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3 years ago

Which group iia metal magnesium or calcium is more active cite your evidence?

Chemistry

1 answer:

Burka [1]3 years ago

5 0

Calcium is more active because it is under magnesium on periodic table.

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A blank is 2 or more substances that are together in the same place but are not chemically combined.

hammer [34]

A mixture is a material system made up of two or more different substances, which are mixed but not combined chemically. A mixture refers to the physical combination of two or more substances in which the identities of the individual substances are retained.

Hope this helps!

Please give brainliest!

7 0

3 years ago

When solutions of silver nitrate and sodium chloride are mixed, a precipitation reaction occurs. What mass of precipitate can be

Bas_tet [7]

Explanation:

The given precipitation reaction will be as follows.

$AgNO_{3}(aq) + NaCl(aq) \rightarrow AgCl(s) + NaNO_{3}(aq)$

Here, AgCl is the precipitate which is formed.

It is known that molarity is the number of moles present in a liter of solution.

Mathematically, Molarity = $\frac{\text{no. of moles}}{\text{volume in liter}}$

It is given that volume is 1.14 L and molarity is 0.269 M. Therefore, calculate number of moles as follows.

Molarity = $\frac{\text{no. of moles}}{\text{volume in liter}}$

0.269 M = $\frac{\text{no. of moles}}{1.14 L}$

no. of moles = 0.306 mol

As molar mass of AgCl is 143.32 g/mol. Also, relation between number of moles and mass is as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

0.307 mol = $\frac{mass}{143.32 g/mol}$

mass = 43.99 g

Thus, we can conclude that mass of precipitate produced is 43.99 g.

8 0

3 years ago

What is a property of a substance?

S_A_V [24]

Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.

Explanation:

Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

8 0

2 years ago

What is the current in the 30 ohm heating coil of a coffee maker that operates on a 120 volt circuit?

SpyIntel [72]

Answer:

4Amps. i can't see other questions clearly

Explanation:

$using ohms law \\ v = ir$

V=120 volt
R=30ohms
I=?

I=V/R

I=120/30

I=4amps

8 0

3 years ago

The boiling point of a substance is affected by

Artyom0805 [142]

Answer:

The mass of the substance

7 0

3 years ago