Answer:
electrons
Explanation:
they are composed of negatively charged particles also known as electrons
Answer is 56 protons and 56 electrons.
Explanation;
Atomic number is equal to number of protons. Hence, when the atomic number is 56, it means that atom has 56 protons.
When the element is in neutral state,number of protons = number of electrons. Hence, we can say that barium atom has 56 electrons.
But same element can have different number of neutrons. Those are called isotopes. Hence, we cannot say that there are 56 neutrons in barium atom without having its mass number. (Mass number = number of protons + number of neutrons)
To find the volume of a 240-piece of cork, we need to know the mass or total weight of the cork. The given information only states the density of the cork, which is 0.24, but it does not provide the mass directly.
Density (ρ) is defined as the mass (m) of an object divided by its volume (V):
Density (ρ) = Mass (m) / Volume (V)
Given: Density (ρ) = 0.24 g/cm³ (as 0.24 is equivalent to 0.24 g/cm³ for this case)
Mass (m) = 240 g
We need to rearrange the formula to solve for the volume (V):
Volume (V) = Mass (m) / Density (ρ)
Volume (V) = 240 g / 0.24 g/cm³
Volume (V) = 1000 cm³
So, the volume of the 240 grams of cork is 1000 cubic centimeters (cm³).
Learn more about the volume from the link given below.
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Answer:
69.036 g of Compound is required to obtain 48.45 g of Oxygen.
Explanation:
Let us assume that the total mass of the compound is 100 g. So it means that this compound weighing 100 is composed 70.18 % of Oxygen or among 100 g of this compound 70.18 g is constituted by oxygen only. Hence, we can make a relation as that,
70.18 g O is present in = 100 g of a Compound
So,
48.45 g of O will be present in = X g of a Compound
Solving for X,
X = 100 g × 48.45 g ÷ 70.18 g
X = 69.036 g of Compound