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3 years ago

12

what type of substance would salt water be classified as?select all that apply.a.heterogeneous mixtureb.homogeneous mixturec.col

loidd.solutione.suspension

1 answer:

erica [24]3 years ago

8 0

<span>homogeneous mixture.
</span>A homogeneous mixture<span> is simply any </span>mixture<span> that is uniform in composition throughout.</span>

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Which of the following statements best explains why atoms bond?

Keith_Richards [23]

Answer:

atoms bond to attain neutral configuration or to get noble gas configuration.

Explanation:

atoms always want to be stable by attaining noble gas configuration.

they do so by forming bonds. they also bond to each other to make their outer electrons stable that is if the atom has an excessive electron than its neutral configuration it can bond to another atom that has one less electron than its neutral configuration by ionic bond.

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4 years ago

Calculate the mass percentage of CaCO3 in the 103g mixture of CaCO3 and Na2CO3, which produces 24 litres of CO2 at one atmospher

vaieri [72.5K]

Answer:

50%

Explanation:

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3 years ago

An unknown metal with a mass of 54.0 g required 773 J of energy in order to change its temperature from 63.0 C to 100.0 C. What

Vitek1552 [10]

Answer:

Metal is copper.

Explanation:

Mass of a metal, m = 54 g

Heat energy required, Q = 773 J

The temperature changes from 63.0 °C to 100.0 °C.

We need to identify the metal. Heat required to raise the temperature is given by :

$Q=mc\Delta T$

c is specific heat of the metal

We can identify the metal by finding its specific heat.

$c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{773}{54\times (100-63)}\\\\=0.386\ J/g^{\circ} C$

The metal is copper. Its specific heat is $0.386\ J/g^{\circ} C$ .

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3 years ago

How do protons in the nucleus behave?

IRISSAK [1]

Answer:

Protons and neutrons are made up of smaller subatomic particles. When protons or neutrons get close enough to each other, they exchange particles (mesons), binding them together. Once they are bound, it takes considerable energy to break them apart.

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3 years ago

What volume of a 0.3300-m solution of sodium hydroxide would be required to titrate 15.00 ml of 0.1500 m oxalic acid? c2 o4 h2(a

shtirl [24]

Answer : 13.64 mL

Explanation : The reaction requires 13.64 mL of NaOH

From the reaction we know that oxalic acid requires two moles of NaOH so we have to calculate the number of moles of both.

0.150 L X 0.1500 moles/L = 2.25 X $10^{-3}$

So the moles of NaOH will be 2 X (2.25 X $10^{-3}$ ) = 4.5 X $10^{-3}$

Now, we know the concentration of NaOH as 0.330 M

4.5 X $10^{-3}$ moles / 0.330 moles/L = 0.01364 L or 13.64 mL

So, the volume of NaOH needed to neutralize oxalic acid will be 13.64 mL

8 0

3 years ago

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