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Gnesinka [82]
3 years ago
9

First to answer both CORRECTLY gets brainleist!

Chemistry
2 answers:
ycow [4]3 years ago
8 0

Answer: As the temperture of a main sequence star increases, the luminosity increases, vice versa

Cool and bright

Explanation:

madam [21]3 years ago
4 0

Answer: I am actually studying about Stars, so I got you.

3. As the temperature of a star Increases, it's luminosity increases.

As the temperature of a star decreases, it's luminosity decreases.

4. Hot and Bright. The bigger the star, the hotter it gets is from what I learned.

You might be interested in
Carbon can bond with other carbon atoms to produce cyclic hydrocarbon structures. true false
tigry1 [53]
The answer is true.
An example is cyclohexane.
6 0
3 years ago
HBrO(aq) + H2O(l) ⇄ H3O+(aq) + BrO−(aq)   Keq=2.8×10−9
Verdich [7]

Answer: The equilibrium concentration of BrO^- will be much smaller than the equilibrium concentration of HBrO, because Keq<<1

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K_{eq}

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

HBrO(aq)+H_2O(l)\rightarrow H_3O^+(aq)+BrO^-(aq)

The expression for K_{eq} is written as:

K=\frac{[H_3O^+]\times [BrO^-]}{[HBrO]}

Concentration of pure solids and liquids is taken as 1.

K=2.8\times 10^{-9}

Thus as K_{eq} , That means the concentration of products is less as the reaction does not proceed much towards the forward direction.

7 0
3 years ago
5. Molds and bacteria contain hydrolytic enzymes used to breakdown proteins,
Tpy6a [65]

Answer:Temperature affects storage time and food deteriorates faster at higher temperatures. Microorganisms grow rapidly at room temperature . Thus to slow microbial growth, enzymatic and oxidative processes, food must be stored at room temperature.

Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled. ... Because of its smaller surface area, the unsliced meat would have less collisions and therefore, a slower reaction rate.

Explanation:

5 0
3 years ago
5)
Kryger [21]

The empirical formula : C₁₂H₄F₇

The molecular formula : C₂₄H₈F₁₄

<h3>Further explanation</h3>

mol C (MW=12 g/mol)

\tt \dfrac{18.24}{12}=1.52

mol H(MW=1 g/mol) :

\tt \dfrac{0.51}{1}=0.51

mol F(MW=19 g/mol)

\tt \dfrac{16.91}{19}=0.89

mol ratio of C : H : O =1.52 : 0.51 : 0.89=3 : 1 : 1.75=12 : 4 : 7

Empirical formula : C₁₂H₄F₇

(Empirical formula)n=molecular formula

( C₁₂H₄F₇)n=562 g/mol

(12.12+4.1+7.19)n=562

(281)n=562⇒ n =2

Molecular formula : C₂₄H₈F₁₄

6 0
3 years ago
how many grams of silver bromide agbr can be dissolved in 50 milliliters of water? Changing the temperature and no other conditi
svet-max [94.6K]
<h3>1. <u>Answer</u>;</h3>

= 5.4×10-6 g AgBr

<h3><u>Explanation</u>;</h3>

AgBr(s) → Ag+(aq) + Br-(aq) Ksp = 3.3×10^-13

[Ag+][Br-] = Ksp = 3.3×10^-13 = X²

X = 5.7×10^-7 M = [Ag+] = mol/L AgBr that dissolve

1 mole of AgBr = 187.8 g

Therefore;

= 0.05 L × (5.7 × 10^-7 mol/L) × (187.8 g /mol)

= 5.4×10-6 g AgBr

<h3>2. <u>Answer and explanation;</u></h3>

The two factors that accounts for increased rate of chemical reaction when temperature is increased are:

  1. <u>Energy factor</u>; enough energy in the collision for the formation of an activated complex, where bonds are breaking and new ones forming. When temperature is increased, a greater number of molecular collisions possess enough energy to activate the reaction.
  2. <u>Frequency of collisions increases;</u> an increase in temperature makes particles move faster and collide more frequently, increasing the possibility of a reaction be-tween them.

More important factor; Energy factor is more important.

7 0
3 years ago
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