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3 years ago

ANSWER ASAP thanks

Chemistry

2 answers:

Lady_Fox [76]3 years ago

6 0

Answer:

Its D

Explanation:

I Did It on Edge2020

weqwewe [10]3 years ago

5 0

Answer:

Option D: it's ability to lose electrons

Explanation:

Alkali metals are usually discovered in nature. They have highly reactivity at STP conditions (standard temperature and pressure conditions) and easily lose their outermost electron to form positive ions known that have a charge of +1.

Thus, what can determine the extent of reactivity of an alkali metal, is it's ability to lose electrons

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What is an isotope

Andrews [41]

Answer:

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Explanation:

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3 years ago

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To what temperature must an ideal gas at 27°C be cool to reduce its volume by 1/3

cricket20 [7]

Here my friend

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2 years ago

What is the gram formula mass (molar mass) of Silicon Tetrabromide? Write the formula first!

agasfer [191]

Answer:

SiBr₄= 347.7 g/mol

Explanation:

Gram formula mass:

Gram formula mass is the atomic mass of one mole of any substance.

It can be calculated by adding the mass of each atoms present in substance.

SiBr₄:

Atomic mass of Si = 28.1 amu

Atomic mas of Br = 79.9 amu

There are four atoms of Br = 79.9 ×4

There is one atom of Si = 28.1 × 1

Gram formula mass of SiBr₄:

SiBr₄ = 79.9 ×4 + 28.1 × 1

SiBr₄= 319.6 + 28.1

SiBr₄= 347.7 g/mol

6 0

3 years ago

The quartz in granite begins to melt at 650°C, so if we find a migmatite where quartz has melted in a granitic rock and we know

Elanso [62]

Answer:

d. 26.0 km

Explanation:

If the temperature in the region increases with depth by about 25 °C /km, then at a depth of 2 km the temperature would be 50 °C higher, at a depth of 3 km the temperature would be 75 °C higher and so on.

<u>The only way for finding melted quartz would be if the temperature is at least 650 °C.</u>

Temperature = 25 °C /km * Depth

We put the data given by the problem and <u>solve for Depth</u>:

650 °C = 25 °C /km * Depth

Depth = 26.0 km

6 0

4 years ago

A student mixes 40. Ml of 0. 10mhbr(aq) with 60. Ml of 0. 10mkoh(aq) at 25°c. What is the [oh−] of the resulting solution?

diamong [38]

After the complete neutralization reaction occurs, excess hydroxide ion is left unreacted the hydroxide ion of the resulting solution, [OH-] is 0.02 M.

<h3>What is the concentration of the hydroxide ion, [OH-]?</h3>

The hydroxide ion concentration is the amount in moles of hydroxide ion in a solution.

The hydroxide ion concentration is written as [OH-].

The equation of the reaction is given below:

1 mole of HBr reacts with 1 mole of KOH

Moles of HBr = 40 mL × 0.1 M = 4 mm moles

Moles of KOH = 60 mL × 0.1 M = 6 m moles

Moles of [OH-] = 6 - 4 = 2 m moles

Volume of solution = 100 mL

$[OH-] = \dfrac{2m\; moles}{100\; mL} = 0.02 M$

Thus, the concentration of the hydroxide ion, [OH-] is 0.02 M.

Learn more about hydroxide ion

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3 0

2 years ago