What property do most metals share

PLSSS HELPPPPPPPPPPPPPP I WILL MARK BRAINLIESTTTT!! you will save my lifeeeeeeeeeeeeeeeeeee

Ymorist [56]

Dependent could be the amount of water, the time that you are using in the u tube. Independent could be the amount of hydrogen and oxygen gass.

Remember, dependent variable is something that you control or measurement. Like for example. You have 2 different tubes one with 5ml of water and the other one with 10ml.

Independent something you cannot control. Like the amount of light can a plant receive or how much long it will take water to boil depending on the how high the fire is

5 0

3 years ago

ANSWER ASAP WILL GIFT BRANILIEST Which of the following happens to a molecule of an object when the object is cooled? A Its temp

Paladinen [302]

Answer:

It loses kinetic energy.

Explanation:

The definition of heat is molecules moving fast, so it cooling would mean they slow down.

6 0

3 years ago

Read 2 more answers

Solutions of hydrogen in palladium may be formed by exposing Pd metal to H gas. The concentration of hydrogen in the palladium d

Juliette [100K]

Explanation:

Mass of solution , m= 0.94 g + 215 g = 215.94 g

Volume of the solution = V

Density of solution = d = $10.8 g/cm^3$

$V=\frac{m}{d}=\frac{215.94 g}{10.8 g/cm^3}=19.99 cm^3=19.99 mL$

$1 cm^3=1 mL$

$1 mL=0.001 L$

$V=0.01999 L$

Moles of hydrogen = $\frac{0.94 g}{2 g/mol}=0.47 mol$

Molarity of hydrogen gas:

$Molarity=\frac{Moles}{\text{Volume of solution (L)}}$

$=\frac{0.47 mol}{0.01999 L}=0.02351 mol/L$

Molality of hydrogen gas :

Mass of solvent or here it is palladium = 215 g =0.215 kg (1 g = 0.001 kg)

$Molality=\frac{Moles}{\text{Mass of solvent(kg)}}$

$=\frac{0.47}{0.215 kg}=2.1860 mol/kg$

Mass percentage of hydrogen is solution :

$\frac{\text{Mass of hydrogen}}{\text{Mass of solution}}\times 100$

$=\frac{0.94 g}{215.94 g}\times 100=0.435\%$

5 0

4 years ago

Consider the addition of NaCl to the ice-water mix in Part II. Which of the following statements is TRUE?

Sati [7]

B is correct

salt lowers the freezing point of water (colligative property) by lowering the interaction and intermolecular forces between water molecules

6 0

3 years ago

If 300.0 grams of FeCr2O7 react, how many grams of O2 will be consumed

kvv77 [185]

You are given 300 grams of FeCr2O7. You are required to get the mass of O2 in grams. The first thing to do is to find a reaction between FeCr2O7 and O2. The balanced chemical reaction is 2Fe + 6Cr + 21/2O2 -> Fe2(Cr2O7)3. The molar mass of Fe2(Cr2O7)3 is 759.65 grams per mole and 32 grams per mole for O2.
<span>
300g Fe2(Cr2O7)3 (1 mol Fe2(Cr2O7)3/759.65 g Fe2(Cr2O7)3)(21/2 mol O2/1 mole Fe2(Cr2O7)3)(32 g O2/1 mole O2) = <u>132.7 g O2</u></span>

5 0

4 years ago