Ask question

Ask question

All categories

3 years ago

10

Instructions:Select the correct answer. A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy

and cannot be separated into oil and water by filtration. Moreover, its components do not separate when left standing. What type of mixture is it?

1 answer:

olga2289 [7]3 years ago

6 0

<span>What type of mixture is it:
Colloid </span>

You might be interested in

Why do elements form compounds? What elements never form compounds and why?

Alja [10]

Answer:

Elements form compounds to satisfy the octet rule. Noble gasses never form compounds because they already satisfy the octet rule.

Explanation:

The octet Rule is the theory that an element will attempt to gain a valence of 8 by binding with another element in it's vicinity. This can happen in a variety of ways, but the main thing to remember is that they will take the "shortest path" to 8(I.e an element will sometimes lose an electron or 2 if it has a valence 1 or 2 to loop back around to 8, while an element with a valence of 6 or 7 will attempt to gain 2 or 1 electrons).

Valence of elements can be counted by group in the image attached.

Group 1 has a valence of 1, Group 2 has a valence of 2, then we move to group 13 which has a valence of 3, group 14 has a valence of 4, group 15 has a valence of 5, group 16 has 6, group 17 has 7, and group 18 is the noble gasses which have 8.

7 0

3 years ago

The first part of a balanced chemical equation for a chemical reaction is shown below:

Bond [772]

Answer:

The answer to your question is 6

Explanation:

Data

Cu + 2AgNO₃ ⇒

To find the answer, count the number of each element in the reactants

Element Quantity

Copper 1

Silver 2

Nitrogen 1

Oxygen 6

Then, in the products, there must be 6 oxygens so in the products there must be 6 oxygens so the reaction is balanced.

8 0

3 years ago

A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis o

MAVERICK [17]

Answer : The value of $\Delta G_{rxn}$ is -49.6 kJ/mol

Explanation :

First we have to calculate the reaction quotient.

Reaction quotient (Q) : It is defined as the measurement of the relative amounts of products and reactants present during a reaction at a particular time.

The given balanced chemical reaction is,

$ATP(aq)+H_2O(l)\rightarrow ADP(aq)+HPO_4^{2-}(aq)$

The expression for reaction quotient will be :

$Q=\frac{[ADP][HPO_4^{2-}]}{[ATP]}$

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.

Given:

$[ATP]$ = 5.0 mM

$[ADP]$ = 0.60 mM

$[HPO_4^{2-}]$ = 5.0 mM

Now put all the given values in this expression, we get

$Q=\frac{(0.60)\times (5.0)}{(5.0)}=0.60mM=0.60\times 10^{-3}M$

Now we have to calculate the value of $\Delta G_{rxn}$ .

The formula used for $\Delta G_{rxn}$ is:

$\Delta G_{rxn}=\Delta G^o+RT\ln Q$ ............(1)

where,

$\Delta G_{rxn}$ = Gibbs free energy for the reaction = ?

$\Delta G_^o$ = standard Gibbs free energy = -30.5 kJ/mol

R = gas constant = $8.314\times 10^{-3}kJ/mole.K$

T = temperature = $37.0^oC=273+37.0=310K$

Q = reaction quotient = $0.60\times 10^{-3}$

Now put all the given values in the above formula 1, we get:

$\Delta G_{rxn}=(-30.5kJ/mol)+[(8.314\times 10^{-3}kJ/mole.K)\times (310K)\times \ln (0.60\times 10^{-3})$

$\Delta G_{rxn}=-49.6kJ/mol$

Therefore, the value of $\Delta G_{rxn}$ is -49.6 kJ/mol

6 0

3 years ago

How much volume (in L) will 8,326 dg of a substance having a density of 1.47 g/mL occupy?

Elenna [48]

Answer:

About 0.566 L.

Explanation:

Let the substance be represented by <em>X</em>.

We want to determine how much volume in L will 8,326 dg (decigrams) of the substance which has a density of 1.47 g/mL occupy.

To convert from 8,326 dg to L, we can first convert from dg to g, g to mL using the density, and mL to L.

Recall that 1 g = 10 dg and 1 L = 1000 mL. We are also given that the density of <em>X</em> is 1.47 g/mL. This yields three ratios:

$\displaystyle \frac{1 \text{ g X}}{10\text{ dg X}}, \, \frac{1 \text{ mL X}}{1.47 \text{ g X}}, \text{ and } \frac{1 \text{ L X}}{1000\text{ mL X}}$

Starting with the initial value, multiply:

$\displaystyle 8326 \text{ dg X} \cdot \frac{1 \text{ g X}}{10 \text{ dg X}} \cdot \frac{1 \text{ mL X}}{1.47 \text{ g X}} \cdot \frac{1 \text{ L X}}{1000 \text{ mL X}} = 0.566 \text{ L X}$

Hence, 8,326 dg of the substance occupies about 0.566 L.

7 0

3 years ago

What triggers the onset of estrus in most seasonal breeders

Anna11 [10]

Answer:

· Litter loss triggers estrus in a nonsocial seasonal breeder

Explanation:

6 0

2 years ago