Why does gold sink and wood float when they have similar volumes?

Answers

Answer 1

Answer:

gold is more dense than wood? hope its right!

Answer 2

Answer:

Answer:gold is more dense than wood wood has like air bubbles in it which makes it float and gold is solid with no bubbles

Explanation:

Related Questions

Which of the following is an example of a chemical change? A. melting solid gold B. burning hydrogen gas C. breaking a sheet of glass D. dissolving sugar in water
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How does your body respond differently the second time it is exposed to a pathogen than the first time it was exposed to the same pathogen?

Answers

after your first exposure to a pathogen, you have memory T cells that will remember the antigen of the pathogen son in the future if you would come in contact with the same pathogen your body will recognize it right away and be able to kill it much faster

How does the frogs vestigial thumb help survival?

Answers

to help create food establishment.

Using enthalpies of formation, calculate H.

Answers

ΔH° = -851.5 kJ/mol given that

$\begin{array}{cc}\textbf{Species}&{\bf {\Delta H_f\textdegree{}}}\n \text{Fe}_2\text{O}_3\;(s) & -824.2\;\text{kJ}\cdot\text{mol}^(-1)\n\text{Al}_2\text{O}_3\;(s) & -1675.7\;\text{kJ}\cdot\text{mol}^(-1)\end{array}$

(Source: Chemistry Libretexts.)

Explanation

Refer to a thermodynamic data table for the standard enthalpy of formation for each species.

Don't be alerted if the data for Al (s) and Fe (s) are missing. Why?

The standard enthalpy of formation of a substance measures the ΔH required to form each mole of it from the most stable allotrope of its elements under STP.
Both Al (s) and Fe (s) are already the most stable form of their element under STP (note that the state symbol matters.) There's no need to form them again.

As a result, $\Delta H_f\textdegree{} = 0$ for both Al (s) and Fe (s).

$\displaystyle \Delta H_{\text{rxn}}\textdegree{} = \text{Sum of }\Delta H\text{ for all }\textbf{Product} - \text{Sum of }\Delta H\text{ for all }\textbf{Reactant}}\n\phantom{\Delta H_{\text{rxn}}\textdegree{}} = (1* \Delta H_f\textdegree{}(\text{Al}_2\text{O}_3\;(s)) + 1* \Delta H_f\textdegree{}(\text{Al}\;(s)) \n \phantom{\Delta H_{\text{rxn}}\textdegree{}=}-(1* \Delta H_f\textdegree{}(\text{Fe}_2\text{O}_3\;(s)) + 1*\Delta H_f\textdegree{}(\text{Fe}\;(s))$

$\Delta H_{\text{rxn}}\textdegree{}} = (1 * (-1675.7)) - (1*(-824.2)) = -851.5\;\text{kJ}\cdot\text{mol}^(-1)$ .

The number "1" here emphasizes that in case there are more than one mole of any species in one mole of the reaction, it will be necessary to multiply the $\Delta H_f\textdegree{}$ of that species with its coefficient in the equation.

Which elements are metalloids? Check all that apply.boron
tungsten
aluminum
bismuth
silicon
tellurium

Answers

Answer:

Boron
Silicon
Tellurium

Explanation:

Elements in the periodic table are either metals, non-metals or metalloids.
Metals are elements that react by losing electron(s) to attain an octet configuration. They occupy groups I, II and III of the periodic table and the transition metals.
Non-metals, on the other hand, are elements that react by gaining electron(s) to attain a stable configuration. Examples include halogens and noble gases among others.
Metalloids are elements in the periodic table that have the properties of both metals and non-metals.
Other examples of metalloids are arsenic, tellurium, germanium and polonium.

Answer:

Boron

Silicon

Tellurium

Explanation:

edgenuity

How many atoms of calcium are in a unit of calcium phosphate whose formula is Ca3(PO4)2?A) one C) three

B) two D) four

Answers

The correct answer is answer choice C, three. In the formula Ca3 (P O4)2, there are 3 atoms of calcium (Ca), 2 atoms of phosphorus (P), and 8 atoms of oxygen (O). You can tell this by looking at the subscripts (or numbers, in this case, since you can't type subscripts). The subscript applies to the number directly beside it. Furthermore, if you have parentheses with a number beside it, just distribute. In this problem, we have (P O4)2.

(P O4) 2 Given
P2 O8 Distribute
We now have 2 atoms of phosphorus and 8 atoms of oxygen.

This problem has decided to be nice and just ask for calcium, so we don't have to distribute. All you have to do for this problem is look at the subscript beside Ca, which is 3. Therefore, the correct answer is C.

Answer: c

Explanation:brainliest

When exercising what happens to the heart rate and blood movement?

Answers

Your heart rate increases and your blood pressure increases, causing blood to flow around your body faster.

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