move faster than particles in hot liquids.

Answers

Particles in hot liquids move faster than particles in cold liquids. The faster a particle moves, the greater its kinetic energy.

The number of electrons in a particle has nothing to do with its kinetic energy.

Particles in cold liquids move more slowly than particles in hot liquids.

What is the main intermolecular force in H2CO?(dipole dipole, hydrogen bond, London dispersion,polar/nonpolar)

Answers

Dipole-dipole interactions, and London dispersion interactions

The action of some commercial drain cleaners is based on the following reaction: 2 NaOH(s) + 2 Al(s) + 6 H2O(l) → 2 NaAl(OH)4(s) + 3 H2(g) What is the volume of H2 gas formed at STP when 6.32 g of Al reacts with excess NaOH?

Answers

Answer : The volume of H_2 gas formed at STP is 7.86 liters.

Explanation :

The balanced chemical reaction will be:

2NaOH(s)+2Al(s)+6H_2O(l)\rightarrow 2AnAl(OH)_4(s)+3H_2(g)

First we have to calculate the moles of Al.

\text{Moles of }Al=\frac{\text{Mass of }Al}{\text{Molar mass of }Al}

Molar mass of Al = 27 g/mole

\text{Moles of }Al=(6.32g)/(27g/mole)=0.234mole

Now we have to calculate the moles of H_2 gas.

From the reaction we conclude that,

As, 2 mole of Al react to give 3 mole of H_2

So, 0.234 moles of Al react to give (0.234)/(2)* 3=0.351 moles of H_2

Now we have to calculate the volume of H_2 gas formed at STP.

As, 1 mole of H_2 gas contains 22.4 L volume of H_2  gas

So, 0.351 mole of H_2 gas contains 0.351* 22.4=7.86L volume of H_2 gas

Therefore, the volume of H_2 gas formed at STP is 7.86 liters.

A supervisor spends a day inspecting a nuclear plant for potential radiation leaks. She has to move throughout the plant inspecting all the equipment and machinery. She needs to take two different radiation detection devices to help ensure her safety and to find radiation leaks. She needs the results immediately. Which two devices would be the best choices for the task?

Answers

In order to immediately detect traces and signs of radiation leaks in the nuclear power plant, the supervisor must use two devices that readily give its results. These devices could be a Geiger-Mueller tube or Geiger counter and a Personal Radiation Detector (PRD). A PRD has a very fast response time, while a Geiger counter also displays results real time.

Answer:

Geiger-Mueller tube or Geiger counter and a Personal Radiation Detector (PRD).

Explanation:

In order to immediately detect traces and signs of radiation leaks in the nuclear power plant, the supervisor must use two devices that readily give its results. These devices could be a Geiger-Mueller tube or Geiger counter and a Personal Radiation Detector (PRD). A PRD has a very fast response time, while a Geiger counter also displays results real time.

An element has an atomic number of 30. How many protons and electrons are in a neutral atom of the element? A. 30 protons, 30 electrons B. 15 protons, 15 electrons C. 60 protons, 30 electrons D. 30 protons, 0 electrons

Answers

Atomic number shows the number of protons in an atom's nucleus. If the atomic number is 30, then it has 30 protons. The question says it is neutral, so it must have the same amount of protons and electrons.

A is the correct answer based on this. 

Which of the radioactive emissions has the highest energy

Answers

The correct answer is the gamma ray. It has the most penetration power and will pass through a number of things. Also, a gamma ray has shorter wavelength therefore higher energy from the equation, Energy = hc/wavelength.
Other Questions
How many moles of H 2 will I need to make 5 moles of NH3?12 SSO
A chemical reaction in which two or more substances undergo a chemical union to form a more complex substance is a _______ reaction. A. double replacement B. substitution C. decomposition D. combination
Two liquids that are soluble in each other are said to be____
How many particles are in 3 moles?