Ask question

Ask question

All categories

3 years ago

7

I need help with 14 and 15 please!

1 answer:

Dima020 [189]3 years ago

8 0

Isotopes of an element will contain the same number of protons and electrons but will differ in the number of neutrons they contain. In other words, isotopes have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.

You might be interested in

Which particle makes the atom an unstable isotope?

Galina-37 [17]

Instability of an atoms nucleus can result from an excess of either neutrons or protons . So neutrons and protons .

6 0

2 years ago

Is water a element or compond <br> and is it a homogeneous or heterogeneous

crimeas [40]

Answer:

Water is a compound. It contains more than one element

water is homogeneous

8 0

2 years ago

Read 2 more answers

I answered a question correctly and someone deleted my answer without giving me any explanation. I don't know why someone would

lina2011 [118]

Answer:

Same, my answer got deleted. Its a troll on here who wants to screw around with people.

5 0

2 years ago

At standard ambient temperature and pressure (SATP), a gas has density of 1.5328g/L. What is the molar mass of the gas?

ahrayia [7]

The standard ambient temperature and pressure are

Temperature =298 K

Pressure = 1atm

The density of gas is 1.5328 g/L

density = mass of gas per unit volume

the ideal gas equation is

PV = nRT

P = pressure = 1 atm

V = volume

n = moles

R= gas constant = 0.0821 Latm/mol K

T = 298 K

moles = mass / molar mass

so we can write

n/V = density / molar mass

Putting values

$Pressure=\frac{nRT}{V}=\frac{massXRT}{VXmolarmass}$

$Pressure=\frac{densityXRT}{molarmass}$

$molarmass=\frac{densityXRT}{Pressure}=\frac{1.5328X0.0821X298}{1}=37.50$

Thus molar mass of gas is 37.50g/mol

6 0

3 years ago

What are the parts of the earths mantle? A) Inner core, asthensophere, lithosphere

In-s [12.5K]

Answer:

B

Explanation:

The mantle is composed of the mesosphere and the asthenosphere in the upper most part and in the crust is the lithosphere

5 0

2 years ago