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3 years ago

Which is a homogeneous mixture? a. pizza b. woven fabric c. concrete d. vinegar

Chemistry

2 answers:

Tems11 [23]3 years ago

8 0

Answer:

vineger

Explanation:

homogeneous mixture cannot be separated pyhsically

tia_tia [17]3 years ago

4 0

Answer:

Explanation:

c is answer because the mixture of sad, garvel and rock, cement,the only it becomes concrete.

homogenous mixture means mixing with same amount and proportion of its component

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The sun has more gravity than the planets in our solar system because the sun is?

MatroZZZ [7]

Answer:

The sun is heavier than all of the planets, thus having more gravity

Explanation:

Because the sun is heavier, it exerts more gravitational pull towards itself, thus keeping all of the planets in orbit.

5 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

If we wish to prepare 250. mL of 0.200 M BaCl2 solution, how much solid BaCl2 is needed?

n200080 [17]

Answer:

10.4g

Explanation are in the Picture

8 0

3 years ago

Attem A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 9

monitta

Answer: The mass of solid is 105.4 g

Explanation:

To calculate the density of a substance, we use the equation"

$\text{Density of a substance}=\frac{\text{Mass of a substance}}{\text{Volume of a substance}}$ .......(1)

For liquid:

Mass of liquid = 26.6 g

Density of liquid = 0.865 g/mL

Putting values in equation 1, we get:

$0.865g/mL=\frac{26.6g}{\text{Volume of liquid}}\\\\\text{Volume of liquid}=\frac{26.6g}{0.865g/mL}=30.8mL$

We are given:

Volume of solid + Volume of liquid = 91.0 mL

Volume of liquid = 30.8 mL

So, volume of solid = 91.0 - 30.8 = 60.2 mL

Now, calculating the mass of solid by using equation 1, we get:

Volume of solid = 60.2 mL

Density of solid = 1.75 g/mL

Putting values in equation 1, we get:

$1.75g/mL=\frac{\text{Mass of solid}}{60.2mL}\\\\\text{Mass of solid}=(1.75g/mL\times 60.2mL)=105.4g$

Hence, the mass of solid is 105.4 grams

7 0

3 years ago

I need help on this one too

Jobisdone [24]

Answer:

The answer option which best describes nuclear fission is: C. A nucleus collides with a neutron and splits, releasing energy.

A nuclear reaction can be defined as a type of reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive element and accompanied by a release of energy.

Explanation:

8 0

3 years ago