3 years ago

The mass number of an atom is the sum of the atomic number and the number of..

Chemistry

1 answer:

Len [333]3 years ago

8 0

The answer here is neutrons

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Mercury is a liquid meteal but it is not hard? how can we say it is a metal

NNADVOKAT [17]

What's the problem ? Hardness is not the definition of a metal. You need to expand your thinking. EVERY element is solid, liquid, and gas, over different ranges of temperature ... including all of the metals. There are only TWO elements that are liquid AT ROOM TEMPERATURE, and mercury is one of them. But on a mild day at the south pole, mercury is solid too.

7 0

3 years ago

Describe the particles in each state of matter Solid: Liquid: Gas:

vichka [17]

Answer:

Solíd= vibrating

liquid= moving slowly

gas= moving faster

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3 years ago

Which of the following is an example of a compound?

VladimirAG [237]

Answer:

H2O is a compound because its a main constitute of earths hydrosphere

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2 years ago

A sulfur ion has 16 protons and 18 electrons. Find the net charge

andrezito [222]

I think its 2-, it gained 2 electrons.

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3 years ago

Given the equation: 2H2 + O2 → 2H2O, how many moles of oxygen are needed to react with 13 moles of hydrogen

bulgar [2K]

Explanation:

2H2 + O2 = 2H2O

2mol. 1mol. 2mol

2mol reacts with 1mol

13mol reacts with x

x=13mol × 1mol

2mol

x= 13mol

2mol

x= 6.5mol of oxygen

6 0

2 years ago