Which of the following statements about metallic bond are correct?

1 answer:

4 0

2 and 3 are true. Metals are malleable because they don't bond tightly, or they have a "sea" of electrons that allow the atoms to move about freely. The more electrons that are available to bond, the more those atoms are attracted, causing a stronger bond. If you have any questions about this, please let me know!

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What creates Earth’s magnetic field?

DIA [1.3K]

Earth's magnetic field doesn't have much to do with tectonic plates. But both are caused by movement of the magma. The magnetic field is caused by electrical currents flowing in the magma, roughly parallel with the Equator. Tectonic plates move around the surface of the Earth over the liquid magma.

So I'd go with B. mantle convection currents

5 0

2 years ago

The picture shows a scientist collecting data from an ice core whats the answer giving brainliest

ziro4ka [17]

Answer:

Explanation:

Gas change and climate change are very similar and thats why its c

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2 years ago

What is the mass of 5.74 x 1021 formula units of sodium hydroxide: NaOH (Mw. 40.00 g/mol)?

taurus [48]

0.38g

Explanation:

Given parameters:

Number of formula units = 5.74 x 10²¹

Molar mass of NaOH = 40g/mol

Unknown:

Mass of NaOH = ?

Solution:

The best way to solve this problem is the use the mole concept.

A mole is the amount of substance that contains the avogadro's number of particles.

The avogadro's number of particles is 6.02 x 10²³particles.

Particles = neutrons, protons, electrons, formula units, e.t.c

To solve this problem, find the the number of moles first then convert to mass.

6.02 x 10²³ formula units = 1 moles

5.74 x 10²¹ formula units = $\frac{5.74 x 10^{21} }{6.02 x 10^{23} }$ = 0.95 x 10 $^{-2}$ moles

Mass of NaOH = number of moles x molar mass = 0.0095 x 40 = 0.38g

learn more:

Molar mass brainly.com/question/2861244

#learnwithBrainly

8 0

2 years ago

Calculate the molar enthalpy change of H2O (l) when liquid water is heated from 41.7 C to 76.2 C

yulyashka [42]

Enthalpy change is the total heat that is absorbed or evolved in a certain reaction that is being carried in a constant pressure system. It can be calculated by the product of the specific heat of the substance ad the difference of the final temperature and the initial temperature. Molar enthalpy change is the heat evolved or absorbed per 1 mole of a substance.The specific heat of water is 4.18 J per gram of water per degree Celsius. We calculate as follows:

Molar enthalpy change = 4.18 J / g - C ( 76.2 C - 41.7 C ) ( 18.02 g / mol ) = 2598.6642 J or 2.6 kJ

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3 years ago

1. Determine the final volume of a 1.5 M HCl solution prepared from 20.0 mL

nadezda [96]

Explanation:

Because molarity is classified as moles of solute per liter of water, dilution of the water may result in a reduction of its concentration.

Therefore, because the amount of moles of solute has to be constant for dilution, you will use the molarity and volume of that same target solution to calculate how many moles of solute will be present in the sample of the stock solution that you dilute.

c = $\frac{n}{v}$