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3 years ago

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Chemistry

1 answer:

MAXImum [283]3 years ago

6 0

Answer: 1.) A. Nebula

2.) I think it's K. Planetary Nebula

3.) E. Red Supergiant

4.) C. Main Sequence

5.) F. Supernova

6.) I. White dwarf

7.) B. Protostar

8.) G. Black Hole

9) J. Black dwarf

10.) H. Neutron Star

11.) D. Red Giant

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What would it take for Americans today to favor a greater reliance on nuclear power as a source of electricity

Ierofanga [76]

Answer:

yes

Explanation:

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4 years ago

HELP!! BEST ANSWER GETS BRAINLIEST!!

vampirchik [111]

The anwser is D. Radiation, because it can travel thru air.

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3 years ago

A bottle is partly filled with liquid water, sealed shut, and then placed under a heat lamp. The volume of the liquid water even

ANTONII [103]

Because the rate at which water vapour condenses gets increase slowly to get equal to the rate of evaporation of the water.

Explanation:

When a bottle is partly filled with liquid water is leaves space for vapours to escape and get condensed equally.

When sealed and kept below the lamp the rate of condensation increases due to the empty space in the bottle for getting vapours cool down.

A point arrives when evaporation equates the condensation of the liquid in bottle becomes stable because vapours cannot pass the bottle eventually condense and become liquid.

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3 years ago

Answer the following questions based on the reaction below: NaOH(aq) + KHP(s) --> NaKP(aq)+H2O(I)

Natali [406]

Answer:

a) 1.44g

b) 77.3%

Explanation:

1. Chemical balanced equation (given)

$NaOH(aq)+ KHP(s)\rightarrow NaKP(aq)+H_2O(l)$

2. Mole ratio

$1molNaOH(aq):1molKHP(s)$

This is, 1 mol of NaOH will reacts with 1 mol of KHP.

3. Find the number of moles in 72.14 mL of the base

$Molarity=\text{number of moles of solute}/\text{volume of solution in liters}$

$\text{Volume of solution}=72.14mL=0.07214liters$

$\text{Number of moles of NaOH}=0.0978M\times 0.07214liter=0.007055mol$

4. Find the number of grams of KHP that reacted

The number of moles of KHP that reacted is equal to the number of moles of NaOH, 0.007055 mol

Convert moles to grams:

mass = number moles × molar mass = 0.007055mol × 204.23g/mol

mass = 1.4408 g.

You have to round to 3 significant figures: 1.44 g (because the molarity is given with 3 significant figures).

5. Find the percentage of KHP in the sample

The percentage is how much of the substance is in 100 parts of the sample.

The formula is:

% = (mass of substance / mass of sample) × 100

% = (1.4408g/ 1.864g) × 100 = 77.3%

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3 years ago

90 grams of NaNO3 were added to solution at 10 degrees Celsius. What type of solution was formed?

vichka [17]

Answer:

friend me on here and imma send you the link Explanation:

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3 years ago

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