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zalisa [80]
3 years ago
14

What two quantities must be known to calculate the density of a sample of matter?

Chemistry
2 answers:
Tanya [424]3 years ago
7 0
The answer is A, mass and volume.

The equation for density, <span>ρ,</span> is ρ = m/V. m is mass and V is volume.
Mkey [24]3 years ago
6 0

Answer:

remember the formula for density:

d = \frac{m}{v}

where d is density, m is mass, and v is volume.

Therefore, B. mass and volume is needed to determine the density

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Can hydrobromic acid be a valid chemical formula?
EastWind [94]
Yes, it can - HBr is its chemical formula.
If you had other options though, then the one which wouldn't be a valid chemical formula is aluminum (III) chloride, because, since it only has one charge (+3), it is unnecessary to state it as III.
7 0
3 years ago
Using the evidence provided, generate a pattern that describes the chemical reactivity of metals.
Afina-wow [57]

Answer:

B)As you go from left to right, reactivity of metals increases. As you go down in a group, reactivity of metals decreases.

Explanation:

reactivity of metals can be explained as how it can easily lose electron, i.e oxidize as well as reaction with non-metals.

There are factors that influence the reactivity of metals such as

1)atomic radius

2)nuclear charge

3)shielding effect

4) The sublevel arrangement of electrons

In the periodic table,the group 1, known as alkali metals, are the most reactive metals

Therefore, as we from left to right, reactivity of metals increases. As we move down in a group, reactivity of metals decreases.

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4 years ago
Question 12 of 25
Alenkinab [10]

Answer:

D They have the same properties.

Explanation:

The same no. of isotopes doesnot describes because isotopes have same symbol but didderent atomic mass.

3 0
3 years ago
Why do populations of bacteria in nature eventually stop growing
LekaFEV [45]
They run out of nutrients or supplies. such as other organisms
8 0
3 years ago
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What is the maximum number of electrons that can be identified with each of following sets of quantum numbers? If there are none
vichka [17]

Answer:

So, only one electron is there with n = 0, l = 0 and its quantum set is n = 0, l = 0, ml = 0, ms = -1/2. Hope, this is helping. The maximum number of electrons that can fit inside a 'n' shell is 2n^2. So it would be 1.

Explanation:

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3 years ago
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