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Serggg [28]
3 years ago
12

Which is more reactive copper or calcium? Why?

Chemistry
2 answers:
Strike441 [17]3 years ago
8 0
Calcium
this is because calcium will lose will lose more electrons and is a group 2 metal, copper is a transition metal which is a lower position and more stable than calcium.
qwelly [4]3 years ago
8 0

Answer:

Calicum

Explanation:

This is true because calcium loses more electrons and is a group 2 metal

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6. What is the molecular formula for this compound? The compound's empirical formula and
igomit [66]

Explanation:

A compound's empirical formula tells you the smallest whole number ratio ,The molar mass tells you what the total mass of one mole

6 0
2 years ago
1. organisms of different species that share similar characteristics most likely have..
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1. Parents from both species.

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Explanation:

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3 years ago
19.
solmaris [256]

Answer:

В.  No, because the mass of the reactants is less than the mass of the products.

Explanation:

Chemical equation:

NaBr + Cl₂      →      2NaCl + Br₂

The given equation is not balanced because number of moles of sodium and bromine atoms are less on reactant side while more on the product side.

There are one mole of sodium and one mole of bromine atom on left side of equation while on right side there are 2 moles of bromine and 2 moles of sodium atom are present. The number of moles of chlorine atoms are balanced.

Balanced chemical equation:

2NaBr + Cl₂      →      2NaCl + Br₂

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5 0
3 years ago
A scuba diver that ascends to the surface too quickly can experience decompression sickness, which occurs when nitrogen that dis
Butoxors [25]

Answer:

The factor that will change the volume of the diver's lungs upon reaching the surface is 4

Explanation:

Given data:

Pressure increases 1 atm = 101.325 kPa

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The factor will the volume of the diver's lungs change upon arrival at the surface:

\frac{V_{2}}{V_{1} } =\frac{P_{1}}{P_{2}} =\frac{405.3}{101.325} =4

5 0
3 years ago
How much in grams, does 5.68 x 1022 formula units of potassium dichromate weigh?
Alexxx [7]

Answer:

Explanation:

The molecular formula for Potassium Dichromate is K2Cr2O7. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Potassium Dichromate, or 294.1846 grams.

Note that rounding errors may occur, so always check the results.

8 0
2 years ago
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