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omeli [17]
3 years ago
5

Which statement about the elements in the periodic table is true?

Chemistry
2 answers:
nikitadnepr [17]3 years ago
8 0

The answer is B) The reactivity of alkali metals increases as atomic mass increases. Just checked on Gradpoint and it was correct!

UNO [17]3 years ago
5 0

b) The reactivity of alkali metals increases as atomic mass increases.

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Which of these best explains why water vapor has more energy than a block of ice?
Elanso [62]
It should be answer a
5 0
3 years ago
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match the number of negative charges to the number of positive charges to make each combination balanced (see image for answer)
BartSMP [9]

Answer : The correct match is:

1 positive charge = 1 negative charge

2 positive charges = 2 negative charges

3 positive charges = 3 negative charges

Explanation :

As we now that there are three subatomic particles which are protons, electrons and neutrons.

The protons and neutrons are located inside the nucleus and electrons are located around the nucleus.

The protons are positively charged, the electrons are negatively charged and neutrons are neutral.

As we know that all the things are made up of charges and opposite charges attract to each other.

In a neutral atom, the positive charges and negative charges are balanced in an object. That means, in neutral atom the number of positive charges are equal to the negative charges.

So we can say that:

1 positive charge = 1 negative charge

2 positive charges = 2 negative charges

3 positive charges = 3 negative charges

5 0
3 years ago
Mixture Problem A jeweler has five rings, each weigh- ing 18 g, made of an alloy of 10% silver and 90% gold. She decides to melt
Tpy6a [65]

Answer:

Explanation:

Total weight of 5 rings

= 18 x 5

= 90 g

silver = 10% of 90 g

= 9 g

gold = 81 g

Let silver added = x gm

Total weight = 90 +x

75% of (90+x) is gold

= 3/4 x  (90+x)g is  gold

So  3/4 x  (90+x)  = 81

(90+x)  = 81 x 4 / 3

= 108

x = 18 g

silver to be added = 18g .  

8 0
3 years ago
How are natural polymers and synthetic polymers similar?
Reptile [31]

Answer:

The correct answer is B) both are made up of monomers that are linked by covalent bonds

Explanation:

The polymers consist of a set of monomers by covalent bonds. There are those that are natural (DNA formed by nucleotide units, proteins by amino acids, starch by glucose) and synthetics made by human hands (polyethylene formed by ethylene monomers).

5 0
3 years ago
Count the number of each type of atom in the equation below, and then balance the equation. Write In the numbers of atoms and co
Studentka2010 [4]

Answer:

Balanced equation

CS2(l) + 3O2(g)------> CO2(g) + 2SO2(g)

Explanation:

For a chemical equation to be balanced, the number of atoms of each element on the left Hans side of the reaction equation must equal the number of atoms of that element on the right hand side of the reaction equation.

Atoms of oxygen are six on both sides of the reaction equation. Atoms of sulphur are two while there is only one atom of carbon on both sides of the reaction equation.

4 0
3 years ago
Read 2 more answers
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