Marcus knows that sodium (Na) is found in Group 1, Period 3 on the periodic table. Where should he look to find another element that has similar properties to those of sodium?(1 point)

Question

Responses

In Group 1
In Group 1

In Period 3
In Period 3

On the opposite side of the Periodic Table
On the opposite side of the Periodic Table

At elements whose symbols begin with the letter N

A scientist discovers a stack of newspapers is burned completely to ash in his laboratory. How does the resulting mass relate to the initial mass of the stack of newspapers?(1 point)
Responses

The mass of the gasses and the ash should be double the mass of the original stack of newspapers.
The mass of the gasses and the ash should be double the mass of the original stack of newspapers.

The mass of the gasses and the ash should equal the mass of the original stack of newspapers.
The mass of the gasses and the ash should equal the mass of the original stack of newspapers.

The mass of the gasses and the ash should be one-half the mass of the original stack of newspapers.
The mass of the gasses and the ash should be one-half the mass of the original stack of newspapers.

The mass of the gasses and the ash should be one-fourth the mass of the original stack of newspapers.

Stuart measures 10 grams of water into a pan and freezes it. A day later he takes it out of the freezer and is surprised that it is larger than before he froze it. What is the mass of the ice?(1 point)
Responses

10 grams
10 grams

11 grams
11 grams

20 grams
20 grams

25 grams

The reactants in a chemical equation have 4 potassium atoms, 3 oxygen atoms, and 2 iron atoms. According to the law of conservation of matter, the products of this chemical equation should have:(1 point)
Responses

Twice as many atoms of each element.
Twice as many atoms of each element.

4 iron atoms, 2 potassium atoms and 3 oxygen atoms
4 iron atoms, 2 potassium atoms and 3 oxygen atoms

the same number of atoms of each element.
the same number of atoms of each element.

the same number of atoms but of different elements.
the same number of atoms but of different elements.

Note the equation below is not balanced. This is because the total number of atoms of each element in the reactants is not equal to the total number of atoms of each element in the products.

93b4bdd8-9f7d-4e4d-b02b-d7731f8cdb0c

In order to balance the equation, how many H atoms must be present in the second product that is formed?

(1 point)
Responses

1
1

2
2

3
3

4

Answer 1

Here are the responses to each question:

1. Where should Marcus look to find another element that has similar properties to those of sodium?

   • Response: In Group 1

2. How does the resulting mass relate to the initial mass of the stack of newspapers after burning?

   • Response: The mass of the gasses and the ash should equal the mass of the original stack of newspapers.

3. What is the mass of the ice after freezing 10 grams of water?

   • Response: 10 grams

4. According to the law of conservation of matter, the products of a chemical equation with 4 potassium atoms, 3 oxygen atoms, and 2 iron atoms should have:

   • Response: the same number of atoms of each element.

5. In order to balance the equation, how many H atoms must be present in the second product that is formed?

   • Response: Without more information about the equation itself, I cannot provide an exact answer. Please provide the equation if you need assistance with this specific question.

If you have any further questions or need clarification, feel free to ask!