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2 years ago

What family of elements in the periodic table contains the most reactive metals?

Chemistry

2 answers:

artcher [175]2 years ago

8 0

Answer:

This answer is in correct.

Explanation:

The family that contains the most reactive metals are the alkali metals.

jeka57 [31]2 years ago

4 0

Alkali metals.

Elements found in group 1 of the periodic table.

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Chemistry unit one <br> does anybody know how to the math part of the unit please .. like the

marin [14]

Answer:

1. 156.818182 kg

2. 22.525 gallons

3. 437.4 yds

Explanation:

1. 345/2.2 (since 2.2 lbs equals 1 kg you would divide that by the number of pounds to find kg).

2. 85 x 1.06 = 90.1 (to find the number of qts)

90.1/4 = 22.525 (there are 4 quarts in a gallon so you would divide by 4)

3. 400 x 39.37 = 15,748 (multiply number of meters by the number of inches)

15,748/36 = 437.4 (divide by 36 since you are moving to a bigger unit)

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2 years ago

What are some abiotic factors that ocean creatures near the shore need to be adapted to?

alexdok [17]

Answer:A.salinity levels, air quality, water density

Explanation:nba youngboy

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2 years ago

Complete combustion of 9.00 g of a hydrocarbon produced 28.9 g of co2 and 9.87 g of h2o. what is the empirical formula for the h

AVprozaik [17]

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3 years ago

What set of coefficients will balance the chemical equation: _NaBr (aq) + _H3PO4 (aq) → _Na3PO4(aq) + _HBr (aq)

GaryK [48]

The Balanced chemical equation for above reaction will be :

$\small{ \mathrm{3NaBr + H_3PO_4 \rightarrow Na_3PO_4 + 3HBr}}$

The Coefficients will be :

$NaBr - 3$

$H_3PO_4 - 1$

$Na_3PO_4 - 1$

$HBr - 3$

So, Correct option is :

A. 3, 1, 1, 3

_____________________________

$\mathrm{ \#TeeNForeveR}$

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2 years ago

Write a nuclear equation to describe the neutron induced fission of Pu-239 to form Kr-89 and Ce-149 (this fission is induced by

zlopas [31]

Answer:

$\rm 2_{0}^{1}\text{n} + \, _{94}^{239}\text{Pu} \longrightarrow_{36}^{89}\text{Kr} + \, _{58}^{149}\text{Ce} + \, 3_{0}^{1}\text{n}; three$

Explanation:

If the fission is induced by two neutrons, the unbalanced equation is

$2\rm _{0}^{1}\text{n} + \, _{94}^{239}\text{Pu} \longrightarrow_{36}^{89}\text{Kr} + \, _{58}^{149}\text{Ce} + \, x_{0}^{1}\text{n}$

The main point to remember in balancing nuclear equations is that the sums of the superscripts and the subscripts must be the same on each side of the equation .

Balancing the superscripts, we get

2 + 239 = 89 + 149 + x

241 = 238 + x

x = 3

The balanced nuclear equation is

$\rm 2_{0}^{1}\text{n} + \, _{94}^{239}\text{Pu} \longrightarrow_{36}^{89}\text{Kr} + \, _{58}^{149}\text{Ce} + \, \mathbf{3}_{0}^{1}\text{n}$

$\text{The fission produces } \boxed{\textbf{three}} \text{ neutrons}$

4 0

2 years ago