Atoms in a stay in a fixed position and have no freedom to move.

Answers

Answer 1

Answer: If atoms stay in a fixed position that means they are a solid

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Which of the following substance is not an acid? 1. Substance A is tested and found to have a pH of 3. 2. Substance B, a common food, tastes sour. 3. Substance C causes metals to corrode. 4. Substance D feels slippery in solution.

5. This lab examines the relationship between the density of a beverage and its sugar content. What assumption is madeconcerning the other ingredients in the beverage and their effect on its density? Is this a valid assumption? Why or why
not?

Answers

The characteristics of the density we can find that the answer for the effect of sugar is;

Densityincreases with increasing amount of sugar,
The other costituents is not reaction with the sugar.

Density is the relationship between the mass and the volume of a body, this is a very useful relationship for fluid mechanics exercise.

$\rho = (m)/(V)$

Where ρ is the density, m the mass and V the volume

In this laboratory the liquid is possibly water since a solution is formed with the sugar, the volume of the solution does not change with the introduction of the solute (sugar), therefore the introduction of sugar creates a change in the mass of the solution.

Consequently, if the mass increases and the volume remains constant, the density should increase, possibly in a linear fashion with increasing mass.

The most important assumption is that the effect of the other ingredients of the drink is that it does not react with the sugar.

In conclusion using the density characteristics we find that the response for the sugar effect is;

Density increases with increasing amount of sugar, assuming that there is no reaction between the sugar and the other constituents of the solution.

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Final answer:

The assumption is that other ingredients do not noticeably affect the density of the beverage, and changes in density are attributed solely to sugar content. The validity of this assumption would depend on various factors such as the densities and quantities of the other ingredients.

Explanation:

The assumption in this lab is that the other ingredients in the beverage do not significantly impact its density. This would imply that the changes in density observed are due solely to the sugar content. The validity of this assumption would depend on several factors. For instance, if the other elements are in relatively small quantities, or their densities are similar to that of the primary component (water in most beverages), the assumption may hold true. Nonetheless, it's important to point that this is an approximation, as in reality, every ingredient may contribute to the overall density.

Learn more about Density-Sugar Relationship here:

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Which is a physical change?A)
burning wood
Eliminate
B)
rusting metal
C)
cooking an egg
D)
freezing water

Answers

Freezing water is an example of a physical change

freezing water,answer choice d

Simple chem question - please help!Given the equation: N2 +2O2 → 2NO2, what mass of oxygen is required to react completely with 7g of nitrogen?

A) 8 g
B) 16 g
C) 32 g
D) 64 g

Answers

Molar mass O₂ = 32.0 g/mol and N₂ = 28.0 g/mol

N₂ +2 O₂ → 2 NO₂

28.0 g -------> 32.0 * 2
7 g ----------> ?

Mass of O₂ = 7 * 32.0 * 2 / 28.0

Mass of O₂ = 448 / 28.0

= 16 g of O₂

Answer B

hope this helps!

Answer:

guy above is right

Explanation:

Knowledge of atomic structure has evolved over time. Thomson discovered that atoms contain electrons, Rutherford discovered that most of the mass of an atom is concentrated in its center, and Bohr discovered that electrons orbit the nucleus. Taken together, what do these discoveries demonstrate

Answers

J.J. Thompson's plum pudding model was devised after thediscovery of electron but before the discovery of the nucleus of the atom.Rutherford, who overturned Thompson's plum pudding model proposed that onhis experiment (Rutherford model) he discovered that the atom has a tiny, heavynucleus, which is named as nucleus of the atom. While the most important properties of atomic and molecular structure was explained using the simple [picture ofan atom called the Bohr Model. This model was proposed by Niels Bohr. He alsoconcluded that an atom is a small, positively charged nucleussurrounded by orbiting electrons. Thedifferent theories and discoveries by the great scientists mentioned abovedemonstrate the atomic model and composition of atoms.

Answer:

A. The cumulative nature of science.

Explanation:

What is the shape of a water molecule?a. bent
b. linear
c. pyramidal
d. tetrahedral

Answers

a. bent..................................

What is the mass in grams of 1.73 moles CaH2

Answers

The mass of 1.73 moles CaH2 is 72.82 grams. The molar mass of CaH2 is 42.08 g/mol. This means that there are 42.09 grams in 1 mol. So, x grams will be in 1.73 mol of CaH2. Let's make a proportion: 42.09 g : 1 mol = x : 1.73 mol. x = 42.09 g * 1.73 mol : 1 mol. x = 72.82 g.

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