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4 years ago

WHAT IS THE START TEMP. WHEN BAKING SODA AND VINEGAR ARE MIXED NEED ANSWER RIGHT AWAY

2 answers:

7 0

If you begin with room-temperature vinegar, the temperature will drop about 12°F or about 7°C. There is also gas produced.

I believe that's right haha let me know

Sav [38]4 years ago

3 0

When they are mixed it will be warm b/c bonds r being broken

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In chemistry class, Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid. Sever

Degger [83]

Answer:

b) the metals strips

Explanation:

In an experimental design, an independent variable is a variable that is changed or manipulated in a series of experiments. An independent variable is not dependent on any other variable in the experiment. The hypothesis for this experiment is stated to be: "If the chemical activity of the metallic wrapper is increased, then less rusting of iron will occur. The independent variable relates to the type of metal wrapping strip, and the dependent variables are the amount of rusting and color of the water.

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3 years ago

Give all possible ml values for orbitals that have each of the following: (a) l = 3;

Angelina_Jolie [31]

At l = 3, ml =+3,+2,+1,0,-1,-2,-3

What are quantum numbers?

Quantum numbers are used to describe where around a nucleus a particular electron can be found.
In any given atom, each electron can be described by four quantum numbers.
These are n,l,m1,ms
The values that each number can be are based on a set of rules.

What is a magnetic quantum number ?

It describes the orientation of the orbitals.
It is represented as ml.
The value of this quantum number ranges from (-l to +l).
When l = 2, the value of will be -2, -1, 0, +1, +2.

To know more about magnetic quantum numbers, refer:

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8 0

2 years ago

Fabric A is used to rub a wooden rod. A second piece of Fabric A is used to rub an ebonite rod. It is observed that the wooden r

stepladder [879]

<h2>Answer:</h2>

<h3>What I think is : The protons are present at the centre of the atom with rotating electrons around it so when it is rubbed by fur the electrons get passed from the ebonite rod to the fur leaving the rod negatively charged</h3>

<h2>Hope this helps you ❤️</h2>

<h2>Mark me as brainliest ❤️</h2>

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3 years ago

How many molecules of h2o are equal to 97.2 g h2o

Eduardwww [97]

M(H₂O) = 97,2 g.
n(H₂O) = m(H₂O) ÷ M(H₂O).
n(H₂O) = 97,2 g ÷ 18 g/mol.
n(H₂O) = 5,4 mol.
N(H₂O) = n(H₂O) · Na.
N(H₂O) = 5,4 mol · 6,023·10²³ 1/mol.
N(H₂O) = 3,25·10²⁴ molecules of water.
n - amount of substance.
Na - Avogadro number.

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4 years ago

Read 2 more answers

Why are pure liquids and solids not included in the reaction quotient or the equilibrium constant expression for a given heterog

AfilCa [17]

Pure liquids and solids at the equilibrium stage:

Pure solids and pure liquids are not included in expressions for the equilibrium constant of heterogeneous equilibria since their concentrations are constant across time. Therefore, including it in our equilibrium expression is not significant.

Equilibrium expression:

When a certain chemical reaction is in equilibrium, the rates of the forward and backward reactions are equal, which means that there is no net change in the concentrations of the reactants and products and that the reaction mixture's composition does not change.

The concentration of solid and liquid:

Solid or liquid concentration,

= No. of Moles/ Volume in L

= Mass/(Volume × molar mass)

= Density/ Molar mass

Pure solids and liquids have constant densities and molar masses at a constant temperature.

Because of this, they have constant molar concentrations, which means that they are not considered in the equilibrium constant for a heterogeneous reaction.

Learn more about the pure solids, liquids, and heterogenous mixture here,

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2 years ago